{"id":7547,"date":"2017-02-20T10:19:20","date_gmt":"2017-02-20T17:19:20","guid":{"rendered":"https:\/\/askthescientists.com\/qa\/vitamind\/"},"modified":"2025-12-15T15:19:02","modified_gmt":"2025-12-15T22:19:02","slug":"vitamind","status":"publish","type":"qa","link":"https:\/\/askthescientists.com\/fr\/qa\/vitamind\/","title":{"rendered":"Vitamin D d\u2019USANA"},"content":{"rendered":"<div class='flex_column_table av-3j2e8ee-011863f9cab4e9d0793dc0400b17701e sc-av_one_third av-equal-height-column-flextable'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-3j2e8ee-011863f9cab4e9d0793dc0400b17701e\">\n.flex_column.av-3j2e8ee-011863f9cab4e9d0793dc0400b17701e{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-3j2e8ee-011863f9cab4e9d0793dc0400b17701e av_one_third  avia-builder-el-0  el_before_av_two_third  avia-builder-el-first  first no_margin flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2u2hjja-3878d9a2fe5c9480944d5307c41481a8\">\n.avia-image-container.av-2u2hjja-3878d9a2fe5c9480944d5307c41481a8 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-2u2hjja-3878d9a2fe5c9480944d5307c41481a8 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-2u2hjja-3878d9a2fe5c9480944d5307c41481a8 av-styling- avia-align-center  avia-builder-el-1  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-74339 avia-img-lazy-loading-not-74339 avia_image ' src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-400x400.png\" alt='' title='US_vitaminD_transparent_v2'  height=\"400\" width=\"400\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-400x400.png 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-835x835.png 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-80x80.png 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-768x768.png 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-1536x1536.png 1536w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-36x36.png 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-180x180.png 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-1500x1500.png 1500w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2-705x705.png 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/US_vitaminD_transparent_v2.png 2000w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2lfgp46-f9a9bbb5b4b8ec0ab1e6b9e2c69141e9\">\n.flex_column.av-2lfgp46-f9a9bbb5b4b8ec0ab1e6b9e2c69141e9{\nborder-radius:0px 0px 0px 0px;\npadding:30px 30px 30px 30px;\nbackground-color:#e8e8e8;\n}\n<\/style>\n<div  class='flex_column av-2lfgp46-f9a9bbb5b4b8ec0ab1e6b9e2c69141e9 av_two_third  avia-builder-el-2  el_after_av_one_third  el_before_av_textblock  no_margin flex_column_table_cell av-equal-height-column av-align-middle  '     ><section  class='av_textblock_section av-22thm2u-5d045d60c2804e393c2ad8db57ae32b8 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 style=\"padding-left: 30px;\">Vitamin D d\u2019USANA<\/h3>\n<p style=\"padding-left: 50px;\">Favorisez votre mieux-\u00eatre au quotidien ainsi que la force et la sant\u00e9 de votre organisme avec un suppl\u00e9ment de vitamine D<sub>3 <\/sub>aussi dot\u00e9 d&#8217;une forte teneur en vitamine K<sub>2<\/sub>.*<\/p>\n<\/div><\/section><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv70ygc-16e684f98cb0529b556cde68d89cc163 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2>Un moyen simple de faire le plein de soleil<\/h2>\n<p>Le soleil. Aussi vrai qu\u2019il nourrit l\u2019\u00e2me, il le fait aussi pour le corps en l\u2019aidant \u00e0 cr\u00e9er de la <a href=\"https:\/\/askthescientists.com\/fr\/qa\/vitamins\/#VITAMINE_D_CALCIFEROL\">vitamine D<\/a>. Toutefois, si vous voulez que tout votre approvisionnement en vitamine D provienne du soleil, il vous faudra une d\u00e9termination \u00e0 toute \u00e9preuve. En premier lieu, assurez-vous de vivre pr\u00e8s de l\u2019\u00e9quateur pendant la plus grande partie de l\u2019ann\u00e9e pour b\u00e9n\u00e9ficier d\u2019un rayonnement solaire optimal. Ensuite, passez au moins 10 \u00e0 15 minutes \u00e0 l&#8217;ext\u00e9rieur entre 10 h et 15 h un jour sur deux, en exposant le plus possible votre peau au soleil. Laissez tomber l&#8217;\u00e9cran solaire, mais \u00e9vitez aussi le coup de soleil qui endommagerait votre peau.<\/p>\n<p>Compliqu\u00e9, n&#8217;est-ce pas? Vous avez des choses \u00e0 faire, des endroits o\u00f9 aller et des gens \u00e0 voir. Alors, simplifiez-vous la vie \u2013 habillez-vous, appliquez <a href=\"https:\/\/askthescientists.com\/fr\/protecting-skin-sun\/\">chaque jour un \u00e9cran solaire<\/a> et nourrissez votre organisme en prenant Vitamin D d\u2019USANA\u00a0toute l\u2019ann\u00e9e.*<\/p>\n<p>Il y a fort \u00e0 parier que vous devrez ajouter un suppl\u00e9ment \u00e0 votre dose de soleil. Une personne sur deux dans le monde souffre d\u2019une carence et ce pourrait \u00eatre vous. Il est important que votre apport en vitamine D soit suffisant, car c\u2019est un nutriment essentiel que l\u2019on associe \u00e0 la pr\u00e9servation de la sant\u00e9 \u00e0 bien des \u00e9gards. En effet, la vitamine D\u00a0:<\/p>\n<ul>\n<li>pr\u00e9serve une sant\u00e9 et une fonction cellulaires normales*<\/li>\n<li>favorise la min\u00e9ralisation et la croissance des os et des dents*<\/li>\n<li>favorise la force et la coordination musculaires*<\/li>\n<li>contribue \u00e0 un fonctionnement immunitaire robuste et \u00e9quilibr\u00e9*<\/li>\n<\/ul>\n<p>On a \u00e9tabli un lien entre la prise de suppl\u00e9ments de vitamine D et la sant\u00e9 \u00e0 long terme.\u00a0 La formule de Vitamin D d\u2019USANA comporte aussi un autre bienfait capital pour un \u00e9tat de bien-\u00eatre \u00e0 vie\u00a0: le produit est particuli\u00e8rement bon pour le c\u0153ur en raison de sa forte teneur en <a href=\"https:\/\/askthescientists.com\/fr\/qa\/vitamins\/\">vitamine K<sub>2<\/sub><\/a>, un nutriment important pour la sant\u00e9 cardiovasculaire.*<\/p>\n<p>Si vous passez beaucoup de temps dehors \u00e0 vous exposer au soleil, il se peut que la plupart du temps, vous n\u2019ayez pas besoin d\u2019un suppl\u00e9ment de vitamine D en plus de votre multivitamine r\u00e9guli\u00e8re. Par contre, si comme la plupart des gens, vous n\u2019obtenez pas la dose de soleil voulue tous les jours, essayez de <a href=\"https:\/\/askthescientists.com\/fr\/outdoors\/\">passer plus de temps dans la nature<\/a>, tout en prenant Vitamin D d\u2019USANA comme source personnelle d&#8217;ensoleillement.<\/p>\n<p style=\"text-align: center;\"><a class=\"shop-link\" href=\"https:\/\/www.usana.com\/ux\/cart\/en-US\/so\/PHX-URL\/my_associates_id\/109.010101?utm_source=ATS&utm_medium=socialsharing\" target=\"blank\">Achetez Ici<\/a><\/p>\n\n<\/div><\/section>\n<div class='flex_column_table av-jmv9a0rt-f518e1a3ae0cc32d199367fe416af3a8 sc-av_two_third av-equal-height-column-flextable'><div  class='flex_column av-jmv9a0rt-f518e1a3ae0cc32d199367fe416af3a8 av_two_third  avia-builder-el-5  el_after_av_textblock  el_before_av_one_third  first no_margin flex_column_table_cell av-equal-height-column av-align-middle  column-top-margin'     ><section  class='av_textblock_section av-jmv74fwk-16cad40df399578b531d8e20c049e6ef '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>Des perspectives plut\u00f4t sombres pour l&#8217;apport en vitamine D<\/strong><\/h2>\n<\/div><\/section><\/div>\n<div  class='flex_column av-xtobra-f8960f80529b8ae90ff956dd3ace4c82 av_one_third  avia-builder-el-7  el_after_av_two_third  el_before_av_textblock  no_margin flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jmv7532d-e43877c956f8f85babd10b125cc454bd\">\n.avia-image-container.av-jmv7532d-e43877c956f8f85babd10b125cc454bd img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-jmv7532d-e43877c956f8f85babd10b125cc454bd .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-jmv7532d-e43877c956f8f85babd10b125cc454bd av-styling- avia-align-center  avia-builder-el-8  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-27671 avia-img-lazy-loading-not-27671 avia_image ' src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Not-a-Sunny-Outlook-Vitamin-D.jpg\" alt='' title='Not a Sunny Outlook Vitamin D'  height=\"400\" width=\"400\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Not-a-Sunny-Outlook-Vitamin-D.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Not-a-Sunny-Outlook-Vitamin-D-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Not-a-Sunny-Outlook-Vitamin-D-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Not-a-Sunny-Outlook-Vitamin-D-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Not-a-Sunny-Outlook-Vitamin-D-120x120.jpg 120w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv7c3y4-b24853468b9a57166a788671d2f25b2b '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>L\u2019\u00e9tat de la vitamine D est un facteur de pr\u00e9servation de la sant\u00e9. Cependant, la carence et un apport insuffisant de cette vitamine sont chose courante. Des rapports ne cessent de montrer que des populations partout dans le monde ont une carence en vitamine D. Aux \u00c9tats-Unis seulement, l&#8217;apport quotidien en vitamine D est insuffisant pour les deux tiers de la population.<\/p>\n<p>D\u00e9j\u00e0 fort r\u00e9pandu, le probl\u00e8me prend de l\u2019ampleur et ses r\u00e9percussions sur l\u2019\u00e9tat de sant\u00e9 g\u00e9n\u00e9ral pourraient \u00eatre tr\u00e8s s\u00e9rieuses. Un lien a \u00e9t\u00e9 \u00e9tabli entre les faibles niveaux de vitamine D et divers probl\u00e8mes caus\u00e9s par une mauvaise sant\u00e9 chez des populations partout dans le monde.<\/p>\n<p>Un certain nombre de facteurs contribuent \u00e0 des niveaux trop faibles de vitamine D\u00a0:<\/p>\n<p><strong>Une exposition insuffisante au soleil <\/strong><\/p>\n<p>L\u2019\u00eatre humain a connu son \u00e9volution dans la nature, sans cesse expos\u00e9 au soleil. Son organisme a donc acquis la capacit\u00e9 de convertir les rayons ultraviolets (UVB) en une substance vitale agissant comme une vitamine et une hormone pour favoriser la sant\u00e9\u00a0: la vitamine D.<\/p>\n<p>Dans notre monde moderne, les contextes favorables \u00e0 une exposition au soleil sont malheureusement plus rares. Les gens passent de plus en plus de temps \u00e0 l\u2019int\u00e9rieur. La peur du cancer de la peau et du vieillissement pr\u00e9matur\u00e9 les incite \u00e0 porter un \u00e9cran solaire et \u00e0 bien se couvrir \u00e0 l\u2019ext\u00e9rieur. Cette exposition insuffisante au soleil explique la baisse notable du taux de vitamine D naturelle.<\/p>\n<p><strong>Le lieu de r\u00e9sidence<\/strong><\/p>\n<p>Rep\u00e9rez l\u2019\u00e9quateur sur un globe terrestre. Plus notre lieu de r\u00e9sidence s\u2019en \u00e9loigne, plus il est difficile pour notre organisme d\u2019utiliser la lumi\u00e8re du soleil pour produire de la vitamine D. C\u2019est alors la perc\u00e9e plus angulaire du soleil qui, une fois encore, bloque la travers\u00e9e de l\u2019atmosph\u00e8re par une plus grande quantit\u00e9 de rayons UVB, surtout en hiver. La pollution est un autre facteur qui influe sur la quantit\u00e9 de rayons UVB qui peut atteindre notre peau.<strong><em>\u00a0<\/em><\/strong><\/p>\n<p><strong>L&#8217;heure du jour et le temps de l&#8217;ann\u00e9e<\/strong><\/p>\n<p>En automne et en hiver, l\u2019angle du soleil entra\u00eene une diminution de la quantit\u00e9 de rayons UVB qui traversent l\u2019atmosph\u00e8re. Le processus se r\u00e9p\u00e8te dans les premi\u00e8res et derni\u00e8res heures de la journ\u00e9e. Plus l\u2019heure du midi approche, plus le corps re\u00e7oit de rayons UVB.<\/p>\n<p>Pour le v\u00e9rifier, il suffit de mesurer la longueur de l\u2019ombre que nous projetons en nous tenant debout \u00e0 l\u2019ext\u00e9rieur. Si l\u2019ombre d\u2019une personne d\u00e9passe sa taille, une quantit\u00e9 r\u00e9duite de rayons UVB atteint le corps et par cons\u00e9quent, la production de vitamine D diminue.<strong>\u00a0<img decoding=\"async\" class=\"aligncenter size-medium wp-image-27679\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-levels-vary-by-time-of-year-400x230.jpg\" alt=\"\" width=\"400\" height=\"230\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-levels-vary-by-time-of-year-400x230.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-levels-vary-by-time-of-year-768x441.jpg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-levels-vary-by-time-of-year.jpg 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-levels-vary-by-time-of-year-705x405.jpg 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-levels-vary-by-time-of-year-450x259.jpg 450w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/strong><\/p>\n<p><strong>L&#8217;\u00e2ge<\/strong><\/p>\n<p>Outre le fait que les personnes \u00e2g\u00e9es passent g\u00e9n\u00e9ralement plus de temps \u00e0 l\u2019int\u00e9rieur, en raison de leur mobilit\u00e9 r\u00e9duite,\u00a0 la corr\u00e9lation entre l\u2019\u00e2ge et la carence en vitamine D s\u2019\u00e9tablit de deux fa\u00e7ons.\u00a0 D\u2019abord, avec l&#8217;\u00e2ge, la peau perd en partie sa capacit\u00e9 d\u2019absorption de la vitamine D. Ensuite, les reins\u00a0 deviennent de moins en moins efficaces \u00e0 convertir la vitamine D provenant du soleil en une forme utilis\u00e9e par l\u2019organisme.\u00a0<strong>\u00a0<\/strong><\/p>\n<p><strong>La couleur de la peau<\/strong><\/p>\n<p>Les personnes \u00e0 la peau plus fonc\u00e9e courent un risque accru de carence en vitamine D, car il y a une corr\u00e9lation directe entre la pigmentation de la peau et la production de vitamine D par l\u2019organisme. Certaines \u00e9tudes laissent supposer que pour produire une quantit\u00e9 comparable de vitamine D, une peau plus fonc\u00e9e devrait \u00eatre expos\u00e9e 10 fois plus longtemps au soleil qu\u2019une peau plus p\u00e2le.<\/p>\n<p><strong>L&#8217;exc\u00e8s de poids<\/strong><\/p>\n<p>La vitamine D est liposoluble \u2014 autrement dit, ce sont les lipides dans l\u2019organisme qui la recueillent et l\u2019emmagasinent. L\u2019exc\u00e8s de poids s\u2019accompagne d\u2019un exc\u00e9dent de lipides qui doit absorber une quantit\u00e9 \u00e9quivalente de vitamine D. L\u2019apport n\u00e9cessaire en vitamine D d\u00e9passe ainsi celui exig\u00e9 quand le pourcentage de gras corporel est plus faible.<\/p>\n<p><strong>Les troubles intestinaux<\/strong><\/p>\n<p>Certains troubles intestinaux nuisant \u00e0 l\u2019absorption des gras peuvent aussi r\u00e9duire l\u2019absorption de vitamine D.<\/p>\n<p>Ajout\u00e9s \u00e0 votre r\u00e9gime alimentaire quotidien, certains aliments peuvent vous procurer de la vitamine D : poisson gras (saumon et truite), lait (de vache, d\u2019amande ou de soja), yogourt, jaune d\u2019\u0153uf, c\u00e9r\u00e9ales et jus d\u2019orange enrichis. Cependant, ces sources contiennent une quantit\u00e9 plut\u00f4t faible de vitamine D.<\/p>\n<p>Il est difficile de s\u2019exposer suffisamment au soleil pour permettre \u00e0 l\u2019organisme de produire de la vitamine D. En fonction de vos habitudes, il se peut que votre r\u00e9gime alimentaire quotidien ne vous assure pas non plus un apport suffisant. Heureusement, vos perspectives \u00e0 cet \u00e9gard peuvent s\u2019am\u00e9liorer, puisque la plupart des sp\u00e9cialistes s\u2019entendent\u00a0: la prise de suppl\u00e9ments est un moyen sens\u00e9 et s\u00fbr d\u2019accro\u00eetre votre apport de vitamine D.*<\/p>\n<p style=\"text-align: center;\"><a class=\"shop-link\" href=\"https:\/\/www.usana.com\/ux\/cart\/en-US\/so\/PHX-URL\/my_associates_id\/109.010101?utm_source=ATS&utm_medium=socialsharing\" target=\"blank\">Achetez Ici<\/a><\/p>\n<\/div><\/section>\n<div class='flex_column_table av-jmv99hlq-0be14422598ea0e50740b9f612993cae sc-av_two_third av-equal-height-column-flextable'><div  class='flex_column av-jmv99hlq-0be14422598ea0e50740b9f612993cae av_two_third  avia-builder-el-10  el_after_av_textblock  el_before_av_one_third  first no_margin flex_column_table_cell av-equal-height-column av-align-middle  column-top-margin'     ><section  class='av_textblock_section av-jmv7e1eg-175973773898dc814ab8ca6c258739a8 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>Laissez entrer le soleil tout l\u2019ann\u00e9e avec Vitamin D d\u2019USANA<\/strong><\/h2>\n<\/div><\/section><\/div>\n<div  class='flex_column av-93b09ie-010de5532d8dc8c05db1f513e59417f7 av_one_third  avia-builder-el-12  el_after_av_two_third  el_before_av_textblock  no_margin flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  column-top-margin'     ><div  class='avia-image-container av-jmv7he9c-806f4afa45bd085bf99904fd4634597d av-styling- avia-align-center  avia-builder-el-13  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-74352 avia-img-lazy-loading-not-74352 avia_image ' src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-400x400.jpg\" alt='' title='109.010102-VitaminD-US'  height=\"400\" width=\"400\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-400x400.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-835x835.jpg 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-768x768.jpg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-1536x1536.jpg 1536w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-1500x1500.jpg 1500w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US-705x705.jpg 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/109.010102-VitaminD-US.jpg 2000w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv7jvrp-76ca92ae6eb774783ed2c8d6609d0143 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>M\u00eame si un apport de 50 microgrammes (mcg) peut para\u00eetre n\u00e9gligeable, pour l\u2019obtenir, vous devrez consommer plus de 14 tasses de lait ou quatre portions de saumon par jour\u2026 alors qu&#8217;un seul comprim\u00e9 de Vitamin D d\u2019USANA vous le procure.*<\/p>\n<p>Mieux encore, comme le suppl\u00e9ment Vitamin D d\u2019USANA est une excellente source de la forme la plus utile de vitamine D \u2013 le chol\u00e9calcif\u00e9rol (vitamine D<sub>3<\/sub>) \u2013 c\u2019est un produit de choix qui aide \u00e0 \u00e9viter la carence. Les recherches laissent entendre que la vitamine D<sub>3<\/sub> est sup\u00e9rieure \u00e0 l\u2019ergocalcif\u00e9rol (vitamine D<sub>2<\/sub>) lorsqu&#8217;il s&#8217;agit d&#8217;accro\u00eetre le taux sanguin de vitamine D active. Une \u00e9tude clinique men\u00e9e par les scientifiques d\u2019USANA vient confirmer cet accroissement. Les r\u00e9sultats de l\u2019\u00e9tude indiquent que les sujets ayant pris les multivitamines ou Vitamin D d\u2019USANA ont six fois plus de chances d\u2019avoir un taux optimal de vitamine D.*<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-27701\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-is-your-own-sunshine-400x230.jpg\" alt=\"\" width=\"400\" height=\"230\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-is-your-own-sunshine-400x230.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-is-your-own-sunshine-768x441.jpg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-is-your-own-sunshine.jpg 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-is-your-own-sunshine-705x405.jpg 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-is-your-own-sunshine-450x259.jpg 450w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Vitamin D d\u2019USANA est aussi enrichi d\u2019un autre nutriment qui peut manquer dans votre alimentation quotidienne\u00a0: la vitamine K<sub>2<\/sub>. Celle-ci agit avec la vitamine D pour assurer une utilisation ad\u00e9quate du calcium par l\u2019organisme, ce qui favorise la sant\u00e9 cardiovasculaire et squelettique.*<\/p>\n<p>Un comprim\u00e9 renferme 30 mcg de vitamine K<sub>2<\/sub> de types m\u00e9naquinone-4 (MK-4) et m\u00e9naquinone-7 (MK-7). ( M\u00e9naquinone suivi d\u2019un chiffre d\u00e9crit simplement des sous-types de mol\u00e9cules de vitamine K aux structures l\u00e9g\u00e8rement diff\u00e9rentes.) En fournissant ces deux types de vitamine K, le produit vous procure des bienfaits similaires \u00e0 ceux que vous obtenez d\u2019un r\u00e9gime alimentaire vari\u00e9.<\/p>\n<p>La vitamine K de forme MK-4 provient de sources animales\u00a0comme le beurre, le foie et les \u0153ufs. De plus, votre organisme synth\u00e9tise une petite quantit\u00e9 de la vitamine K<sub>1<\/sub> sous la forme MK-4 <sub>\u00a0<\/sub>(provenant de l\u00e9gumes feuillus verts).<\/p>\n<p>La forme MK-7 de la vitamine K est tir\u00e9e d\u2019aliments ferment\u00e9s g\u00e9n\u00e9ralement plus populaires dans les cultures asiatiques, comme le natto, un aliment ferment\u00e9 japonais \u00e0 base de soja. D\u2019une puret\u00e9 exceptionnelle, la MK-7 utilis\u00e9e dans Vitamin D est con\u00e7ue express\u00e9ment pour \u00eatre\u00a0 identique aux mol\u00e9cules actives que l\u2019on trouve dans la nature, ce qui contribue \u00e0 une efficacit\u00e9 durable.*<\/p>\n<p style=\"text-align: center;\"><a class=\"shop-link\" href=\"https:\/\/www.usana.com\/ux\/cart\/en-US\/so\/PHX-URL\/my_associates_id\/109.010101?utm_source=ATS&utm_medium=socialsharing\" target=\"blank\">Achetez Ici<\/a><\/p>\n<\/div><\/section>\n<div class='flex_column_table av-jmv98v0k-5fa66badb6605f3a74e57aec903c0e0f sc-av_two_third av-equal-height-column-flextable'><div  class='flex_column av-jmv98v0k-5fa66badb6605f3a74e57aec903c0e0f av_two_third  avia-builder-el-15  el_after_av_textblock  el_before_av_one_third  first no_margin flex_column_table_cell av-equal-height-column av-align-middle  column-top-margin'     ><section  class='av_textblock_section av-jmv7kxf8-a59a4feb487283091cc603ba49095f08 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>Un des nombreux bienfaits de Vitamin D : la sant\u00e9 cellulaire<\/strong><\/h2>\n<\/div><\/section><\/div>\n<div  class='flex_column av-8pzhqw6-6f0ea2c08e9c7fdcef5cb0e26bd055f1 av_one_third  avia-builder-el-17  el_after_av_two_third  el_before_av_textblock  no_margin flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jmv7lnu7-81b09c03ba3a63393b0fa7e0dd8a48d4\">\n.avia-image-container.av-jmv7lnu7-81b09c03ba3a63393b0fa7e0dd8a48d4 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-jmv7lnu7-81b09c03ba3a63393b0fa7e0dd8a48d4 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-jmv7lnu7-81b09c03ba3a63393b0fa7e0dd8a48d4 av-styling- avia-align-center  avia-builder-el-18  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-27715 avia-img-lazy-loading-not-27715 avia_image ' src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-your-overall-cell-health.jpg\" alt='' title='Vitamin D for your overall cell health'  height=\"400\" width=\"400\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-your-overall-cell-health.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-your-overall-cell-health-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-your-overall-cell-health-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-your-overall-cell-health-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-your-overall-cell-health-120x120.jpg 120w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv7plak-70a5cfd332c8fc4be86b16c76a9b65da '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>USANA classe \u00e0 juste titre Vitamin D dans la cat\u00e9gorie \u00ab sant\u00e9 cellulaire \u00bb, en raison des r\u00e9cepteurs de la vitamine D que poss\u00e8dent bon nombre de tissus et cellules dont le fonctionnement ad\u00e9quat requiert cette vitamine.*<\/p>\n<p>La vitamine D se distingue de toutes les autres en raison des conversions qu\u2019elle subit dans l&#8217;organisme. D\u2019abord, la 25-hydroxyvitamine D (ou 25(OH)D) est produite par une r\u00e9action entre la vitamine D<sub>3<\/sub> provenant de votre peau ou de votre alimentation et des enzymes h\u00e9patiques. Qualifi\u00e9e de prohormone, cette forme est en fait un pr\u00e9curseur d\u2019une <a href=\"https:\/\/askthescientists.com\/fr\/hormones\/\">hormone<\/a> qui devient active apr\u00e8s sa m\u00e9tabolisation.<\/p>\n<p>D\u00e8s que votre organisme en a besoin, il convertit ensuite la 25(OH)D en une forme active de la vitamine D appel\u00e9e calcitriol ou 1,25-dihydroxyvitamine D (1\u03b1,25(OH)<sub>2<\/sub>D<sub>3<\/sub>). (Pour simplifier les choses, nous nous nous en tiendrons \u00e0 l&#8217;appellation \u00ab vitamine D \u00bb ou \u00abvitamine D active \u00bb.)<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-27969\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-metabolism-simplified-400x283.jpg\" alt=\"\" width=\"400\" height=\"283\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-metabolism-simplified-400x283.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-metabolism-simplified-768x543.jpg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-metabolism-simplified-835x590.jpg 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-metabolism-simplified-260x185.jpg 260w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-metabolism-simplified-705x498.jpg 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-metabolism-simplified-450x318.jpg 450w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-metabolism-simplified.jpg 1191w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Votre organisme contr\u00f4le \u00e9troitement le taux circulant de vitamine D active. Par contre, un suppl\u00e9ment peut contribuer \u00e0 rendre disponible au besoin une bonne quantit\u00e9 de 25(OH)D \u00e0 des fins de conversion sous sa forme active. Et votre organisme en a grand besoin, car les hormones de vitamine D active influent sur bon nombre d\u2019activit\u00e9s biologiques en envoyant des messages via les sites r\u00e9cepteurs.<\/p>\n<p>Des douzaines de tissus sont dot\u00e9s de r\u00e9cepteurs de vitamine D, y compris (mais sans s\u2019y limiter) dans les cellules des tissus suivants\u00a0:<\/p>\n<ul>\n<li>Peau<\/li>\n<li>Muscles<\/li>\n<li>Glande thyro\u00efde<\/li>\n<li>Cerveau et syst\u00e8me nerveux central<\/li>\n<li>Glandes surr\u00e9nales<\/li>\n<li>C\u00f4lon<\/li>\n<li>Prostate<\/li>\n<li>Seins<\/li>\n<\/ul>\n<p>On estime que la vitamine D\u00a0r\u00e9gule aussi entre 200 et 300 g\u00e8nes.<\/p>\n<p>L\u2019influence de la vitamine D est pr\u00e9valente dans l\u2019organisme, ce qui explique qu\u2019elle soit associ\u00e9e \u00e0 de tr\u00e8s nombreuses incidences en mati\u00e8re de sant\u00e9. Des travaux de recherche sont activement men\u00e9s afin de d\u00e9terminer l\u2019ampleur de ces diff\u00e9rents liens avec la carence en vitamine D. La science reconna\u00eet aujourd\u2019hui l\u2019influence de la vitamine D sur de nombreux syst\u00e8mes de l\u2019organisme, celle exerc\u00e9e sur le syst\u00e8me squelettique \u00e9tant la plus \u00e9tudi\u00e9e.*<\/p>\n<p style=\"text-align: center;\"><a class=\"shop-link\" href=\"https:\/\/www.usana.com\/ux\/cart\/en-US\/so\/PHX-URL\/my_associates_id\/109.010101?utm_source=ATS&utm_medium=socialsharing\" target=\"blank\">Achetez Ici<\/a><\/p>\n<\/div><\/section>\n<div class='flex_column_table av-jmv98ayz-05941a82e47f1c83b618284e2ffcd74e sc-av_two_third av-equal-height-column-flextable'><div  class='flex_column av-jmv98ayz-05941a82e47f1c83b618284e2ffcd74e av_two_third  avia-builder-el-20  el_after_av_textblock  el_before_av_one_third  first no_margin flex_column_table_cell av-equal-height-column av-align-middle  column-top-margin'     ><section  class='av_textblock_section av-jmv7rfkp-0e8a6b8350b4663f75bd8e41b0ce7e14 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>Aidez \u00e0 pr\u00e9server la r\u00e9sistance de votre syst\u00e8me squelettique avec Vitamin D<\/strong><\/h2>\n<\/div><\/section><\/div>\n<div  class='flex_column av-7xcpz9i-2c13e23496b8cc2adfc07f62622b8938 av_one_third  avia-builder-el-22  el_after_av_two_third  el_before_av_textblock  no_margin flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jmv7sfiy-d864eb15d8dfa32e70f9e3e3acbd4665\">\n.avia-image-container.av-jmv7sfiy-d864eb15d8dfa32e70f9e3e3acbd4665 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-jmv7sfiy-d864eb15d8dfa32e70f9e3e3acbd4665 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-jmv7sfiy-d864eb15d8dfa32e70f9e3e3acbd4665 av-styling- avia-align-center  avia-builder-el-23  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-27737 avia-img-lazy-loading-not-27737 avia_image ' src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-strong-body-bones.jpg\" alt='' title='Vitamin D for strong body bones'  height=\"400\" width=\"400\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-strong-body-bones.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-strong-body-bones-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-strong-body-bones-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-strong-body-bones-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-strong-body-bones-120x120.jpg 120w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv7vb2t-da0a7b45fa1c52d4982046cefac09107 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>On ne peut \u00e9voquer la sant\u00e9 des os et des dents sans songer au <a href=\"https:\/\/askthescientists.com\/fr\/qa\/minerals\/#CALCIUM\">calcium<\/a>. Il est largement reconnu comme un constituant incontournable d\u2019un squelette robuste. Pourtant, l\u2019importance d\u2019autres nutriments est aussi ind\u00e9niable.<\/p>\n<p>Les vitamines D et K sont deux nutriments essentiels pour att\u00e9nuer la perte osseuse li\u00e9e \u00e0 l\u2019\u00e2ge et pour pr\u00e9server la masse osseuse. Il faut donc en avoir un excellent apport pendant toute la vie. Avec l\u2019\u00e2ge, il devient particuli\u00e8rement important de conserver un squelette r\u00e9sistant et robuste, afin de rester stable en position debout.*<\/p>\n<p>La vitamine D agit en contribuant \u00e0 l\u2019absorption du calcium et du phosphore par l\u2019intestin. La vitamine K aide aussi \u00e0 l\u2019utilisation ad\u00e9quate du calcium par l\u2019organisme en participant \u00e0 l\u2019activation de l\u2019ost\u00e9ocalcine, une hormone qui extrait le calcium du sang pour le lier aux os.*<\/p>\n<p>La vitamine soleil ne se contente pas de transporter le calcium vers les os. En effet, la vitamine D amorce le processus d\u2019extraction du calcium de vos os s\u2019il est absent de votre r\u00e9gime alimentaire et que votre organisme en r\u00e9clame.*<\/p>\n<p>Au-del\u00e0 de la sant\u00e9 osseuse, on a associ\u00e9 la carence en vitamine D \u00e0 la faiblesse et \u00e0 une mobilit\u00e9 articulaire r\u00e9duite. On a aussi montr\u00e9 que la vitamine D est b\u00e9n\u00e9fique \u00e0 la r\u00e9cup\u00e9ration musculaire apr\u00e8s un exercice intensif. Les nutriments contenus dans Vitamin D d\u2019USANA peuvent aussi favoriser un bon fonctionnement des muscles et des articulations, procurant ainsi au squelette un soutien complet.*<\/p>\n<p style=\"text-align: center;\"><a class=\"shop-link\" href=\"https:\/\/www.usana.com\/ux\/cart\/en-US\/so\/PHX-URL\/my_associates_id\/109.010101?utm_source=ATS&utm_medium=socialsharing\" target=\"blank\">Achetez Ici<\/a><\/p>\n<\/div><\/section>\n<div class='flex_column_table av-jmv97q92-465ef7c9e572f6011d8629958d790d12 sc-av_two_third av-equal-height-column-flextable'><div  class='flex_column av-jmv97q92-465ef7c9e572f6011d8629958d790d12 av_two_third  avia-builder-el-25  el_after_av_textblock  el_before_av_one_third  first no_margin flex_column_table_cell av-equal-height-column av-align-middle  column-top-margin'     ><section  class='av_textblock_section av-jmv7wpud-fcfefb735332f2fdbf5d6bd3e02f57e5 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>La vitamine K<sub>2<\/sub>\u00a0: excellente pour votre sant\u00e9 cardiovasculaire<\/strong><\/h2>\n<\/div><\/section><\/div>\n<div  class='flex_column av-7lekap2-d1903b1a42ea153b0112bb40b9d359b6 av_one_third  avia-builder-el-27  el_after_av_two_third  el_before_av_textblock  no_margin flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jmv7xeuy-356149c03b123749811224f2ddbafe4c\">\n.avia-image-container.av-jmv7xeuy-356149c03b123749811224f2ddbafe4c img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-jmv7xeuy-356149c03b123749811224f2ddbafe4c .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-jmv7xeuy-356149c03b123749811224f2ddbafe4c av-styling- avia-align-center  avia-builder-el-28  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-27748 avia-img-lazy-loading-not-27748 avia_image ' src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-cardiovascular-health.jpg\" alt='' title='Vitamin D for cardiovascular health'  height=\"400\" width=\"400\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-cardiovascular-health.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-cardiovascular-health-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-cardiovascular-health-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-cardiovascular-health-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-cardiovascular-health-120x120.jpg 120w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv7yt85-837fbb66946dcdf774c8d4d023a72ea1 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Des travaux de recherche ont permis d\u2019\u00e9tablir un lien entre un taux suffisant de vitamine D et la sant\u00e9 cardiaque. La vitamine K<sub>2<\/sub> que renferme Vitamin D d\u2019USANA joue aussi un r\u00f4le dans un processus important qui peut \u00eatre b\u00e9n\u00e9fique pour votre c\u0153ur. Elle active le g\u00e8ne de la prot\u00e9ine matricielle GLA (MGA). La production de MGA est n\u00e9cessaire, car celle-ci tient lieu d&#8217;enseigne de \u00ab sens interdit \u00bb. \u00c0 l\u2019inverse de l\u2019hormone ost\u00e9ocalcine qui incorpore le calcium dans vos os, la prot\u00e9ine MGA \u00e9loigne ce min\u00e9ral des sites o\u00f9 il est ind\u00e9sirable\u00a0: vos tissus mous. Comme ce processus favorise la sant\u00e9 des vaisseaux sanguins et, par cons\u00e9quent, un d\u00e9bit sanguin normal, la vitamine K joue ainsi un r\u00f4le important dans la pr\u00e9servation de la sant\u00e9 cardiovasculaire.*<\/p>\n<p>Un lien a aussi \u00e9t\u00e9 \u00e9tabli entre la vitamine K<sub>2<\/sub> et une bonne fonction endoth\u00e9liale, un facteur important de la <a href=\"https:\/\/askthescientists.com\/fr\/cardiovascular-system\/\">sant\u00e9 cardiovasculaire<\/a>.*<\/p>\n<p style=\"text-align: center;\"><a class=\"shop-link\" href=\"https:\/\/www.usana.com\/ux\/cart\/en-US\/so\/PHX-URL\/my_associates_id\/109.010101?utm_source=ATS&utm_medium=socialsharing\" target=\"blank\">Achetez Ici<\/a><\/p>\n<\/div><\/section>\n<div class='flex_column_table av-jmv976n4-6ac8f0cf9c915bcf7f6c050d2405ba4f sc-av_two_third av-equal-height-column-flextable'><div  class='flex_column av-jmv976n4-6ac8f0cf9c915bcf7f6c050d2405ba4f av_two_third  avia-builder-el-30  el_after_av_textblock  el_before_av_one_third  first no_margin flex_column_table_cell av-equal-height-column av-align-middle  column-top-margin'     ><section  class='av_textblock_section av-jmv7zym1-43500c0bfedfb336369b31f673d08409 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>La vitamine D\u00a0: la cl\u00e9 de votre immunit\u00e9<\/strong><\/h2>\n<\/div><\/section><\/div>\n<div  class='flex_column av-78lqsh2-4340d97f727ea0c1a26d1a5654d307f5 av_one_third  avia-builder-el-32  el_after_av_two_third  el_before_av_textblock  no_margin flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jmv80lau-fdb491e8a98047c2c36232de595c1473\">\n.avia-image-container.av-jmv80lau-fdb491e8a98047c2c36232de595c1473 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-jmv80lau-fdb491e8a98047c2c36232de595c1473 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-jmv80lau-fdb491e8a98047c2c36232de595c1473 av-styling- avia-align-center  avia-builder-el-33  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-27759 avia-img-lazy-loading-not-27759 avia_image ' src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-immunity.jpg\" alt='' title='Vitamin D for immunity'  height=\"400\" width=\"400\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-immunity.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-immunity-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-immunity-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-immunity-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/Vitamin-D-for-immunity-120x120.jpg 120w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv872v1-d29ac33dbac399a1e095518ff518f485 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Que ce soit pendant les longues journ\u00e9es d\u2019\u00e9t\u00e9 ou les jours raccourcis de l\u2019hiver, le rythme de la vie ne cesse de s&#8217;acc\u00e9l\u00e9rer. Aucun r\u00e9pit non plus pour votre syst\u00e8me immunitaire. Vitamin D d\u2019USANA peut vous aider \u00e0 rester en forme pour suivre ce rythme acc\u00e9l\u00e9r\u00e9\u2026 quelle que soit la saison.<\/p>\n<p>La vitamine D favorise la sant\u00e9 et l\u2019\u00e9quilibre du syst\u00e8me immunitaire. Elle agit dans tout l\u2019organisme pour en pr\u00e9server le bon fonctionnement, y compris dans certaines zones que vous n\u2019associez sans doute pas \u00e0 l\u2019immunit\u00e9, comme la peau. Le r\u00f4le principal de la vitamine D dans la fonction immunitaire est de r\u00e9guler et diff\u00e9rencier les cellules du syst\u00e8me immunitaire. Autrement dit, elle aide \u00e0 cr\u00e9er des cellules immunitaires sp\u00e9cialis\u00e9es.*<\/p>\n<p>La vitamine D contribue aussi \u00e0 contr\u00f4ler les r\u00e9ponses immunitaires par le biais de la <a href=\"https:\/\/askthescientists.com\/fr\/qa\/what-is-cell-signaling\/\">communication cellulaire<\/a>. La plupart des cellules immunitaires sont dot\u00e9es de r\u00e9cepteurs de vitamine D et quand celle-ci se lie \u00e0 des r\u00e9cepteurs cellulaires, elle envoie des messages qui favorisent bon nombre de r\u00e9ponses naturelles qui peuvent contribuer \u00e0 pr\u00e9server votre sant\u00e9. Certaines de ces r\u00e9ponses peuvent parfois amorcer la production d\u2019une quantit\u00e9 accrue de vitamine D active dans les zones o\u00f9 il le faut et au moment voulu.*<\/p>\n<p style=\"text-align: center;\"><a class=\"shop-link\" href=\"https:\/\/www.usana.com\/ux\/cart\/en-US\/so\/PHX-URL\/my_associates_id\/109.010101?utm_source=ATS&utm_medium=socialsharing\" target=\"blank\">Achetez Ici<\/a><\/p>\n<\/div><\/section>\n<div class='flex_column_table av-jmv96ljw-531b95eb2bd75043a17636a5ed1d9f62 sc-av_two_third av-equal-height-column-flextable'><div  class='flex_column av-jmv96ljw-531b95eb2bd75043a17636a5ed1d9f62 av_two_third  avia-builder-el-35  el_after_av_textblock  el_before_av_one_third  first no_margin flex_column_table_cell av-equal-height-column av-align-middle  column-top-margin'     ><section  class='av_textblock_section av-jmv89z1i-03961034f40f622011c3e3ab53956cbe '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>Quelle quantit\u00e9 de vitamine D vous faut-il?<\/strong><\/h2>\n<\/div><\/section><\/div>\n<div  class='flex_column av-6mfgskm-a94994ab12674d147d3b85f008605ed2 av_one_third  avia-builder-el-37  el_after_av_two_third  el_before_av_textblock  no_margin flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jmv8b0h2-fdbe2e94e0d36be4cf197b1627cf4066\">\n.avia-image-container.av-jmv8b0h2-fdbe2e94e0d36be4cf197b1627cf4066 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-jmv8b0h2-fdbe2e94e0d36be4cf197b1627cf4066 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-jmv8b0h2-fdbe2e94e0d36be4cf197b1627cf4066 av-styling- avia-align-center  avia-builder-el-38  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-27770 avia-img-lazy-loading-not-27770 avia_image ' src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/how-much-vitamin-D.jpg\" alt='' title='how much vitamin D'  height=\"400\" width=\"400\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/how-much-vitamin-D.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/how-much-vitamin-D-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/how-much-vitamin-D-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/how-much-vitamin-D-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/how-much-vitamin-D-120x120.jpg 120w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/div><\/div><\/div><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv8bb1y-d5a08a6a04419759da6e812f199cdf5c '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Un suppl\u00e9ment de vitamine D est essentiel en hiver, puisque vous \u00eates plus souvent \u00e0 l\u2019int\u00e9rieur et portez des v\u00eatements qui vous couvrent des pieds \u00e0 la t\u00eate. L\u2019hiver fini, votre organisme a tout de m\u00eame encore besoin de ce qui lui fait du bien. En fait, les recherches montrent que la plupart des gens n\u2019obtiennent pas autant de vitamine D par l&#8217;exposition au soleil qu\u2019ils le croient. \u00a0C\u2019est pourquoi Vitamin D d\u2019USANA est formul\u00e9 avec une quantit\u00e9 \u00e9lev\u00e9e de vitamine D pour aider \u00e0 en pr\u00e9venir la carence toute l\u2019ann\u00e9e.*<\/p>\n<\/div><\/section>\n<div  class='flex_column av-6dpemyu-526413d8025dd99a57f45b5190be2d8d av_one_half  avia-builder-el-40  el_after_av_textblock  el_before_av_one_half  first flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-jmv8f3f5-2c1afa56e420d541ad7b560f318cc5b5 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Selon de nombreux sp\u00e9cialistes, l\u2019apport quotidien recommand\u00e9 (AQR) de vitamine D diff\u00e8re sensiblement de celui que la science pr\u00e9conise. Le Food and Nutrition Board des \u00c9tats-Unis \u00e9tablit \u00e0 seulement 15 mcg (600 UI) par jour l\u2019apport recommand\u00e9 pour la plupart des adultes, quand des apports beaucoup plus \u00e9lev\u00e9s sont presque toujours n\u00e9cessaires pour obtenir une concentration optimale, c&#8217;est-\u00e0-dire de 40 \u00e0 60 ng\/ml de 25(OH)D.*<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-medium wp-image-27903\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/in-house-vitamin-D-study-FR-400x400.jpg\" alt=\"\" width=\"400\" height=\"400\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/in-house-vitamin-D-study-FR-400x400.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/in-house-vitamin-D-study-FR-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/in-house-vitamin-D-study-FR-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/in-house-vitamin-D-study-FR-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/in-house-vitamin-D-study-FR-120x120.jpg 120w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/in-house-vitamin-D-study-FR-450x450.jpg 450w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/10\/in-house-vitamin-D-study-FR.jpg 500w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Une \u00e9tude interne chez USANA a permis de conclure qu&#8217;il est n\u00e9cessaire de prendre un suppl\u00e9ment allant jusqu\u2019\u00e0 5\u00a0000 UI de vitamine D<sub>3, <\/sub>c&#8217;est-\u00e0-dire un apport quotidien d\u2019environ 125 mcg, pour obtenir un taux optimal. Cette quantit\u00e9 est conforme \u00e0 la recommandation du Vitamin D Council.*<\/p>\n<\/div><\/section><\/div>\n<div  class='flex_column av-jmv8cmiv-3fa309ffc8e8402ebd9dafab15ebb950 av_one_half  avia-builder-el-42  el_after_av_one_half  el_before_av_textblock  flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-jmv8cb4d-a26221e4ae55efe8c1636c7f51cb9c93 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>Signes de carence en vitamine D <\/strong><\/p>\n<p><strong>\u00a0<\/strong>Pour conna\u00eetre avec certitude l\u2019\u00e9tat de votre vitamine D, il faut en faire le test. Voici quelques signes que vous pourriez remarquer en cas de carence en vitamine D :<\/p>\n<p><strong>Sensation de fatigue<\/strong><\/p>\n<p>Il semble qu\u2019un faible apport en vitamine D influe sensiblement sur l\u2019humeur.\u00a0 L\u2019exposition au soleil ou \u00e0 une lumi\u00e8re vive am\u00e8ne le cerveau \u00e0 produire de la s\u00e9rotonine \u00e0 un rythme plus rapide \u2013 une hormone qui influe sur l\u2019humeur.<\/p>\n<p><strong>\u00a0<\/strong><strong>Douleur osseuse et articulaire<\/strong><\/p>\n<p>Bon nombre de gens qui souffrent \u00e0 leur insu d\u2019une carence en vitamine D se plaignent de douleurs lombaires, ce qui peut \u00eatre li\u00e9 \u00e0 un affaiblissement des os. En cas de carence, l\u2019absorption du calcium et du phosphore risque d&#8217;\u00eatre inefficace, ce qui peut influer sur la masse osseuse.<\/p>\n<p>Les crampes musculaires, la douleur, la faiblesse, la fatigue et la perte de cheveux ont aussi \u00e9t\u00e9 attribu\u00e9s \u00e0 un faible taux de vitamine D. Si l&#8217;un ou l&#8217;autre de ces sympt\u00f4mes apparaissent, consultez un professionnel en soins de sant\u00e9 et demandez-lui de v\u00e9rifier votre taux de vitamine D.<\/p>\n<\/div><\/section><\/div>\n<section  class='av_textblock_section av-jmv8ih1f-0795f2185658ff48db238daae29bb331 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Voil\u00e0 pourquoi Vitamin D d\u2019USANA est con\u00e7u pour \u00eatre compl\u00e9mentaire \u00e0 d\u2019autres suppl\u00e9ments USANA, y compris les <a href=\"https:\/\/askthescientists.com\/fr\/qa\/cellsentials\/\">CellSentials<\/a>, <a href=\"https:\/\/askthescientists.com\/fr\/qa\/magnecal-d\/\">MagneCal D<\/a> et <a href=\"https:\/\/askthescientists.com\/fr\/qa\/usana-biomega\/\">BiOmega<\/a>. Vous avez ainsi un moyen simple d\u2019obtenir un apport quotidien de 50 mcg (2\u00a0000 UI) de vitamine D<sub>3<\/sub>. En prenant ces produits USANA ensemble, la plupart des adultes en sant\u00e9 peuvent ainsi obtenir un apport id\u00e9al et profiter du m\u00eame coup des bienfaits d\u2019un suppl\u00e9ment de vitamine D pour la sant\u00e9.<\/p>\n<p>Mieux encore, en prenant les CellSentials et le suppl\u00e9ment Vitamin D tous les jours, vous obtenez un apport de 570 mcg de vitamine K, dont 90 mcg de vitamine K<sub>2<\/sub>. (Vita Antioxidant renferme 480 mcg de vitamine K<sub>1<\/sub>, ce qui favorise la coagulation sanguine et la sant\u00e9 osseuse).*<\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jmv8ih1f-1-95aec1fc7161a00c2a2f9edcdbe685c4 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><a class=\"shop-link\" href=\"https:\/\/www.usana.com\/ux\/cart\/en-US\/so\/PHX-URL\/my_associates_id\/109.010101?utm_source=ATS&utm_medium=socialsharing\" target=\"blank\">Achetez Ici<\/a><\/p>\n<\/div><\/section>\n<div  class='flex_column av-5nhdq6e-08118fb8a01c6d72860b1b920d62e331 av_one_half  avia-builder-el-46  el_after_av_textblock  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-jmv8oo92-e68d9946fb4ae6c07aca613443441501 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h4><strong>Principaux ingr\u00e9dients<\/strong><\/h4>\n<ul>\n<li>Vitamine D<sub>3<\/sub><\/li>\n<li>Vitamine K<sub>2<\/sub><\/li>\n<\/ul>\n<p><a href=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/02\/vitamin-D-label-2024.png\">Voir la liste compl\u00e8te des ingr\u00e9dients<\/a><\/p>\n<\/div><\/section><\/div>\n<div  class='flex_column av-53sagp2-796cf7101ddd8178b92fd303cae87f42 av_one_half  avia-builder-el-48  el_after_av_one_half  el_before_av_hr  flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-jmv8psx5-e4cb8321cb0205972174387c0373fac8 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h4><strong>Mode d\u2019emploi<\/strong><\/h4>\n<p>Prendre un (1) comprim\u00e9 par jour, de pr\u00e9f\u00e9rence en mangeant.<\/p>\n<p>Garder hors de la port\u00e9e des enfants. Consultez un professionnel en soins de sant\u00e9 si vous \u00eates enceinte, allaitez, prenez un m\u00e9dicament d\u00e9livr\u00e9 sur ordonnance, ou souffrez d\u2019un probl\u00e8me de sant\u00e9.\u00a0 Si vous d\u00e9passez l\u2019apport maximal tol\u00e9rable (AMT) de 100\u00a0mcg (4 000 UI\/par jour) de vitamine D, il est recommand\u00e9 de passer des tests sanguins r\u00e9guli\u00e8rement pour v\u00e9rifier l\u2019\u00e9tat de la vitamine D et du calcium.<\/p>\n<h4><strong>Id\u00e9al pour<\/strong><\/h4>\n<ul>\n<li>Les adultes en sant\u00e9<\/li>\n<li>Les adultes avec un exc\u00e8s de poids ou ob\u00e8ses (carence probable)<\/li>\n<li>Les personnes qui utilisent r\u00e9guli\u00e8rement un \u00e9cran solaire ou qui restent le plus souvent \u00e0 l\u2019int\u00e9rieur<\/li>\n<li>R\u00e9gime kasher (Formule des \u00c9tats-Unis certifi\u00e9e kasher)<\/li>\n<\/ul>\n<\/div><\/section><\/div>\n<div  class='hr av-4q1tysm-5208a0facf9a50ece248ab8be1caf2ac hr-default  avia-builder-el-50  el_after_av_one_half  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jmv8q6bm-e1c58f8dbe43feb41c8c6c97701d9221 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h2 style=\"text-align: center;\"><strong>Vitamin D d\u2019USANA \u2013 Questions fr\u00e9quemment pos\u00e9es<\/strong><\/h2>\n<\/div><\/section>\n<div  class='togglecontainer av-jmv8s2av-adcc5fd46ade24b6958671dd0d268e86  avia-builder-el-52  el_after_av_textblock  el_before_av_hr  toggle_close_all' >\n<section class='av_toggle_section av-92e7d7-7786ccce27271d7c467c906b084e4d80'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-1' data-fake-id='#toggle-id-1' class='toggler  av-title-above '  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-1' data-slide-speed=\"200\" data-title=\"Puis-je prendre plus d\u2019un comprim\u00e9 de Vitamin D par jour?\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Puis-je prendre plus d\u2019un comprim\u00e9 de Vitamin D par jour?\" data-aria_expanded=\"Click to collapse: Puis-je prendre plus d\u2019un comprim\u00e9 de Vitamin D par jour?\">Puis-je prendre plus d\u2019un comprim\u00e9 de Vitamin D par jour?<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-1' aria-labelledby='toggle-toggle-id-1' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color '  itemprop=\"text\" ><p>USANA peut seulement vous recommander de suivre la posologie conseill\u00e9e et tout autre mode d\u2019emploi applicable, tels qu\u2019ils sont \u00e9nonc\u00e9s sur l\u2019\u00e9tiquette du produit. Si vous jugez avoir besoin d\u2019une dose plus \u00e9lev\u00e9e de vitamine D, veuillez consulter un professionnel en soins de sant\u00e9.<\/p>\n<\/div><\/div><\/div><\/section>\n<section class='av_toggle_section av-rv17v-59904e2e1e8dfdfa95328abdf0bf02aa'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-2' data-fake-id='#toggle-id-2' class='toggler  av-title-above '  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-2' data-slide-speed=\"200\" data-title=\"Vitamin D d\u2019USANA comporte une mise en garde relative aux tests sanguins. Pourquoi?\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Vitamin D d\u2019USANA comporte une mise en garde relative aux tests sanguins. Pourquoi?\" data-aria_expanded=\"Click to collapse: Vitamin D d\u2019USANA comporte une mise en garde relative aux tests sanguins. Pourquoi?\">Vitamin D d\u2019USANA comporte une mise en garde relative aux tests sanguins. Pourquoi?<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-2' aria-labelledby='toggle-toggle-id-2' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color '  itemprop=\"text\" ><p>L\u2019\u00e9tiquette sur le flacon de Vitamin D d\u2019USANA comporte la mise en garde suivante\u00a0:<br \/>\n\u00ab Garder hors de la port\u00e9e des enfants. Consultez votre m\u00e9decin si vous \u00eates enceinte, allaitez, prenez un m\u00e9dicament d\u00e9livr\u00e9 sur ordonnance, ou souffrez d\u2019un probl\u00e8me de sant\u00e9.\u00a0 Si vous d\u00e9passez l\u2019apport maximal tol\u00e9rable (AMT) de 100\u00a0\u00b5g (4 000 UI\/par jour) de vitamine D, il est recommand\u00e9 de passer des tests sanguins r\u00e9guli\u00e8rement pour v\u00e9rifier l\u2019\u00e9tat de la vitamine D et du \u00a0<a href=\"https:\/\/askthescientists.com\/qa\/calcium\/\">calcium<\/a>. \u00bb<\/p>\n<p>Outre la mise en garde normale sur les suppl\u00e9ments, celle d\u2019ordre g\u00e9n\u00e9ral portant sur les tests sanguins est donn\u00e9e \u00e0 titre de pr\u00e9caution. Il n\u2019y a aucun cas document\u00e9 de toxicit\u00e9 de la vitamine D \u00e0 une dose inf\u00e9rieure \u00e0\u00a0 30 000 UI. Par contre, l\u2019apport maximal tol\u00e9rable de vitamine D est actuellement fix\u00e9 \u00e0 100\u00a0\u00b5g (4 000 UI) par jour. Notre entreprise se fait un devoir de sensibiliser et d\u2019informer ses clients.<\/p>\n<p>Malheureusement, bon nombre d\u2019utilisateurs de suppl\u00e9ments alimentaires ne se m\u00e9fient pas d\u2019un exc\u00e8s possible ou ne veulent pas suivre les indications figurant sur l\u2019\u00e9tiquette.\u00a0Nous pr\u00e9sentons cette mise en garde suppl\u00e9mentaire, car m\u00eame si la carence en vitamine D est r\u00e9pandue, il ne faut pas prendre des produits contenant cette vitamine sans se soucier de la s\u00fbret\u00e9.<\/p>\n<p>\u00c0 ceux qui sont pr\u00e9occup\u00e9s par la s\u00e9curit\u00e9, qui sont soumis r\u00e9guli\u00e8rement \u00e0 une exposition solaire inhabituelle ou qui veulent conna\u00eetre avec certitude leur taux sanguin de vitamine D, nous conseillons de faire v\u00e9rifier ce taux avant de prendre des suppl\u00e9ments de vitamine D en forte quantit\u00e9.<\/p>\n<\/div><\/div><\/div><\/section>\n<section class='av_toggle_section av-54mgsr-a592d31743f6e00523fb5e2e92ad6824'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-3' data-fake-id='#toggle-id-3' class='toggler  av-title-above '  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-3' data-slide-speed=\"200\" data-title=\"Y a-t-il des contre-indications \u00e0 la prise de vitamine D?\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Y a-t-il des contre-indications \u00e0 la prise de vitamine D?\" data-aria_expanded=\"Click to collapse: Y a-t-il des contre-indications \u00e0 la prise de vitamine D?\">Y a-t-il des contre-indications \u00e0 la prise de vitamine D?<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-3' aria-labelledby='toggle-toggle-id-3' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color '  itemprop=\"text\" ><p>Il peut y avoir des contre-indications \u00e0 prendre des suppl\u00e9ments de vitamine D avec certains types de m\u00e9dicaments (y compris les st\u00e9ro\u00efdes et les hypocholest\u00e9rol\u00e9miants)\u00a0 Avant d\u2019utiliser des suppl\u00e9ments de vitamine D, les personnes qui prennent des m\u00e9dicaments doivent d\u2019abord consulter un professionnel en soins de sant\u00e9.<\/p>\n<\/div><\/div><\/div><\/section>\n<section class='av_toggle_section av-4ebr0b-d87ef5f9c52741dd79f80740b2227c7a'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-4' data-fake-id='#toggle-id-4' class='toggler  av-title-above '  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-4' data-slide-speed=\"200\" data-title=\"Comment convertir des microgrammes en UI?\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: Comment convertir des microgrammes en UI?\" data-aria_expanded=\"Click to collapse: Comment convertir des microgrammes en UI?\">Comment convertir des microgrammes en UI?<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-4' aria-labelledby='toggle-toggle-id-4' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color '  itemprop=\"text\" ><p>1 microgramme de vitamine D = 40 UI vitamine D<\/p>\n<p>Par ex.\u00a0:\u00a0 50 mcg de vitamine D = 2\u00a0000 UI de vitamine D<\/p>\n<\/div><\/div><\/div><\/section>\n<\/div>\n<div  class='hr av-2j2suw6-75d8a0424bb22ea5ffc393ba152519be hr-default  avia-builder-el-53  el_after_av_toggle_container  el_before_av_toggle_container '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<div  class='togglecontainer av-jmv8ux6s-9c37c52ebbbdc61ba8fd481c6b47d293  avia-builder-el-54  el_after_av_hr  el_before_av_hr  toggle_close_all' >\n<section class='av_toggle_section av-2ofqob-79a452ba6ab628bba0fde24629ffaf99'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-5' data-fake-id='#toggle-id-5' class='toggler  av-title-above '  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-5' data-slide-speed=\"200\" data-title=\"R\u00e9f\u00e9rences\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: R\u00e9f\u00e9rences\" data-aria_expanded=\"Click to collapse: R\u00e9f\u00e9rences\">R\u00e9f\u00e9rences<span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-5' aria-labelledby='toggle-toggle-id-5' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color '  itemprop=\"text\" ><p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/19307527\">Ginde A, Liu M, Camargo Jr. C. 2009. Demographic Differences and Trends of Vitamin D Insufficiency in the US Population, 1988-2004. Arch Intern Med. 169(6):626\u2013632.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/19064511\">Looker AC, et al. Serum 25-hydroxyvitamin D status of the US population: 1988- 1994 compared with 2000-2004. 2008. AJCN 88(6):1519-1527.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/17237325\">Bodnar LM, Simhan HN, Powers RW, Frank MP, Cooperstein E, Roberts JM. High Prevalence of Vitamin D Insufficiency in Black and White Pregnant Women Residing in the Northern United States and Their Neonates. 2007. J Nutr 137:447-452.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC3356951\/\">Nair R, Maseeh A. 2012. Vitamin D: The \u201csunshine\u201d vitamin. J Pharmacol Pharmacother 3(2): 118-126.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/29576359\">Sadat-Ali M, et al. 2018. Correlation of symptoms to serum vitamin D levels? Clin Nutr ESPEN 24: 31-34.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/23636546\">Ju SY, Lee YJ, Jeong SN. 2013. Serum 25-hydroxyvitamin D levels and the risk of depression: a systematic review and meta-analysis. J Nutr Health Aging 17(5): 447-55.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/16718398\">Erkal MZ, et al. 2006. High prevalence of vitamin D deficiency, secondary hyperparathyroidism and generalized bone pain in Turkish immigrants in Germany: identification of risk factors. Osteoporos Int 17(8): 1133-40.<\/a><\/p>\n<p>Vitamin D Council.\u00a0<a href=\"https:\/\/www.vitamindcouncil.org\/about-vitamin-d\/how-do-i-get-the-vitamin-d-my-body-needs\/\">https:\/\/www.vitamindcouncil.org\/about-vitamin-d\/how-do-i-get-the-vitamin-d-my-body-needs\/<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/25782422\">Oliveri B, et al. 2015. Vitamin D3 seems more appropriate than D2 to sustain adequate levels of 25OHD: a pharmacokinetic approach. Eur J Clin Nutr 69(6): 797-702.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC3349454\/\">Tripkovic L, et al. 2012. Comparison of vitamin D<sub>2<\/sub>\u00a0and vitamin D<sub>3<\/sub>\u00a0supplementation in raising serum 25-hydroxyvitamin D status: a systematic review and meta-analysis. Am J Clin Nutr 95(6): 1357-1364.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/18006902\">Shea MK, et al 2008. Vitamin K and Vitamin D Status: Associations with Inflammatory Markers in the Framingham Offspring Study. Am J Epidemiol 167(3): 313-20.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/17426097\">Binkley N, et al. 2007. Low Vitamin D Status despite Abundant Sun Exposure. J Clin Endroclinol Metab 92(6): 2130-5.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/18689389\">Norman A. 2008. From vitamin D to hormone D: fundamentals of the vitamin D endocrine system essential for good health. Am Jour Clin Nutr 88(2): 491S-499S.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/15585789\">DeLuca HF. Overview of general physiologic features and functions of vitamin D. 2004. Am J Clin Nutr 80(6 Suppl):1689S-1696S.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/21646368\">Holick MF, et al. 2011. Evaluation, Treatment, and Prevention of Vitamin D Deficiency: An Endocrine Society Clinical Practice Guideline. J Clin Endorcrinol 96(7): 1911-30.<\/a><\/p>\n<p>Vitamin D (Calcitriol). Vivo Pathophysiology [Internet] [accessed 25 July 2018] Available at <a href=\"http:\/\/www.vivo.colostate.edu\/hbooks\/pathphys\/endocrine\/otherendo\/vitamind.html\">http:\/\/www.vivo.colostate.edu\/hbooks\/pathphys\/endocrine\/otherendo\/vitamind.html<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/15886381\">Bischoff-Ferrari HA, Willett WC, Wong JB, Giovannucci E, Dietrich T, Dawson-Hughes B. Fracture prevention with vitamin D supplementation: a meta-analysis of randomized controlled trials. 2005. JAMA 293(18):2257-2264.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/12540414\">Feskanich D, Willett WC, Colditz GA. Calcium, vitamin D, milk consumption, and hip fractures: a prospective study among postmenopausal women. 2003. Am J Clin Nutr 77(2):504-511.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/14985208\">Holick MF. Vitamin D: importance in the prevention of cancers, type 1 diabetes, heart disease, and osteoporosis. 2004. Am J Clin Nutr 79(3):362-371.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/12202471\">Papadimitropoulos E, et al. Meta-analyses of therapies for postmenopausal osteoporosis. VIII: Meta-analysis of the efficacy of vitamin D treatment in preventing osteoporosis in postmenopausal women. 2002. Endocr Rev 23(4):560-9.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/23525894\">Knapen MH, et al. 2013. Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women. Osteoporos Int 24(9): 2499-507.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/17243866\">Bolton-Smith C, et al. 2007. Two-year randomized controlled trial of\u00a0vitamin\u00a0K1 (phylloquinone) and\u00a0vitamin\u00a0D3 plus calcium on the bone health of older women. J Bone Miner Res 22(4): 509-19.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/28403946\">Palermo A, et al. 2017. Vitamin K and osteoporosis: Myth or reality? Metabolism 70: 57-71.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/11916748\">Janssen HC, Samson MM, Verhaar HJ. 2002. Vitamin D deficiency, muscle function, and falls in elderly people. Am J Clin Nutr 75(4): 611-5.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/22249582\">Wimalawansa SJ. 2012. Vitamin D\u00a0in the new millennium. Curr Osteoporos Rep 10(1): 4-15.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/23083379\">Close GL, et al. 2013. Assessment of vitamin D concentration in non-supplemented professional athletes and healthy adults during the winter months in the UK: implications for skeletal muscle function. J Sports Sci 31(4): 344-53.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/28933742\">Manoy P, et al. 2017. Vitamin D Supplementation Improves Quality of Life and Physical Performance in Osteoarthritis Patients. Nutrients 9(8): pii: E799.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/30031389\">Apaydin M, et al. 2018. The effects of single high-dose or daily low-dosage oral colecalciferol [<em>sic<\/em>] treatment on vitamin D levels and muscle strength in postmenopausal women. BMC Endocr Disord 18(1): 48.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4230211\/\">Zhang FF, et al. 2014. Vitamin D Deficiency Is Associated with Progression of Knee Osteoarthritis. J Nutr 144(12): 2002-2008.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/28083666\">Jamil NA, et al. 2017. The relationship between vitamin D status and muscle strength in young healthy adults from sunny climate countries currently living in the northeast of Scotland. Osteoporos Int 28(4): 1433-1443.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/26770129\">Maresz K. 2015. Proper Calcium Use: Vitamin K2 as a Promoter of Bone and Cardiovascular Health. Integr Med (Encinitas). 14(1): 34-9.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/23595134\">Barker T, et al. 2013. Higher serum 25-hydroxyvitamin D concentrations associate with a faster recovery of skeletal muscle strength after muscular injury. Nutrition &amp; Metabolism 10: 1-10.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4580041\/\">Gr\u00f6ber U, Reichrath J, Holick MF, Kisters K. 2014. Vitamin K: an old vitamin in a new perspective. Dermatoendocrinol 6(1): e968490.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/21149724\">Edfeldt K, et al. 2010. T-cell cytokines differentially control human monocyte antimicrobial responses by regulating vitamin D metabolism. Proc Natl Acad Sci U S A 107(52): 22593-8.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/21527855\">Aranow C. 2011. Vitamin D and the immune system. J Investig Med 59(6): 881-6.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC3641753\/\">Misra D, et al. 2013. Vitamin K Deficiency Is Associated with Incident Knee Osteoarthritis. Am J Med 126(3): 243-248.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4339507\/\">Shea MK, et al. 2015. The association between vitamin K status and knee osteoarthritis features in older adults: The Health, Aging and Body Composition Study. Osteoarthritis Cartilage 23(3): 370-378.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4642156\/#b0525\">Mostafa W, Hegazy R. 2015. Vitamin D and the skin: focus on a complex relationship: a review. J Adv Res 6(6): 793-804.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/26431139\">Ghai B, et al. 2015. High prevalence of hypovitaminosis D in Indian chronic low back patients. Pain Physicial 18(5): E853-62.<\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/23758943\">e Silva AV, et al. 2103. Association of back pain with hypovitaminosis D in postmenopausal women with low bone mass. BMC Musculoskelet Disord 14: 184.<\/a><\/p>\n<\/div><\/div><\/div><\/section>\n<\/div>\n<div  class='hr av-1pygsx2-136db8bf0d8fc11da5c6fa986b1343eb hr-default  avia-builder-el-55  el_after_av_toggle_container  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jmv8zh90-569a18955c628607f7934c59aee172b9 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\">D&#8217;autres lectures int\u00e9ressantes<\/p>\n<\/div><\/section>\n<div class='flex_column_table av-jmv93ekd-738e8172da1f6465a97915aa122cfa78 sc-av_one_third av-equal-height-column-flextable'><div  class='flex_column av-jmv93ekd-738e8172da1f6465a97915aa122cfa78 av_one_third  avia-builder-el-57  el_after_av_textblock  el_before_av_one_third  first flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-jmv8yi4v-bf06176ac6335a929c904a7db3bbcb99 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><a href=\"https:\/\/askthescientists.com\/fr\/immune-system\/\"><img decoding=\"async\" class=\"aligncenter wp-image-12603 size-square\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/09\/immune-system-180x180.jpg\" alt=\"\" width=\"180\" height=\"180\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/09\/immune-system-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/09\/immune-system-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/09\/immune-system-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/09\/immune-system-120x120.jpg 120w\" sizes=\"(max-width: 180px) 100vw, 180px\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/askthescientists.com\/fr\/immune-system\/\"><strong>Le syst\u00e8me immunitaire : votre garde du corps<\/strong><\/a><\/p>\n<p>Un syst\u00e8me immunitaire fonctionnel et en sant\u00e9 est une machine multicouche complexe, compos\u00e9e de sous-syst\u00e8mes, tissus et organes, et r\u00e9gl\u00e9e par de nombreux processus.<\/p>\n<p style=\"text-align: center;\"><a class=\"btn btn-blue\" href=\" https:\/\/askthescientists.com\/fr\/immune-system\/\">Lire maintenant<\/a><\/p>\n<\/div><\/section><\/div>\n<div class='av-flex-placeholder'><\/div><div  class='flex_column av-11d337q-4739d85bd374bc2081ac71f2ba84e9be av_one_third  avia-builder-el-59  el_after_av_one_third  el_before_av_one_third  flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-jmv91hf0-ac101d5fa78c2466f324c13a336aa155 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><a href=\"https:\/\/askthescientists.com\/fr\/bone-health\/\"><img decoding=\"async\" class=\"aligncenter wp-image-20058 size-square\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/05\/Bone-anatomy-180x180.jpg\" alt=\"\" width=\"180\" height=\"180\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/05\/Bone-anatomy-180x180.jpg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/05\/Bone-anatomy-80x80.jpg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/05\/Bone-anatomy-400x400.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/05\/Bone-anatomy-36x36.jpg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/05\/Bone-anatomy-120x120.jpg 120w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/05\/Bone-anatomy-450x450.jpg 450w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/05\/Bone-anatomy.jpg 500w\" sizes=\"(max-width: 180px) 100vw, 180px\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/askthescientists.com\/fr\/bone-health\/\"><strong>Sant\u00e9 osseuse : bien comprendre l\u2019anatomie des os<\/strong><\/a><\/p>\n<p>Gr\u00e2ce \u00e0 l\u2019anatomie de vos os, votre squelette est beaucoup plus que la simple structure de votre corps. Apprenez \u00e0 mieux conna\u00eetre votre syst\u00e8me squelettique et d\u00e9couvrez les moyens de pr\u00e9server votre sant\u00e9 osseuse.<\/p>\n<p style=\"text-align: center;\"><a class=\"btn btn-blue\" href=\" https:\/\/askthescientists.com\/fr\/bone-health\/\">Lire maintenant<\/a><\/p>\n<\/div><\/section><\/div>\n<div class='av-flex-placeholder'><\/div><div  class='flex_column av-rb1e92-2c496405799a6b5fa63dc8740c2ebf34 av_one_third  avia-builder-el-61  el_after_av_one_third  el_before_av_textblock  flex_column_table_cell av-equal-height-column av-align-top av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-jmv933od-51c3cf0a28702e86f128e366048e6914 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><a href=\"https:\/\/askthescientists.com\/fr\/qa\/vitamins\/\"><img decoding=\"async\" class=\"aligncenter wp-image-19049 size-square\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/04\/vitamins-image-180x180.jpeg\" alt=\"\" width=\"180\" height=\"180\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/04\/vitamins-image-180x180.jpeg 180w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/04\/vitamins-image-80x80.jpeg 80w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/04\/vitamins-image-36x36.jpeg 36w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/04\/vitamins-image-120x120.jpeg 120w, https:\/\/askthescientists.com\/wp-content\/uploads\/2018\/04\/vitamins-image-450x450.jpeg 450w\" sizes=\"(max-width: 180px) 100vw, 180px\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/askthescientists.com\/fr\/qa\/vitamins\/\"><strong>De A \u00e0 K : votre guide complet des vitamines<\/strong><\/a><\/p>\n<p>Des notions de base sur les vitamines et leur utilit\u00e9 pour votre sant\u00e9. Apprenez-en davantage sur les vitamines n\u00e9cessaires \u00e0 votre organisme.<\/p>\n<p style=\"text-align: center;\"><a class=\"btn btn-blue\" href=\" https:\/\/askthescientists.com\/fr\/qa\/vitamins\/\">Lire maintenant<\/a><\/p>\n<\/div><\/section><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<section  class='av_textblock_section av-jmv93x9p-2767a24e77a94a00bc56e0c681d5d38d '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p class=\"fda\">*Ces d\u00e9clarations n\u2019ont pas \u00e9t\u00e9 \u00e9valu\u00e9es par la F\u00e9d\u00e9ration am\u00e9ricaine des aliments et drogues. Ce produit n&#8217;est destin\u00e9 ni \u00e0 diagnostiquer, ni \u00e0 traiter, gu\u00e9rir ni emp\u00eacher les maladies.<\/p>\n<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":10897,"featured_media":0,"menu_order":0,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"qa-category":[],"qa-tag":[20778],"class_list":["post-7547","qa","type-qa","status-publish","format-standard","hentry","qa-tag-vitamins-and-supplements"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Vitamin D d\u2019USANA - Ask The Scientists<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez comment Vitamin D d\u2019USANA peut se conjuguer aux bienfaits du soleil pour favoriser la sant\u00e9 cellulaire en aidant \u00e0 renforcer le corps, \u00e0 prot\u00e9ger la sant\u00e9 cardiaque et \u00e0 pr\u00e9server un syst\u00e8me immunitaire \u00e9quilibr\u00e9.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/askthescientists.com\/fr\/qa\/vitamind\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vitamin D d\u2019USANA - 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