{"id":11431,"date":"2017-08-14T13:23:46","date_gmt":"2017-08-14T19:23:46","guid":{"rendered":"https:\/\/askthescientists.com\/?p=11431\/"},"modified":"2019-12-30T10:45:22","modified_gmt":"2019-12-30T17:45:22","slug":"science-of-skincare","status":"publish","type":"post","link":"https:\/\/askthescientists.com\/fr\/science-of-skincare\/","title":{"rendered":"Le fondement scientifique des soins de la peau"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-11547\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/smiling-woman.jpg\" alt=\"skincare\" width=\"840\" height=\"413\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/smiling-woman.jpg 840w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/smiling-woman-300x148.jpg 300w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/smiling-woman-768x378.jpg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/smiling-woman-705x347.jpg 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/smiling-woman-450x221.jpg 450w\" sizes=\"(max-width: 840px) 100vw, 840px\" \/><\/p>\n<p>L\u2019aspect scientifique de la peau et des soins cutan\u00e9s appropri\u00e9s sera mieux compris avec un aper\u00e7u explicatif de l\u2019anatomie et de la physiologie de la peau. D\u00e9couvrez la structure et le mode de fonctionnement de la peau et de ses prot\u00e9ines importantes afin de prendre des d\u00e9cisions \u00e9clair\u00e9es en mati\u00e8re de soins cutan\u00e9s.<\/p>\n<h2><strong>Les couches de la peau<\/strong><\/h2>\n<p>La peau est un ensemble de trois couches de tissus conjonctifs. L\u2019\u00e9piderme, le derme et l\u2019hypoderme se rejoignent \u00e0 des jonctions cellulaires afin de former l\u2019organe le plus volumineux du corps humain.<\/p>\n<p>Chacune des couches cutan\u00e9es joue un r\u00f4le unique dans la pr\u00e9servation de l\u2019hom\u00e9ostasie \u2013 l\u2019\u00e9tat d\u2019\u00e9quilibre de l\u2019organisme. La peau r\u00e9gule la temp\u00e9rature corporelle interne, prot\u00e8ge les organes d\u00e9licats et assure une d\u00e9fense contre les pathog\u00e8nes et les microbes.<\/p>\n<p>Pour plus d\u2019information sur chacune des couches de la peau, leur structure et leur fonction, consultez <em><a href=\"https:\/\/askthescientists.com\/fr\/skin-layers\/\">Couche par couche\u00a0: comprendre la structure de la peau<\/a>.<\/em><\/p>\n<h2><strong>L\u2019hydratation<\/strong><\/h2>\n<p><img decoding=\"async\" class=\"aligncenter size-large wp-image-11476\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_101646-1030x773.jpeg\" alt=\"skincare\" width=\"1030\" height=\"773\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_101646-1030x773.jpeg 1030w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_101646-300x225.jpeg 300w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_101646-768x576.jpeg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_101646-1500x1125.jpeg 1500w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_101646-705x529.jpeg 705w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_101646-450x338.jpeg 450w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_101646.jpeg 1200w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/p>\n<p>Pour une peau saine et resplendissante, il est essentiel d\u2019y retenir l\u2019eau. La peau s\u00e8che peut para\u00eetre r\u00eache et in\u00e9gale et des l\u00e9sions peuvent se produire si elle gerce et se fissure.\u00a0 Une \u00e9tude r\u00e9cente publi\u00e9e dans le <em>International Wound Journal<\/em> insiste sur l\u2019importance de bien hydrater la peau au quotidien. On a montr\u00e9 que l\u2019hydratation de la peau deux fois par jour r\u00e9duit de pr\u00e8s de 50 % l\u2019incidence des d\u00e9chirures cutan\u00e9es chez les patients \u00e2g\u00e9s vivant en r\u00e9sidence avec services de soutien.<\/p>\n<p>L\u2019hydratant le plus efficace pour la peau s\u00e8che renferme des ingr\u00e9dients imitant les huiles naturelles produites par la peau. Cette similarit\u00e9 permet une int\u00e9gration en douceur de l\u2019hydratant \u00e0 la peau. Ce type d\u2019hydratant retient l\u2019eau dans la peau et favorise une bonne hydratation. Les huiles de source v\u00e9g\u00e9tale sont particuli\u00e8rement efficaces pour hydrater la peau s\u00e8che.<\/p>\n<h2><strong>Le collag\u00e8ne et l\u2019\u00e9lastine<\/strong><\/h2>\n<p>La peau est faite d\u2019un r\u00e9seau complexe de fibres et de prot\u00e9ines qui en affermit et en renforce la structure. Parmi ces prot\u00e9ines int\u00e9grales, signalons le collag\u00e8ne et l\u2019\u00e9lastine.<\/p>\n<p>Le collag\u00e8ne conf\u00e8re \u00e0 la peau une r\u00e9sistance remarquable.\u00a0 Avec l\u2019\u00e2ge, la production de collag\u00e8ne diminue et cette baisse peut causer des signes visibles de vieillissement\u00a0: peau flasque et terne, rides et ridules. La peau rec\u00e8le plusieurs types de prot\u00e9ines de collag\u00e8ne et chacune remplit une fonction unique.<\/p>\n<p>\u00c0 la jonction dermo-\u00e9pidermique (JDE), le collag\u00e8ne cr\u00e9e un cadre structurel pour d\u2019autres cellules cutan\u00e9es. De plus, il intervient dans le maintien de la stabilit\u00e9 structurelle de la JDE. La quantit\u00e9 de collag\u00e8ne beaucoup plus faible et le manque de stabilit\u00e9 \u00e0 la JDE dans une peau rid\u00e9e peuvent causer un accroissement des rides.<\/p>\n<p>L\u2019\u00e9lastine, une autre prot\u00e9ine importante de la matrice cutan\u00e9e, conf\u00e8re \u00e0 la peau \u00e9lasticit\u00e9 et r\u00e9silience. \u00a0Avec le temps, en raison d\u2019une baisse de la production d\u2019\u00e9lastine, la peau devient flasque.<\/p>\n<p>L\u2019\u00e9lastine d\u00e9cro\u00eet naturellement avec l\u2019\u00e2ge et les dommages par photo-induction subies par cette prot\u00e9ine constituent la cause la mieux comprise de la peau flasque. L\u2019exposition aux rayons UV entra\u00eene un raidissement et un repliement de la prot\u00e9ine d\u2019\u00e9lastine, inhibant sa capacit\u00e9 de reprendre sa forme. \u00a0Les dommages par photo-induction \u00e0 tr\u00e8s long terme entra\u00eene la perte d\u2019\u00e9lasticit\u00e9 de la prot\u00e9ine d\u2019\u00e9lastine, \u00a0ce qui l\u2019emp\u00eache alors d&#8217;assurer un soutien \u00e0 la structure de la peau.<\/p>\n<p>R\u00e8gle g\u00e9n\u00e9rale, les cr\u00e8mes et traitements pour la peau qui aident \u00e0 estomper les signes apparents du vieillissement renferment des ingr\u00e9dients \u00e9labor\u00e9s pour stimuler la synth\u00e8se du collag\u00e8ne ou de l\u2019\u00e9lastine. L\u2019action de ces produits att\u00e9nue les dommages li\u00e9s \u00e0 l\u2019\u00e2ge et au soleil et inverse ainsi les signes visibles du vieillissement comme les rides et ridules. \u00a0\u00a0Pour att\u00e9nuer efficacement l\u2019apparence des rides et ridules, il faut suivre un r\u00e9gime alliant un \u00e9cran solaire aux produits de soins de la peau.<\/p>\n<h2><strong>La peau et le vieillissement<\/strong><\/h2>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-11477\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_67714487-821x1030.jpeg\" alt=\"skincare\" width=\"500\" height=\"627\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_67714487-821x1030.jpeg 821w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_67714487-239x300.jpeg 239w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_67714487-768x963.jpeg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_67714487-1196x1500.jpeg 1196w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_67714487-562x705.jpeg 562w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_67714487-450x564.jpeg 450w, https:\/\/askthescientists.com\/wp-content\/uploads\/2017\/08\/AdobeStock_67714487.jpeg 957w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Fait in\u00e9vitable, la peau se transforme avec l\u2019\u00e2ge. Des soins de la peau appropri\u00e9s peuvent toutefois estomper les signes visibles du vieillissement. \u00a0L\u2019apparence vieillissante de la peau est attribuable \u00e0 deux formes reconnues du vieillissement \u2013 intrins\u00e8que et extrins\u00e8que. Un r\u00e9gime de soins de la peau efficace cible les signes de ces deux formes du vieillissement.<\/p>\n<p>Les facteurs du vieillissement cutan\u00e9 intrins\u00e8que englobent les variations dans les ant\u00e9c\u00e9dents g\u00e9n\u00e9tiques de chacun. Le vieillissement extrins\u00e8que est g\u00e9n\u00e9ralement li\u00e9 \u00e0 des facteurs ext\u00e9rieurs au corps humain. Parmi ces facteurs, citons le tabagisme, l\u2019exposition au soleil et une nutrition m\u00e9diocre.\u00a0 On attribue au coup de soleil pr\u00e8s de 80 % du vieillissement pr\u00e9matur\u00e9 du visage. Dans une large mesure, il est possible de pr\u00e9venir les facteurs ext\u00e9rieurs du vieillissement pr\u00e9matur\u00e9 de la peau.<\/p>\n<p>L\u2019ajout d\u2019antioxydants au r\u00e9gime alimentaire est assur\u00e9ment l\u2019un des moyens les plus efficaces d\u2019att\u00e9nuer l\u2019apparence du vieillissement cutan\u00e9. Les baies, l\u2019huile de th\u00e9ier, le th\u00e9 vert et l\u2019extrait de p\u00e9pins de raisin sont quelques-uns des antioxydants que l\u2019on peut trouver dans le r\u00e9gime alimentaire et les produits de soins de la peau. Les antioxydants emp\u00eachent les dommages caus\u00e9 par le soleil aux cellules cutan\u00e9es et favorisent un bon fonctionnement cellulaire. \u00a0Non seulement sont-ils importants pour la peau, mais ils aident aussi \u00e0 pr\u00e9server la sant\u00e9 du cerveau et de l\u2019organisme.<\/p>\n<h2><strong>En R\u00e9sum\u00e9<\/strong><\/h2>\n<p>Une bonne compr\u00e9hension des processus qui s&#8217;op\u00e8rent en coulisse peut aider \u00e0 prendre des d\u00e9cisions \u00e9clair\u00e9es en mati\u00e8re de soins de la peau. En choisissant un bon hydratant et en essayant de r\u00e9duire au minimum les dommages caus\u00e9s au collag\u00e8ne et \u00e0 l\u2019\u00e9lastine de la peau, il est possible d\u2019am\u00e9liorer la sant\u00e9 cutan\u00e9e et d\u2019att\u00e9nuer les signes du vieillissement. De plus, l\u2019\u00e9limination quotidienne des facteurs ext\u00e9rieurs du vieillissement peut donner \u00e0 la peau l&#8217;attention suppl\u00e9mentaire qu\u2019il lui faut pour lui conf\u00e9rer une apparence et une sensation de sant\u00e9 et de vitalit\u00e9.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/17200942\" target=\"_blank\" rel=\"noopener noreferrer\">Baumann, L. \u201cSkin ageing and its treatment.\u201d The Journal of Pathology 211.2 (2007): 241-51.<\/a><\/li>\n<li><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/25040325\" target=\"_blank\" rel=\"noopener noreferrer\">Carville, Kerlyn, Gavin Leslie, Rebecca Osseiran-Moisson, Nelly Newall, and Gill Lewin. \u201cThe effectiveness of a twice-daily skin-moisturizing regimen for reducing the incidence of skin tears.\u201d International Wound Journal 11.4 (2014): 446-53.<\/a><\/li>\n<li><a href=\"https:\/\/www.scientificamerican.com\/article\/why-does-skin-wrinkle-wit\/\" target=\"_blank\" rel=\"noopener noreferrer\">Obagi, Suzan. \u201cWhy does skin wrinkle with age? What is the best way to slow or prevent this process?\u201d Scientific American. N.p., n.d. Web. 28 July 2017.<\/a><\/li>\n<li><a href=\"https:\/\/www.aad.org\/public\/kids\/skin\/the-layers-of-your-skin\" target=\"_blank\" rel=\"noopener noreferrer\">\u201cThe layers of your skin.\u201d American Academy of Dermatology, n.d. Web 28 July 2017.<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019aspect scientifique de la peau et des soins cutan\u00e9s appropri\u00e9s sera mieux compris avec un aper\u00e7u explicatif de l\u2019anatomie et de la physiologie de la peau. D\u00e9couvrez la structure et le mode de fonctionnement de la peau et de ses prot\u00e9ines importantes afin de prendre des d\u00e9cisions \u00e9clair\u00e9es en mati\u00e8re de soins cutan\u00e9s. Les couches [&hellip;]<\/p>\n","protected":false},"author":5181,"featured_media":11547,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[284],"tags":[20775],"class_list":["post-11431","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition_spotlight-fr","tag-skin-care-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le fondement scientifique des soins de la peau - Ask The Scientists<\/title>\n<meta name=\"description\" content=\"The science of your skin and its proper care can be best understood through a comprehensive view of its anatomy and physiology.\" \/>\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\/science-of-skincare\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le fondement scientifique des soins de la peau - 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