{"id":5046,"date":"2015-12-11T20:26:47","date_gmt":"2015-12-11T20:26:47","guid":{"rendered":"https:\/\/askthescientists.com\/?post_type=qa&#038;p=5046\/"},"modified":"2025-08-06T18:39:28","modified_gmt":"2025-08-07T00:39:28","slug":"how-do-i-convert-iu-to-mg-or-mcg","status":"publish","type":"qa","link":"https:\/\/askthescientists.com\/fr\/qa\/how-do-i-convert-iu-to-mg-or-mcg\/","title":{"rendered":"Conversions des vitamines &#8211; Unit\u00e9s internationales (UI) en mg ou mcg"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-71628\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2015\/12\/AdobeStock_48997861.jpeg\" alt=\"\" width=\"835\" height=\"513\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2015\/12\/AdobeStock_48997861.jpeg 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2015\/12\/AdobeStock_48997861-400x246.jpeg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2015\/12\/AdobeStock_48997861-768x472.jpeg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2015\/12\/AdobeStock_48997861-705x433.jpeg 705w\" sizes=\"(max-width: 835px) 100vw, 835px\" \/><\/p>\n<p>Lorsque vous consultez l&#8217;\u00e9tiquette d&#8217;un produit alimentaire, la vari\u00e9t\u00e9 des mesures utilis\u00e9es pour indiquer la quantit\u00e9 de chaque vitamine pr\u00e9sente dans cet aliment peut \u00eatre d\u00e9concertante. Vous trouverez des termes tels que mg, mcg, UI, etc. Pourquoi ces diff\u00e9rents termes sont-ils utilis\u00e9s, et comment effectuer des conversions entre ces diff\u00e9rentes unit\u00e9s?<\/p>\n<p>Les unit\u00e9s internationales (UI) sont l&#8217;une des unit\u00e9s standardis\u00e9es utilis\u00e9es pour calculer ou \u00e9valuer la concentration et l&#8217;efficacit\u00e9 biologique des vitamines. Les UI sont pr\u00e9f\u00e9rables au poids pour de nombreuses vitamines, car les diff\u00e9rentes formes de vitamines peuvent pr\u00e9senter des concentrations diff\u00e9rentes. Les UI constituent un moyen normalis\u00e9 de calculer la concentration d&#8217;une vitamine sous diff\u00e9rentes formes.<\/p>\n<h2>UI, mcg et autres abr\u00e9viations d&#8217;unit\u00e9s figurant sur les \u00e9tiquettes<\/h2>\n<p>UI = unit\u00e9 internationale<\/p>\n<p>EAR = \u00e9quivalents d&#8217;activit\u00e9 du r\u00e9tinol<\/p>\n<p>EFA = \u00e9quivalent en folates alimentaires<\/p>\n<p>EN = \u00e9quivalent niacine<\/p>\n<p>mg = milligramme<\/p>\n<p>mcg = \u03bcg = microgramme<\/p>\n<h2>Conversions et calculs des unit\u00e9s de vitamines<\/h2>\n<p>Les informations ci-dessous fournissent une conversion approximative des unit\u00e9s standardis\u00e9es (UI, EAR, EFA, EN) de vitamines en milligrammes ou microgrammes.<\/p>\n<h3>Vitamine A<\/h3>\n<style>input[type=number]::-webkit-inner-spin-button,\ninput[type=number]::-webkit-outer-spin-button {\n-webkit-appearance: none;\nmargin: 0;\n}\ninput[type=number]{-moz-appearance: textfield;}<\/style><style>@media 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name=\"cp_calculatedfieldsf_pform_2\" id=\"cp_calculatedfieldsf_pform_2\" action=\"https:\/\/askthescientists.com\/fr\/qa\/how-do-i-convert-iu-to-mg-or-mcg\/\" method=\"post\" enctype=\"multipart\/form-data\" onsubmit=\"return fbuilderjQuery.fbuilder.doValidate(this);\" class=\"cff-form no-prefetch  cff-form-18 cp_cff_13\"  dir=\"ltr\" data-nonce=\"2dfdfc01d7\">\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_pform_psequence\" value=\"_2\" \/>\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_id\" value=\"18\" \/>\n<input type=\"hidden\" name=\"cp_ref_page\" value=\"https:\/\/askthescientists.com\/fr\" \/>\n<pre style=\"display:none !important;\"><script data-category=\"functional\" type=\"text\/javascript\">form_structure_2=[[{\"form_identifier\":\"\",\"name\":\"fieldname3\",\"fieldlayout\":\"default\",\"shortlabel\":\"\",\"index\":0,\"ftype\":\"fdiv\",\"userhelp\":\"\",\"audiotutorial\":\"\",\"userhelpTooltip\":false,\"tooltipIcon\":false,\"csslayout\":\"\",\"hidefield\":false,\"advanced\":{\"css\":{\"container\":{\"label\":\"Field container div tag\",\"rules\":{\"width\":\"100%\"}},\"label\":{\"label\":\"Field label\",\"rules\":{}},\"input\":{\"label\":\"Input tag\",\"rules\":{}},\"help\":{\"label\":\"Instructions for 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id=\"fieldlist_2\"><\/div>\n\t\t<div class=\"clearer\"><\/div>\n\t<\/div>\n<\/div>\n\t<div class=\"clearer\"><\/div>\n\t<input type=\"hidden\" id=\"_cpcff_public_nonce\" name=\"_cpcff_public_nonce\" value=\"67ee2099b5\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/fr\/wp-json\/wp\/v2\/qa\/5046\" \/><input type=\"hidden\" name=\"cff_form_start_time\" value=\"A0DEoFBqpGtHIzoyjhuQjg==\"><\/form>\n\t\n<h4>Niacine<\/h4>\n<style>input[type=number]::-webkit-inner-spin-button,\ninput[type=number]::-webkit-outer-spin-button {\n-webkit-appearance: none;\nmargin: 0;\n}\ninput[type=number]{-moz-appearance: textfield;}<\/style><style>@media (max-width:480px){#cp_calculatedfieldsf_pform_3{min-height:1375px;}}@media (max-width:768px){#cp_calculatedfieldsf_pform_3{min-height:909px;}}@media (max-width:1024px){#cp_calculatedfieldsf_pform_3{min-height:668px;}}@media (min-width:1024px){#cp_calculatedfieldsf_pform_3{min-height:660px;}}<\/style><form name=\"cp_calculatedfieldsf_pform_3\" 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id=\"fieldlist_3\"><\/div>\n\t\t<div class=\"clearer\"><\/div>\n\t<\/div>\n<\/div>\n\t<div class=\"clearer\"><\/div>\n\t<input type=\"hidden\" id=\"_cpcff_public_nonce\" name=\"_cpcff_public_nonce\" value=\"72429fd662\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/fr\/wp-json\/wp\/v2\/qa\/5046\" \/><input type=\"hidden\" name=\"cff_form_start_time\" value=\"A0DEoFBqpGtHIzoyjhuQjg==\"><\/form>\n\t\n<h3>Vitamine D<\/h3>\n<style>input[type=number]::-webkit-inner-spin-button,\ninput[type=number]::-webkit-outer-spin-button {\n-webkit-appearance: none;\nmargin: 0;\n}\ninput[type=number]{-moz-appearance: textfield;}<\/style><style>@media (max-width:480px){#cp_calculatedfieldsf_pform_4{min-height:768px;}}@media (max-width:768px){#cp_calculatedfieldsf_pform_4{min-height:454px;}}@media (max-width:1024px){#cp_calculatedfieldsf_pform_4{min-height:380px;}}@media (min-width:1024px){#cp_calculatedfieldsf_pform_4{min-height:320px;}}<\/style><form name=\"cp_calculatedfieldsf_pform_4\" id=\"cp_calculatedfieldsf_pform_4\" action=\"https:\/\/askthescientists.com\/fr\/qa\/how-do-i-convert-iu-to-mg-or-mcg\/\" method=\"post\" enctype=\"multipart\/form-data\" onsubmit=\"return fbuilderjQuery.fbuilder.doValidate(this);\" class=\"cff-form no-prefetch  cff-form-20 cp_cff_13\"  dir=\"ltr\" data-nonce=\"2dfdfc01d7\">\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_pform_psequence\" value=\"_4\" \/>\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_id\" value=\"20\" \/>\n<input type=\"hidden\" name=\"cp_ref_page\" value=\"https:\/\/askthescientists.com\/fr\" \/>\n<pre style=\"display:none !important;\"><script data-category=\"functional\" type=\"text\/javascript\">form_structure_4=[[{\"form_identifier\":\"\",\"name\":\"fieldname3\",\"fieldlayout\":\"default\",\"shortlabel\":\"\",\"index\":0,\"ftype\":\"fdiv\",\"userhelp\":\"\",\"audiotutorial\":\"\",\"userhelpTooltip\":false,\"tooltipIcon\":false,\"csslayout\":\"\",\"hidefield\":false,\"advanced\":{\"css\":{\"container\":{\"label\":\"Field container div tag\",\"rules\":{\"width\":\"100%\"}},\"label\":{\"label\":\"Field label\",\"rules\":{}},\"input\":{\"label\":\"Input tag\",\"rules\":{}},\"help\":{\"label\":\"Instructions for 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id=\"fieldlist_4\"><\/div>\n\t\t<div class=\"clearer\"><\/div>\n\t<\/div>\n<\/div>\n\t<div class=\"clearer\"><\/div>\n\t<input type=\"hidden\" id=\"_cpcff_public_nonce\" name=\"_cpcff_public_nonce\" value=\"bfee98e328\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/fr\/wp-json\/wp\/v2\/qa\/5046\" \/><input type=\"hidden\" name=\"cff_form_start_time\" value=\"A0DEoFBqpGtHIzoyjhuQjg==\"><\/form>\n\t\n<h3>Vitamine E<\/h3>\n<style>input[type=number]::-webkit-inner-spin-button,\ninput[type=number]::-webkit-outer-spin-button {\n-webkit-appearance: none;\nmargin: 0;\n}\ninput[type=number]{-moz-appearance: textfield;}<\/style><style>@media (max-width:480px){#cp_calculatedfieldsf_pform_5{min-height:768px;}}@media (max-width:768px){#cp_calculatedfieldsf_pform_5{min-height:489px;}}@media (max-width:1024px){#cp_calculatedfieldsf_pform_5{min-height:380px;}}@media (min-width:1024px){#cp_calculatedfieldsf_pform_5{min-height:320px;}}<\/style><form name=\"cp_calculatedfieldsf_pform_5\" id=\"cp_calculatedfieldsf_pform_5\" action=\"https:\/\/askthescientists.com\/fr\/qa\/how-do-i-convert-iu-to-mg-or-mcg\/\" method=\"post\" enctype=\"multipart\/form-data\" onsubmit=\"return fbuilderjQuery.fbuilder.doValidate(this);\" class=\"cff-form no-prefetch  cff-form-21 cp_cff_13\"  dir=\"ltr\" data-nonce=\"2dfdfc01d7\">\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_pform_psequence\" value=\"_5\" \/>\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_id\" value=\"21\" \/>\n<input type=\"hidden\" name=\"cp_ref_page\" value=\"https:\/\/askthescientists.com\/fr\" \/>\n<pre style=\"display:none !important;\"><script data-category=\"functional\" 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(synth\\u00e9tique)\",\"_developerNotes\":\"\",\"predefined\":\"\",\"required\":false,\"exclude\":false,\"accept_html\":false,\"size\":\"large\",\"eq\":\"fieldname5*0.45\",\"min\":\"\",\"max\":\"\",\"suffix\":\"\",\"prefix\":\"\",\"decimalsymbol\":\".\",\"groupingsymbol\":\"\",\"readonly\":true,\"currency\":false,\"noEvalIfManual\":true,\"formatDynamically\":false,\"dynamicEval\":true,\"validate\":true,\"fBuild\":{},\"parent\":\"fieldname4\"}],{\"0\":{\"title\":\"\",\"titletag\":\"H2\",\"textalign\":\"default\",\"headertextcolor\":\"\",\"description\":\"\",\"formlayout\":\"top_aligned\",\"formtemplate\":\"cp_cff_13\",\"evalequations\":1,\"evalequations_delay\":0,\"evalequationsevent\":2,\"direction\":\"ltr\",\"loading_animation\":0,\"autocomplete\":1,\"persistence\":0,\"animate_form\":0,\"animation_effect\":\"fade\",\"customstyles\":\"input[type=number]::-webkit-inner-spin-button,\\ninput[type=number]::-webkit-outer-spin-button {\\n-webkit-appearance: none;\\nmargin: 0;\\n}\\ninput[type=number]{-moz-appearance: textfield;}\",\"advanced\":{\"css\":{\"header\":{\"label\":\"Form header\",\"rules\":{}},\"title\":{\"label\":\"Form title\",\"rules\":{}},\"description\":{\"label\":\"Form description\",\"rules\":{}},\"form\":{\"label\":\"Form area\",\"rules\":{}},\"buttons\":{\"label\":\"Form context buttons (Next page, Previous page, Submit)\",\"rules\":{}},\"buttons_hover\":{\"label\":\"Form context buttons hover\",\"rules\":{}},\"tooltips\":{\"label\":\"Instructions for users tooltips\",\"rules\":{}},\"error_bubble\":{\"label\":\"Error bubbles\",\"rules\":{}},\"error_bubble_arrow\":{\"label\":\"Error bubble arrow\",\"rules\":{\"border-bottom-color\":\"\"},\"restrict\":true},\"required_field_asterisk\":{\"label\":\"Asterisk for required fields\",\"rules\":{}}}}},\"formid\":\"cp_calculatedfieldsf_pform_5\"}];<\/script><\/pre>\n<div id=\"fbuilder\">\n\t\t<div id=\"fbuilder_5\">\n\t\t<div id=\"formheader_5\"><\/div>\n\t\t<div id=\"fieldlist_5\"><\/div>\n\t\t<div class=\"clearer\"><\/div>\n\t<\/div>\n<\/div>\n\t<div class=\"clearer\"><\/div>\n\t<input type=\"hidden\" id=\"_cpcff_public_nonce\" name=\"_cpcff_public_nonce\" value=\"cf931f192a\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/fr\/wp-json\/wp\/v2\/qa\/5046\" \/><input type=\"hidden\" name=\"cff_form_start_time\" value=\"der5LQH+XU7B6y07J6jJCQ==\"><\/form>\n\t\n<div  class='togglecontainer av-d97g4-f6d9b087218c8d820c668dd39adea670  avia-builder-el-0  avia-builder-el-no-sibling  toggle_close_all' >\n<section class='av_toggle_section av-bbuj8-91ce38e025dac6fa61813325ae256f84'  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=\"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-1' aria-labelledby='toggle-toggle-id-1' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color '  itemprop=\"text\" ><p><a href=\"https:\/\/www.fda.gov\/media\/129863\/download\">https:\/\/www.fda.gov\/media\/129863\/download<\/a><\/p>\n<\/div><\/div><\/div><\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Lorsque vous consultez l&#8217;\u00e9tiquette d&#8217;un produit alimentaire, la vari\u00e9t\u00e9 des mesures utilis\u00e9es pour indiquer la quantit\u00e9 de chaque vitamine pr\u00e9sente dans cet aliment peut \u00eatre d\u00e9concertante. Vous trouverez des termes tels que mg, mcg, UI, etc. Pourquoi ces diff\u00e9rents termes sont-ils utilis\u00e9s, et comment effectuer des conversions entre ces diff\u00e9rentes unit\u00e9s? Les unit\u00e9s internationales (UI) [&hellip;]<\/p>\n","protected":false},"author":10897,"featured_media":71631,"menu_order":0,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"qa-category":[],"qa-tag":[20782],"class_list":["post-5046","qa","type-qa","status-publish","format-standard","has-post-thumbnail","hentry","qa-tag-essential-nutrients"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Conversions des vitamines - Unit\u00e9s internationales (UI) en mg ou mcg - Ask The Scientists<\/title>\n<meta name=\"description\" content=\"Les unit\u00e9s internationales (UI) servent \u00e0 mesurer la concentration des vitamines. La formule de conversion des UI des vitamines en mg ou en mcg d\u00e9pend de la forme de la vitamine \u00e0 \u00e9valuer. Vous trouverez ici les calculs courants pour les vitamines.\" \/>\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\/how-do-i-convert-iu-to-mg-or-mcg\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Conversions des vitamines - Unit\u00e9s internationales (UI) en mg ou mcg - Ask The Scientists\" \/>\n<meta property=\"og:description\" content=\"Les unit\u00e9s internationales (UI) servent \u00e0 mesurer la concentration des vitamines. La formule de conversion des UI des vitamines en mg ou en mcg d\u00e9pend de la forme de la vitamine \u00e0 \u00e9valuer. Vous trouverez ici les calculs courants pour les vitamines.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/askthescientists.com\/fr\/qa\/how-do-i-convert-iu-to-mg-or-mcg\/\" \/>\n<meta property=\"og:site_name\" content=\"Ask The Scientists\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/AskTheScientists\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-07T00:39:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2015\/12\/AdobeStock_48997861.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"835\" \/>\n\t<meta property=\"og:image:height\" content=\"513\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@Ask_Scientists\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/askthescientists.com\\\/fr\\\/qa\\\/how-do-i-convert-iu-to-mg-or-mcg\\\/\",\"url\":\"https:\\\/\\\/askthescientists.com\\\/fr\\\/qa\\\/how-do-i-convert-iu-to-mg-or-mcg\\\/\",\"name\":\"Conversions des vitamines - Unit\u00e9s internationales (UI) en mg ou mcg - Ask The Scientists\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/askthescientists.com\\\/fr\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/askthescientists.com\\\/fr\\\/qa\\\/how-do-i-convert-iu-to-mg-or-mcg\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/askthescientists.com\\\/fr\\\/qa\\\/how-do-i-convert-iu-to-mg-or-mcg\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/askthescientists.com\\\/wp-content\\\/uploads\\\/2015\\\/12\\\/AdobeStock_48997861.jpeg\",\"datePublished\":\"2015-12-11T20:26:47+00:00\",\"dateModified\":\"2025-08-07T00:39:28+00:00\",\"description\":\"Les unit\u00e9s internationales (UI) servent \u00e0 mesurer la concentration des vitamines. 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