{"id":36577,"date":"2026-11-01T11:18:41","date_gmt":"2026-11-01T10:18:41","guid":{"rendered":"https:\/\/www.certifiedcosmetics.com\/blog\/non-classifiee\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\/"},"modified":"2026-11-01T11:18:41","modified_gmt":"2026-11-01T10:18:41","slug":"cest-quoi-la-marge-de-securite-dans-les-cosmetiques","status":"publish","type":"post","link":"https:\/\/www.certifiedcosmetics.com\/fr\/blog\/securite-des-cosmetiques\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\/","title":{"rendered":"C&#8217;est quoi, la \u00ab marge de s\u00e9curit\u00e9 \u00bb dans les cosm\u00e9tiques ?"},"content":{"rendered":"<div class=\"qMYqUG_convSearchResultHighlightRoot\">\n<div class=\"relative w-full overflow-visible\">\n<section class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a01e90e-6514-83eb-a5dc-a56fa3d838a2-0\" data-turn-id-container=\"request-6a01e90e-6514-83eb-a5dc-a56fa3d838a2-0\" data-testid=\"conversation-turn-20\" data-scroll-anchor=\"false\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\">\n<div class=\"flex max-w-full flex-col gap-4 grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&amp;]:mt-1\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden\">\n<div class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\">\n<p data-start=\"93\" data-end=\"430\"><img decoding=\"async\" class=\" wp-image-17817 alignright\" src=\"https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-640x640.jpg\" alt=\"\" width=\"299\" height=\"299\" srcset=\"https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-640x640.jpg 640w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-160x160.jpg 160w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-768x768.jpg 768w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-320x320.jpg 320w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-400x400.jpg 400w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-300x300.jpg 300w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-600x600.jpg 600w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-100x100.jpg 100w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-60x60.jpg 60w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS-110x110.jpg 110w, https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS.jpg 800w\" sizes=\"(max-width: 299px) 100vw, 299px\" \/>En vertu du <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">le r\u00e8glement (CE) n\u00b0 1223\/2009<\/span><\/span>, tout produit cosm\u00e9tique mis sur le march\u00e9 de l&#8217;UE doit faire l&#8217;objet d&#8217;une <a href=\"https:\/\/www.certifiedcosmetics.com\/fr\/product\/evaluation-de-la-securite-des-produits-cosmetiques\/offre-groupee-devaluation-de-la-securite-des-produits-de-parfumerie-et-de-cosmetique\/\">\u00e9valuation formelle de la s\u00e9curit\u00e9<\/a> d\u00e9montrant qu&#8217;il <strong>ne<\/strong> pr\u00e9sente <strong>aucun risque pour la sant\u00e9 humaine dans des conditions d&#8217;utilisation normales et raisonnablement pr\u00e9visibles.<\/strong><\/p>\n<p data-start=\"432\" data-end=\"524\">L&#8217;un des concepts les plus importants de cette \u00e9valuation, c&#8217;est la <strong data-start=\"497\" data-end=\"523\">marge de s\u00e9curit\u00e9 (MoS)<\/strong>.<\/p>\n<p data-start=\"526\" data-end=\"760\">M\u00eame si ce terme peut para\u00eetre tr\u00e8s technique, le principe qui se cache derri\u00e8re est assez simple : le MoS permet de d\u00e9terminer si l&#8217;exposition des consommateurs \u00e0 un ingr\u00e9dient reste suffisamment en dessous des niveaux associ\u00e9s \u00e0 des effets nocifs.<\/p>\n<p data-start=\"762\" data-end=\"914\">C&#8217;est l&#8217;un des outils utilis\u00e9s par les experts en s\u00e9curit\u00e9 pour d\u00e9terminer si un ingr\u00e9dient cosm\u00e9tique peut \u00eatre consid\u00e9r\u00e9 comme s\u00fbr \u00e0 la concentration utilis\u00e9e dans une formulation.<\/p>\n<h2 data-section-id=\"1relhqx\" data-start=\"921\" data-end=\"956\">Pourquoi la marge de s\u00e9curit\u00e9 est importante<\/h2>\n<p data-start=\"958\" data-end=\"1067\">Les donn\u00e9es toxicologiques \u00e0 elles seules ne permettent pas de d\u00e9terminer automatiquement si un ingr\u00e9dient est sans danger dans un produit cosm\u00e9tique.<\/p>\n<p data-start=\"1069\" data-end=\"1247\">Un ingr\u00e9dient peut pr\u00e9senter des effets ind\u00e9sirables \u00e0 fortes doses lors d&#8217;\u00e9tudes en laboratoire, tout en restant parfaitement s\u00fbr dans les conditions r\u00e9elles d&#8217;utilisation des cosm\u00e9tiques, car l&#8217;exposition des consommateurs est bien moindre.<\/p>\n<p data-start=\"1249\" data-end=\"1313\">La marge de s\u00e9curit\u00e9 sert justement \u00e0 quantifier cette diff\u00e9rence entre :<\/p>\n<ul data-start=\"1315\" data-end=\"1471\">\n<li data-section-id=\"1hb59ia\" data-start=\"1315\" data-end=\"1391\">la dose \u00e0 laquelle des effets ind\u00e9sirables ont \u00e9t\u00e9 observ\u00e9s lors d\u2019\u00e9tudes toxicologiques<\/li>\n<li data-section-id=\"1g189ed\" data-start=\"1392\" data-end=\"1471\">La quantit\u00e9 estim\u00e9e \u00e0 laquelle les consommateurs sont r\u00e9ellement expos\u00e9s lors de l&#8217;utilisation des produits cosm\u00e9tiques<\/li>\n<\/ul>\n<p data-start=\"1473\" data-end=\"1593\">En pratique, plus le MoS est \u00e9lev\u00e9, plus la marge de s\u00e9curit\u00e9 entre l&#8217;exposition r\u00e9elle et les niveaux potentiellement nocifs est grande.<\/p>\n<h2 data-section-id=\"12gygnx\" data-start=\"1600\" data-end=\"1641\">Comment on calcule la marge de s\u00e9curit\u00e9<\/h2>\n<p data-start=\"1643\" data-end=\"1699\">Le MoS est g\u00e9n\u00e9ralement calcul\u00e9 en comparant deux valeurs :<\/p>\n<ul data-start=\"1701\" data-end=\"1917\">\n<li data-section-id=\"kb4aal\" data-start=\"1701\" data-end=\"1790\">Le <strong data-start=\"1707\" data-end=\"1716\">NOAEL<\/strong> (niveau sans effet nocif observ\u00e9), issu d&#8217;\u00e9tudes toxicologiques<\/li>\n<li data-section-id=\"1jlyy6l\" data-start=\"1791\" data-end=\"1917\"><strong data-start=\"1797\" data-end=\"1829\">La dose d&#8217;exposition syst\u00e9mique (SED)<\/strong>, qui estime la quantit\u00e9 de substance \u00e0 laquelle les consommateurs sont expos\u00e9s lors d&#8217;une utilisation normale<\/li>\n<\/ul>\n<p data-start=\"1919\" data-end=\"1946\">L&#8217;\u00e9quation simplifi\u00e9e est la suivante :<\/p>\n<h4 data-start=\"1950\" data-end=\"1999\">Marge de s\u00e9curit\u00e9 = NOAEL \u00f7 dose d&#8217;exposition syst\u00e9mique<\/h4>\n<p data-start=\"2001\" data-end=\"2135\">Ce calcul aide les \u00e9valuateurs de s\u00e9curit\u00e9 \u00e0 d\u00e9terminer si le niveau d&#8217;utilisation pr\u00e9vu d&#8217;un ingr\u00e9dient offre une marge de s\u00e9curit\u00e9 acceptable.<\/p>\n<p data-start=\"2184\" data-end=\"2298\">Selon les recommandations europ\u00e9ennes, une marge de s\u00e9curit\u00e9 sup\u00e9rieure \u00e0 100 est g\u00e9n\u00e9ralement consid\u00e9r\u00e9e comme acceptable pour les ingr\u00e9dients cosm\u00e9tiques.<\/p>\n<p data-start=\"2300\" data-end=\"2490\">Ce seuil est con\u00e7u pour int\u00e9grer des facteurs de s\u00e9curit\u00e9 tenant compte des diff\u00e9rences entre les conditions d&#8217;essai en laboratoire et l&#8217;exposition r\u00e9elle chez l&#8217;homme, ainsi que de la variabilit\u00e9 d&#8217;un individu \u00e0 l&#8217;autre.<\/p>\n<p data-start=\"2492\" data-end=\"2653\">Si la marge de s\u00e9curit\u00e9 calcul\u00e9e est trop faible, il faudra peut-\u00eatre r\u00e9duire la concentration de l\u2019ingr\u00e9dient, m\u00eame si celui-ci est l\u00e9galement autoris\u00e9 par la r\u00e9glementation.<\/p>\n<p data-start=\"2655\" data-end=\"2824\">\n<h2 data-section-id=\"14boyf\" data-start=\"2831\" data-end=\"2863\">L\u2019exposition joue un r\u00f4le central<\/h2>\n<p data-start=\"2865\" data-end=\"2923\">La marge de s\u00e9curit\u00e9 d\u00e9pend fortement de l&#8217;exposition des consommateurs.<\/p>\n<p data-start=\"2925\" data-end=\"2984\">Plusieurs facteurs influencent le calcul de l&#8217;exposition, notamment :<\/p>\n<ul data-start=\"2986\" data-end=\"3136\">\n<li data-section-id=\"jag1wa\" data-start=\"2986\" data-end=\"3034\">si le produit se rince ou s&#8217;il reste sur la peau<\/li>\n<li data-section-id=\"1jlezdr\" data-start=\"3035\" data-end=\"3063\">La fr\u00e9quence d&#8217;application<\/li>\n<li data-section-id=\"1qr8aba\" data-start=\"3064\" data-end=\"3084\">La quantit\u00e9 appliqu\u00e9e<\/li>\n<li data-section-id=\"ya8pzt\" data-start=\"3085\" data-end=\"3109\">La surface de peau expos\u00e9e<\/li>\n<li data-section-id=\"icnnso\" data-start=\"3110\" data-end=\"3136\">Le taux d&#8217;absorption cutan\u00e9e<\/li>\n<\/ul>\n<p data-start=\"3138\" data-end=\"3288\">Par exemple, un m\u00eame ingr\u00e9dient peut donner des valeurs MoS tr\u00e8s diff\u00e9rentes selon qu&#8217;il est utilis\u00e9 dans un shampoing, une lotion pour le corps ou un s\u00e9rum pour le visage.<\/p>\n<p data-start=\"3290\" data-end=\"3450\">C&#8217;est pour \u00e7a que <strong>l&#8217;\u00e9valuation de la s\u00e9curit\u00e9<\/strong> des produits cosm\u00e9tiques <strong>prend toujours en compte le produit fini et les conditions d&#8217;utilisation pr\u00e9vues, plut\u00f4t que d&#8217;\u00e9valuer les ingr\u00e9dients pris isol\u00e9ment.<\/strong><\/p>\n<p data-start=\"3967\" data-end=\"4074\">\n<h2 data-section-id=\"1s89szw\" data-start=\"4081\" data-end=\"4139\">La marge de s\u00e9curit\u00e9 s&#8217;inscrit dans le cadre d&#8217;une \u00e9valuation plus large de la s\u00e9curit\u00e9<\/h2>\n<p data-start=\"4141\" data-end=\"4278\">M\u00eame si le MoS est un \u00e9l\u00e9ment central de l&#8217;\u00e9valuation de la s\u00e9curit\u00e9 des produits cosm\u00e9tiques, ce n&#8217;est pas le seul facteur pris en compte lors de l&#8217;\u00e9valuation de la conformit\u00e9.<\/p>\n<p data-start=\"4280\" data-end=\"4442\">D&#8217;autres aspects, comme la qualit\u00e9 microbiologique, les impuret\u00e9s, la stabilit\u00e9, la compatibilit\u00e9 des emballages et les obligations en mati\u00e8re d&#8217;\u00e9tiquetage, contribuent aussi \u00e0 la s\u00e9curit\u00e9 globale du produit.<\/p>\n<p data-start=\"4444\" data-end=\"4600\">La marge de s\u00e9curit\u00e9 doit donc \u00eatre consid\u00e9r\u00e9e comme<strong> un \u00e9l\u00e9ment s&#8217;inscrivant dans un cadre scientifique et r\u00e9glementaire plus large<\/strong>, destin\u00e9 \u00e0 prot\u00e9ger la sant\u00e9 des consommateurs.<\/p>\n<p data-start=\"4602\" data-end=\"4783\" data-is-last-node=\"\" data-is-only-node=\"\">Dans le cadre de la r\u00e9glementation europ\u00e9enne sur les cosm\u00e9tiques, la s\u00e9curit\u00e9 est garantie par des donn\u00e9es document\u00e9es, une \u00e9valuation de l&#8217;exposition et une \u00e9valuation toxicologique \u2014 et pas seulement par le choix des ingr\u00e9dients.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>En vertu du le r\u00e8glement (CE) n\u00b0 1223\/2009, tout produit cosm\u00e9tique mis sur le march\u00e9 de l&#8217;UE doit faire l&#8217;objet d&#8217;une \u00e9valuation formelle de la s\u00e9curit\u00e9 d\u00e9montrant qu&#8217;il ne pr\u00e9sente aucun risque pour la sant\u00e9 humaine dans des conditions d&#8217;utilisation normales et raisonnablement pr\u00e9visibles. L&#8217;un des concepts les plus importants de cette \u00e9valuation, c&#8217;est la&#8230;<\/p>\n","protected":false},"author":294,"featured_media":17820,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[301],"tags":[],"class_list":["post-36577","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-securite-des-cosmetiques"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.4 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>C&#039;est quoi, la \u00ab marge de s\u00e9curit\u00e9 \u00bb dans les cosm\u00e9tiques ? - Certified Cosmetics<\/title>\n<meta name=\"description\" content=\"D\u00e9couvre ce que signifie la \u00ab marge de s\u00e9curit\u00e9 \u00bb (MoS) dans le domaine des cosm\u00e9tiques, comment elle est calcul\u00e9e et pourquoi elle est essentielle pour l&#039;\u00e9valuation de la s\u00e9curit\u00e9 des produits cosm\u00e9tiques et leur conformit\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:\/\/www.certifiedcosmetics.com\/fr\/blog\/securite-des-cosmetiques\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C&#039;est quoi, la \u00ab marge de s\u00e9curit\u00e9 \u00bb dans les cosm\u00e9tiques ?\" \/>\n<meta property=\"og:description\" content=\"D\u00e9couvre ce que signifie la \u00ab marge de s\u00e9curit\u00e9 \u00bb (MoS) dans le domaine des cosm\u00e9tiques, comment elle est calcul\u00e9e et pourquoi elle est essentielle pour l&#039;\u00e9valuation de la s\u00e9curit\u00e9 des produits cosm\u00e9tiques et leur conformit\u00e9.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.certifiedcosmetics.com\/fr\/blog\/securite-des-cosmetiques\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\/\" \/>\n<meta property=\"og:site_name\" content=\"Certified Cosmetics\" \/>\n<meta property=\"article:published_time\" content=\"2026-11-01T10:18:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/05\/MoS.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Angela\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Angela\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/fr\\\/blog\\\/securite-des-cosmetiques\\\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/fr\\\/blog\\\/securite-des-cosmetiques\\\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\\\/\"},\"author\":{\"name\":\"Angela\",\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/fr\\\/#\\\/schema\\\/person\\\/2620f9d56cb0c867784edb68de06746c\"},\"headline\":\"C&#8217;est quoi, la \u00ab marge de s\u00e9curit\u00e9 \u00bb dans les cosm\u00e9tiques ?\",\"datePublished\":\"2026-11-01T10:18:41+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/fr\\\/blog\\\/securite-des-cosmetiques\\\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\\\/\"},\"wordCount\":819,\"publisher\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/fr\\\/blog\\\/securite-des-cosmetiques\\\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/MoS.jpg\",\"articleSection\":[\"S\u00e9curit\u00e9 des cosm\u00e9tiques\"],\"inLanguage\":\"fr-FR\",\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/fr\\\/blog\\\/securite-des-cosmetiques\\\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\\\/\",\"url\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/fr\\\/blog\\\/securite-des-cosmetiques\\\/cest-quoi-la-marge-de-securite-dans-les-cosmetiques\\\/\",\"name\":\"C'est quoi, la \u00ab marge de s\u00e9curit\u00e9 \u00bb dans les cosm\u00e9tiques ? 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