{"id":16611,"date":"2022-04-28T16:36:35","date_gmt":"2022-04-28T13:36:35","guid":{"rendered":"https:\/\/medimall.gr\/?p=16611"},"modified":"2022-04-28T16:42:24","modified_gmt":"2022-04-28T13:42:24","slug":"quel-est-le-role-la-vitamine-b12","status":"publish","type":"post","link":"https:\/\/medimall.gr\/fr\/quel-est-le-role-la-vitamine-b12\/","title":{"rendered":"Quel est le r\u00f4le de la vitamine B12 ?"},"content":{"rendered":"<p>[vc_row][vc_column][vc_column_text]Qu&#8217;avez-vous entendu sur la vitamine B12 ? En r\u00e9alit\u00e9, il s\u2019agit d\u2019un simple chiffre puisqu\u2019on compte seulement huit vitamines B (B1, B2, B3, B5, B6, B8, B9 et B12). Mais que savons-nous de ce dernier ?<\/p>\n<h3><span style=\"font-size: 24px;\">Histoire du nutriment<\/span><\/h3>\n<p>C&#8217;est dans les ann\u00e9es 1800 que la recherche scientifique s&#8217;int\u00e9resse \u00e0 la vitamine B12. En effet, l&#8217;an\u00e9mie pernicieuse mortelle pousse la communaut\u00e9 scientifique \u00e0 s&#8217;int\u00e9resser \u00e0 cette vitamine. Le r\u00f4le de la vitamine B12 dans l&#8217;an\u00e9mie et dans la synth\u00e8se des globules rouges est d\u00e9couvert peu de temps apr\u00e8s. En 1948, Dorothy Hodgkin identifie la configuration tridimensionnelle de la vitamine B12. Ce n&#8217;est qu&#8217;en 2007 que f\u00fbt achev\u00e9e l&#8217;\u00e9tude de la synth\u00e8se de vitamine B12 par les micro-organismes.<\/p>\n<h3><span style=\"font-size: 24px;\">Qu&#8217;est-ce que la vitamine B12 ?<\/span><\/h3>\n<p>Cette vitamine rouge vif se distingue par sa teneur en cobalt : elle est la seule vitamine \u00e0 en contenir, d\u2019o\u00f9 son nom, &#8220;cobalamine&#8221;. Elle a pour particularit\u00e9 de n\u2019\u00eatre pr\u00e9sente sous une forme assimilable par l\u2019homme que dans les produits animaux. En effet, synth\u00e9tis\u00e9e uniquement par des bact\u00e9ries, levures et microalgues, elle doit, d\u2019abord, se retrouver dans le syst\u00e8me digestif des animaux qui la consomme. L\u00e0, elle y fermente, se multiplie et se transforme pour arriver \u00e0 la forme que nous pouvons assimiler. Une fois consomm\u00e9e, l\u2019organisme la stocke facilement, notamment dans le foie.<\/p>\n<h3><span style=\"font-size: 24px;\">\u00c0 quoi sert la vitamine B12 (cobalamine) ?<\/span><\/h3>\n<p>Fatigue, <a href=\"https:\/\/medimall.gr\/fr\/l-acupuncture-une-methode-de-traitement-ancestrale\/\">stress<\/a>, troubles intestinaux\u2026 Vous manquez peut-\u00eatre de vitamine B12. Comment y rem\u00e9dier ? En faisant une cure de compl\u00e9ments alimentaires. La dur\u00e9e peut varier selon l\u2019importance de votre carence mais g\u00e9n\u00e9ralement 30 jours sont recommand\u00e9s pour que la cure soit pleinement efficace. La vitamine B12 a de nombreuses fonctions dans l&#8217;organisme. Elle est essentielle :<\/p>\n<ul>\n<li>\u00e0 la multiplication cellulaire,<\/li>\n<li>\u00e0 la synth\u00e8se de l\u2019ADN,<\/li>\n<li>\u00e0 la synth\u00e8se des acides gras,<\/li>\n<li>\u00e0 la synth\u00e8se de neurom\u00e9diateurs,<\/li>\n<li>au fonctionnement du syst\u00e8me nerveux.<\/li>\n<\/ul>\n<h3><span style=\"font-size: 24px;\">O\u00f9 trouver de la vitamine B12 ?<\/span><\/h3>\n<p>Ce sont les produits et sous-produits animaux qui contiennent de la vitamine B12. Les aliments les plus riches en vitamine B12 sont ainsi :<\/p>\n<ul>\n<li>les abats : foie (18,7 \u00b5g pour 100g), rognons (37 \u00b5g \u00e0 77 \u00b5g pour 100g de rognons d\u2019agneau, de dinde et de veau)<\/li>\n<li>les poissons : maquereaux (19 \u00b5g), sardines (8,94 \u00b5g), saumon (3,05 \u00b5g)<\/li>\n<li>les produits de la mer : hu\u00eetres (15,6 \u00b5g), crevettes (1,49 \u00b5g), crabe ( 6,79 \u00b5g), palourdes (jusqu\u2019\u00e0 99 \u00b5g pour 100g), poulpe (15 \u00b5g)<\/li>\n<li>les \u0153ufs (1,1 \u00b5g),<\/li>\n<li>les viandes (0,6 \u00b5g),<\/li>\n<li>le lait (0,5 \u00b5g),<\/li>\n<li>les fromages (0,8 \u00b5g).<\/li>\n<\/ul>\n<h3><span style=\"font-size: 24px;\">Comment \u039212 est mieux absorb\u00e9e ?<\/span><\/h3>\n<p>Lorsque l&#8217;on consomme cette vitamine B12 sous forme de <a href=\"https:\/\/medimall.gr\/fr\/les-aliments-qui-mettent-de-bonne-humeur\/\">compl\u00e9ment alimentaire<\/a>, le dosage peut aller jusqu&#8217;\u00e0 5000 \u03bcg, ce qui est bien \u00e9loign\u00e9 de la dose recommand\u00e9e de 2,4\u03bcg journali\u00e8re. On peut l&#8217;expliquer par le stockage de la vitamine B12 dans l&#8217;organisme permettant de prendre certains compl\u00e9ments alimentaires mensuellement et non quotidiennement. En parall\u00e8le, la vitamine B12 contenue dans un comprim\u00e9 n&#8217;est pas totalement absorb\u00e9e par l&#8217;organisme, il faudra donc prendre un compl\u00e9ment tr\u00e8s dos\u00e9 pour couvrir ses besoins. Pour savoir quelle vitamine B12 choisir selon votre cas, veuillez demander l&#8217;avis de votre m\u00e9decin.<\/p>\n<p>Dans certains cas particuliers, la vitamine B12 peut \u00eatre administr\u00e9e sous forme d&#8217;injection. Par exemple, en cas de malabsorption s\u00e9v\u00e8re ou \u00e0 la suite d&#8217;une chirurgie digestive. La vitamine B12 en injection peut cependant entra\u00eener quelques effets secondaires ind\u00e9sirables : prurit, urticaire, ecz\u00e9ma, etc.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text]Qu&#8217;avez-vous entendu sur la vitamine B12 ? En r\u00e9alit\u00e9, il s\u2019agit d\u2019un simple chiffre puisqu\u2019on compte seulement huit vitamines B (B1, B2, B3, B5, B6, B8, B9 et B12). Mais que savons-nous de ce dernier ? Histoire du nutriment C&#8217;est dans les ann\u00e9es 1800 que la recherche scientifique s&#8217;int\u00e9resse \u00e0 la vitamine B12. En effet, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":16594,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[22],"tags":[],"featured_image_src":{"landsacpe":["https:\/\/medimall.gr\/wp-content\/uploads\/2022\/04\/therapies-1-800x445.jpg",800,445,true],"list":["https:\/\/medimall.gr\/wp-content\/uploads\/2022\/04\/therapies-1-463x348.jpg",463,348,true],"medium":["https:\/\/medimall.gr\/wp-content\/uploads\/2022\/04\/therapies-1-300x300.jpg",300,300,true],"full":["https:\/\/medimall.gr\/wp-content\/uploads\/2022\/04\/therapies-1.jpg",800,800,false]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Quel est le r\u00f4le de la vitamine B12 ? - Medimall IVF Clinic<\/title>\n<meta name=\"description\" content=\"Quel est le r\u00f4le de la vitamine B12 ? - Medimall IVF Clinic\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/medimall.gr\/fr\/quel-est-le-role-la-vitamine-b12\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quel est le r\u00f4le de la vitamine B12 ? 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