{"id":1246,"date":"2026-09-03T15:04:15","date_gmt":"2026-09-03T14:04:15","guid":{"rendered":"https:\/\/www.nutrixeal.fr\/expertise\/?p=1246"},"modified":"2026-09-24T13:32:51","modified_gmt":"2026-09-24T12:32:51","slug":"vitamine-d3-k2","status":"publish","type":"post","link":"https:\/\/www.nutrixeal.fr\/expertise\/vitamine-d3-k2\/","title":{"rendered":"Synergie Vitamine D3 et K2&nbsp;: pourquoi associer ces deux vitamines&nbsp;?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">La vitamine D3 est bien connue, la vitamine K2 beaucoup moins. Pourtant, les deux se retrouvent de plus en plus souvent dans le m\u00eame compl\u00e9ment alimentaire. Ce duo n&rsquo;est pas un argument marketing&nbsp;: il repose sur la fa\u00e7on dont ces vitamines interviennent, chacune \u00e0 son niveau, sur le trajet du calcium dans l&rsquo;organisme.<\/p>\n\n\n\r\n<section class=\"article-callout article-callout--summary panel summary-box\">\r\n\r\n    <div class=\"article-callout__header\">\r\n      <span class=\"article-callout__icon\" aria-hidden=\"true\">\r\n                  <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\">\r\n            <path d=\"M3.5 10C3.5 6.22876 3.5 4.34315 4.7448 3.17157C5.98959 2 7.99306 2 12 2H12.7727C16.0339 2 17.6645 2 18.7969 2.79784C19.1214 3.02643 19.4094 3.29752 19.6523 3.60289C20.5 4.66867 20.5 6.20336 20.5 9.27273V11.8182C20.5 14.7814 20.5 16.2629 20.0311 17.4462C19.2772 19.3486 17.6829 20.8491 15.6616 21.5586C14.4044 22 12.8302 22 9.68182 22C7.88275 22 6.98322 22 6.26478 21.7478C5.10979 21.3424 4.19875 20.4849 3.76796 19.3979C3.5 18.7217 3.5 17.8751 3.5 16.1818V10Z\" stroke=\"#4FA729\" stroke-width=\"1.5\" stroke-linejoin=\"round\"\/>\r\n            <path d=\"M20.5 12C20.5 13.8409 19.0076 15.3333 17.1667 15.3333C16.5009 15.3333 15.716 15.2167 15.0686 15.3901C14.4935 15.5442 14.0442 15.9935 13.8901 16.5686C13.7167 17.216 13.8333 18.0009 13.8333 18.6667C13.8333 20.5076 12.3409 22 10.5 22\" stroke=\"#4FA729\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n            <path d=\"M8 7H15\" stroke=\"#4FA729\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n            <path d=\"M8 11H11\" stroke=\"#4FA729\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n          <\/svg>\r\n                <\/span>\r\n\r\n      <p class=\"article-callout__title\">\r\n        En r\u00e9sum\u00e9      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"article-callout__content\">\r\n      \n<ul class=\"wp-block-list\">\n<li><strong>Duo compl\u00e9mentaire<\/strong>&nbsp;: La vitamine D3 favorise l\u2019absorption du calcium, tandis que la K2 aide \u00e0 orienter son utilisation par les tissus.<\/li>\n\n\n\n<li><strong>Soutien osseux<\/strong>&nbsp;: Les deux vitamines contribuent au maintien d\u2019une ossature normale, avec des r\u00f4les diff\u00e9rents dans le parcours du calcium.<\/li>\n\n\n\n<li><strong>K2 et fixation du calcium<\/strong>&nbsp;: La vitamine K2 active l\u2019ost\u00e9ocalcine, une prot\u00e9ine impliqu\u00e9e dans la fixation du calcium dans la matrice osseuse.<\/li>\n\n\n\n<li><strong>Suppl\u00e9mentation utile<\/strong>&nbsp;: L\u2019association D3-K2 est surtout pertinente en cas d\u2019apports insuffisants et \/ ou de faible exposition solaire.<\/li>\n\n\n\n<li><strong>Qualit\u00e9 et pr\u00e9cautions<\/strong>&nbsp;: Privil\u00e9gier D3, K2 MK-7 trans et prise avec un repas gras&nbsp;; \u00e9viter sans avis m\u00e9dical sous anticoagulants antivitamine K.<\/li>\n<\/ul>\n    <\/div>\r\n\r\n<\/section>\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-b5fa8d8a\"><h2 class=\"uagb-heading-text\">Pourquoi associer les vitamines D3 et K2&nbsp;?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Le raisonnement tient en une phrase&nbsp;: la vitamine D3 aide le corps \u00e0 assimiler le calcium, la vitamine K2 intervient sur son utilisation par les tissus. L&rsquo;une ouvre la porte, l&rsquo;autre oriente le trafic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamine D contribue \u00e0 l&rsquo;absorption et \u00e0 l&rsquo;utilisation normales du calcium et du phosphore.&nbsp;C&rsquo;est son action la mieux \u00e9tablie, et elle explique pourquoi une carence en vitamine D se r\u00e9percute directement sur le squelette.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De son c\u00f4t\u00e9, la vitamine K2 active des prot\u00e9ines qui fixent le calcium dans la matrice osseuse, l&rsquo;ost\u00e9ocalcine en particulier. Ces prot\u00e9ines existent dans l&rsquo;organisme sous forme inactive, et cette vitamine sert de cofacteur \u00e0 leur activation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Associer les&nbsp;<a href=\"https:\/\/www.nutrixeal.fr\/219-physiok2-vitamines-k2-d3.html\">vitamine D3 et K2<\/a>&nbsp;revient donc \u00e0 couvrir les deux \u00e9tapes d&rsquo;une m\u00eame cha\u00eene. C&rsquo;est la logique qui pr\u00e9side \u00e0 leur pr\u00e9sence conjointe dans une m\u00eame formule, et elle repose sur une base solide.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette compl\u00e9mentarit\u00e9 explique aussi pourquoi les deux vitamines se retrouvent souvent dans les m\u00eames produits. Un apport isol\u00e9 reste utile, mais les deux r\u00e9unies couvrent l&rsquo;ensemble du parcours, de l&rsquo;assiette jusqu&rsquo;\u00e0 l&rsquo;os.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-19422e0c\"><h2 class=\"uagb-heading-text\">Quels sont les bienfaits de la vitamine D3&nbsp;?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamine D3, ou chol\u00e9calcif\u00e9rol, est la forme que la peau fabrique sous l&rsquo;effet du soleil et celle que l&rsquo;on retrouve dans les poissons gras. C&rsquo;est aussi la forme la plus utilis\u00e9e en suppl\u00e9mentation. Les vitamines D3 du march\u00e9 existent d\u00e9sormais en version d&rsquo;origine v\u00e9g\u00e9tale, issue du lichen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Son r\u00f4le sur le squelette est central&nbsp;: la vitamine D joue un r\u00f4le de chef d&rsquo;orchestre dans la gestion du calcium.&nbsp;La vitamine D contribue au maintien d&rsquo;une ossature normale, une propri\u00e9t\u00e9 qui d\u00e9coule directement de son action sur l&rsquo;assimilation de ce min\u00e9ral.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Elle agit aussi ailleurs.&nbsp;La vitamine D contribue au maintien d&rsquo;une fonction musculaire normale, un point qui int\u00e9resse particuli\u00e8rement les seniors, chez qui la masse musculaire se r\u00e9duit naturellement au-del\u00e0 de 65 ans.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamine D contribue par ailleurs au fonctionnement normal du syst\u00e8me immunitaire.&nbsp;Cette propri\u00e9t\u00e9, moins connue que la pr\u00e9c\u00e9dente, explique une partie de l&rsquo;int\u00e9r\u00eat port\u00e9 \u00e0 cette vitamine pendant les mois d&rsquo;hiver.<\/p>\n\n\n\r\n<section class=\"article-callout article-callout--takeaway panel summary-box\">\r\n\r\n    <div class=\"article-callout__header\">\r\n      <span class=\"article-callout__icon\" aria-hidden=\"true\">\r\n                  <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n            <path d=\"M5.14286 14C4.41735 12.8082 4 11.4118 4 9.91886C4 5.54539 7.58172 2 12 2C16.4183 2 20 5.54539 20 9.91886C20 11.4118 19.5827 12.8082 18.8571 14\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\"\/>\r\n            <path d=\"M7.38287 17.0982C7.291 16.8216 7.24507 16.6833 7.25042 16.5713C7.26174 16.3343 7.41114 16.1262 7.63157 16.0405C7.73579 16 7.88105 16 8.17157 16H15.8284C16.119 16 16.2642 16 16.3684 16.0405C16.5889 16.1262 16.7383 16.3343 16.7496 16.5713C16.7549 16.6833 16.709 16.8216 16.6171 17.0982C16.4473 17.6094 16.3624 17.8651 16.2315 18.072C15.9572 18.5056 15.5272 18.8167 15.0306 18.9408C14.7935 19 14.525 19 13.9881 19H10.0119C9.47495 19 9.2065 19 8.96944 18.9408C8.47283 18.8167 8.04281 18.5056 7.7685 18.072C7.63755 17.8651 7.55266 17.6094 7.38287 17.0982Z\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M15 19L14.8707 19.6466C14.7293 20.3537 14.6586 20.7072 14.5001 20.9866C14.2552 21.4185 13.8582 21.7439 13.3866 21.8994C13.0816 22 12.7211 22 12 22C11.2789 22 10.9184 22 10.6134 21.8994C10.1418 21.7439 9.74484 21.4185 9.49987 20.9866C9.34144 20.7072 9.27073 20.3537 9.12932 19.6466L9 19\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M12 16V11\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n          <\/svg>\r\n                <\/span>\r\n\r\n      <p class=\"article-callout__title\">\r\n        Bon \u00e0 savoir      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"article-callout__content\">\r\n      \n<p class=\"wp-block-paragraph\">La vitamine D est n\u00e9cessaire \u00e0 une croissance et \u00e0 un d\u00e9veloppement osseux normaux des enfants, ce qui justifie l&rsquo;attention port\u00e9e \u00e0 leurs apports d\u00e8s le plus jeune \u00e2ge.<\/p>\n    <\/div>\r\n\r\n<\/section>\n\n\n<p class=\"wp-block-paragraph\">En France, la r\u00e9f\u00e9rence nutritionnelle pour l&rsquo;adulte s&rsquo;\u00e9tablit \u00e0 15 \u00b5g par jour.<sup>[1]<\/sup>&nbsp;L&rsquo;alimentation seule couvre rarement ce niveau, et l&rsquo;ensoleillement hivernal ne suffit pas sous nos latitudes.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-493fc15b\"><h2 class=\"uagb-heading-text\">Quels sont les bienfaits de la vitamine K2&nbsp;?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamine K se d\u00e9cline en deux familles. La K1, ou phylloquinone, vient des l\u00e9gumes verts. La vitamine K2, ou m\u00e9naquinone, est produite par des bact\u00e9ries et se retrouve dans les produits ferment\u00e9s, le natto japonais en t\u00eate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamine K2 contribue \u00e0 une coagulation sanguine normale.&nbsp;C&rsquo;est la propri\u00e9t\u00e9 historique de cette vitamine, celle qui lui a donn\u00e9 son nom, et elle vaut aussi bien pour la K1 que pour la m\u00e9naquinone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sa seconde propri\u00e9t\u00e9 int\u00e9resse davantage ce sujet.&nbsp;La vitamine K2 contribue au maintien d&rsquo;une ossature normale, par l&rsquo;interm\u00e9diaire des prot\u00e9ines qu&rsquo;elle active dans le tissu osseux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette vitamine se d\u00e9cline elle-m\u00eame en plusieurs formes, dont les plus courantes sont la MK-4 et la MK-7. Cette derni\u00e8re, la m\u00e9naquinone-7, reste plus longtemps pr\u00e9sente dans le sang apr\u00e8s absorption, ce qui explique qu&rsquo;elle soit privil\u00e9gi\u00e9e dans les compl\u00e9ments alimentaires.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les apports quotidiens en vitamine K2 restent modestes dans l&rsquo;alimentation occidentale, o\u00f9 les aliments ferment\u00e9s occupent peu de place. C&rsquo;est l&rsquo;une des raisons pour lesquelles cette vitamine s&rsquo;invite aujourd&rsquo;hui dans les formules destin\u00e9es au capital osseux.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-c8fea5a2\"><h2 class=\"uagb-heading-text\">Comment la synergie D3-K2 optimise la sant\u00e9 osseuse&nbsp;?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est sur l&rsquo;os que la synergie prend tout son sens, parce que les deux vitamines y interviennent \u00e0 des \u00e9tapes diff\u00e9rentes du m\u00eame processus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La premi\u00e8re \u00e9tape est l&rsquo;absorption intestinale du calcium, \u00e0 laquelle la vitamine D contribue directement. Sans elle, une part importante du calcium alimentaire n&rsquo;est tout simplement pas assimil\u00e9e, quelle que soit la qualit\u00e9 de l&rsquo;alimentation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La seconde \u00e9tape est la fixation de ce calcium dans la matrice osseuse. C&rsquo;est l\u00e0 qu&rsquo;intervient la vitamine K2&nbsp;: elle active l&rsquo;ost\u00e9ocalcine, une prot\u00e9ine qui lie le calcium au tissu osseux. Une ost\u00e9ocalcine non activ\u00e9e ne remplit pas ce r\u00f4le.<\/p>\n\n\n\r\n<section class=\"article-callout article-callout--takeaway panel summary-box\">\r\n\r\n    <div class=\"article-callout__header\">\r\n      <span class=\"article-callout__icon\" aria-hidden=\"true\">\r\n                  <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n            <path d=\"M5.14286 14C4.41735 12.8082 4 11.4118 4 9.91886C4 5.54539 7.58172 2 12 2C16.4183 2 20 5.54539 20 9.91886C20 11.4118 19.5827 12.8082 18.8571 14\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\"\/>\r\n            <path d=\"M7.38287 17.0982C7.291 16.8216 7.24507 16.6833 7.25042 16.5713C7.26174 16.3343 7.41114 16.1262 7.63157 16.0405C7.73579 16 7.88105 16 8.17157 16H15.8284C16.119 16 16.2642 16 16.3684 16.0405C16.5889 16.1262 16.7383 16.3343 16.7496 16.5713C16.7549 16.6833 16.709 16.8216 16.6171 17.0982C16.4473 17.6094 16.3624 17.8651 16.2315 18.072C15.9572 18.5056 15.5272 18.8167 15.0306 18.9408C14.7935 19 14.525 19 13.9881 19H10.0119C9.47495 19 9.2065 19 8.96944 18.9408C8.47283 18.8167 8.04281 18.5056 7.7685 18.072C7.63755 17.8651 7.55266 17.6094 7.38287 17.0982Z\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M15 19L14.8707 19.6466C14.7293 20.3537 14.6586 20.7072 14.5001 20.9866C14.2552 21.4185 13.8582 21.7439 13.3866 21.8994C13.0816 22 12.7211 22 12 22C11.2789 22 10.9184 22 10.6134 21.8994C10.1418 21.7439 9.74484 21.4185 9.49987 20.9866C9.34144 20.7072 9.27073 20.3537 9.12932 19.6466L9 19\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M12 16V11\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n          <\/svg>\r\n                <\/span>\r\n\r\n      <p class=\"article-callout__title\">\r\n        Bon \u00e0 savoir      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"article-callout__content\">\r\n      \n<p class=\"wp-block-paragraph\">Les deux vitamines partagent la m\u00eame reconnaissance sur ce terrain. La vitamine D et la vitamine K2 contribuent l&rsquo;une comme l&rsquo;autre au maintien d&rsquo;une ossature normale, ce qui fait de leur synergie une base coh\u00e9rente pour la sant\u00e9 du squelette.<\/p>\n    <\/div>\r\n\r\n<\/section>\n\n\n<p class=\"wp-block-paragraph\">Pour une utilisation optimale du calcium alimentaire, les deux maillons comptent donc autant l&rsquo;un que l&rsquo;autre. C&rsquo;est tout le principe de cette compl\u00e9mentarit\u00e9&nbsp;: l&rsquo;apport de calcium, aussi bon soit-il, ne suffit pas \u00e0 lui seul.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette compl\u00e9mentarit\u00e9 n&rsquo;a pas fait l&rsquo;objet d&rsquo;une reconnaissance en tant que telle. Ce sont les deux vitamines prises s\u00e9par\u00e9ment dont les propri\u00e9t\u00e9s sont \u00e9tablies, et c&rsquo;est d\u00e9j\u00e0 beaucoup.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-d92a58f4\"><h2 class=\"uagb-heading-text\">La vitamine D3 et K2 pour la sant\u00e9 cardiovasculaire<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est le terrain sur lequel la prudence s&rsquo;impose, et il faut le dire clairement&nbsp;: aucune propri\u00e9t\u00e9 cardiovasculaire n&rsquo;est reconnue \u00e0 ce jour pour ces deux vitamines.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La vitamine K intervient dans l&rsquo;activation de prot\u00e9ines d\u00e9pendantes de cette vitamine, notamment la MGP (<em>Matrix Gla Protein<\/em>), pr\u00e9sente dans les tissus vasculaires et impliqu\u00e9e dans la r\u00e9gulation de la calcification. Cette prot\u00e9ine constitue l&rsquo;un des m\u00e9canismes naturels qui s&rsquo;opposent au d\u00e9p\u00f4t de calcium dans les tissus mous.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette voie biologique est aujourd&rsquo;hui bien document\u00e9e, et plusieurs essais montrent que la suppl\u00e9mentation en vitamine K2, notamment sous forme de MK-7, am\u00e9liore les marqueurs d&rsquo;activation de la MGP. Les r\u00e9sultats concernant la calcification art\u00e9rielle elle-m\u00eame sont en revanche plus h\u00e9t\u00e9rog\u00e8nes. Des travaux r\u00e9cents, dont un essai randomis\u00e9 publi\u00e9 en 2026, sugg\u00e8rent qu&rsquo;une suppl\u00e9mentation en MK-7 pourrait ralentir la progression de la calcification coronaire dans certaines populations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ces donn\u00e9es restent toutefois insuffisantes pour conclure \u00e0 une protection cardiovasculaire&nbsp;: il n&rsquo;est pas \u00e9tabli \u00e0 ce jour que la suppl\u00e9mentation en vitamine K2, seule ou associ\u00e9e \u00e0 la vitamine D3, r\u00e9duise le risque d&rsquo;infarctus, d&rsquo;AVC ou de d\u00e9c\u00e8s cardiovasculaire. Aucune all\u00e9gation de sant\u00e9 cardiovasculaire n&rsquo;est d&rsquo;ailleurs autoris\u00e9e dans l&rsquo;Union europ\u00e9enne pour ces vitamines.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En revanche, la vitamine D comme la vitamine K disposent d&rsquo;all\u00e9gations reconnues concernant le maintien d&rsquo;une ossature normale. Leur association peut donc \u00eatre pr\u00e9sent\u00e9e de fa\u00e7on beaucoup plus \u00e9tay\u00e9e dans le contexte de la sant\u00e9 osseuse.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-8ba587dc\"><h2 class=\"uagb-heading-text\">Quand et pourquoi envisager une suppl\u00e9mentation&nbsp;?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La question se pose surtout pour la vitamine D, dont les apports sont insuffisants chez une grande partie de la population.<sup>[2]<\/sup>&nbsp;L&rsquo;exposition solaire d&rsquo;octobre \u00e0 avril ne permet pas une production naturelle suffisante sous nos latitudes&nbsp;: six mois par an, la peau ne prend plus le relais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Plusieurs profils sont concern\u00e9s en priorit\u00e9&nbsp;: les personnes \u00e2g\u00e9es, dont la peau synth\u00e9tise moins bien cette vitamine apr\u00e8s 75 ans, les personnes peu expos\u00e9es au soleil, celles \u00e0 peau fonc\u00e9e, et les femmes m\u00e9nopaus\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une&nbsp;<a href=\"https:\/\/www.nutrixeal.fr\/expertise\/carence-vitamine-d-symptomes-solutions\/\">carence en vitamine D<\/a> se confirme par un dosage sanguin. C&rsquo;est le seul moyen d&rsquo;y voir clair, et l&rsquo;avis de votre m\u00e9decin reste la meilleure boussole pour interpr\u00e9ter le r\u00e9sultat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour la vitamine K2, la situation diff\u00e8re&nbsp;: le besoin quotidien est g\u00e9n\u00e9ralement couvert par les l\u00e9gumes verts. Son int\u00e9r\u00eat en suppl\u00e9mentation tient surtout \u00e0 son association avec la vitamine D sur le terrain osseux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Maintenir un statut correct toute l&rsquo;ann\u00e9e suppose donc de la r\u00e9gularit\u00e9 plut\u00f4t que des cures ponctuelles. C&rsquo;est une bonne habitude \u00e0 prendre pour votre sant\u00e9 osseuse, au m\u00eame titre qu&rsquo;une alimentation vari\u00e9e.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-813dce31\"><h2 class=\"uagb-heading-text\">Comment choisir le bon compl\u00e9ment&nbsp;?<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-55b02201\"><h3 class=\"uagb-heading-text\">Le ratio D3:K2 id\u00e9al<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Aucun ratio officiel n&rsquo;existe, et c&rsquo;est un point que les \u00e9tiquettes pr\u00e9sentent parfois avec plus d&rsquo;assurance que la science ne le permet. Les formules du march\u00e9 associent le plus souvent quelques microgrammes de m\u00e9naquinone pour chaque microgramme de vitamine D3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;ordre de grandeur habituel se situe autour de 30 \u00b5g de m\u00e9naquinone pour 25 \u00b5g de vitamine D3, soit 1 000 UI. Ce n&rsquo;est pas une norme, mais un usage qui refl\u00e8te les quantit\u00e9s retenues dans les travaux disponibles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le point important n&rsquo;est pas le ratio en lui-m\u00eame, mais le fait que chaque vitamine atteigne la quantit\u00e9 utile \u00e0 une action optimale. Un produit qui affiche fi\u00e8rement sa m\u00e9naquinone \u00e0 dose symbolique n&rsquo;apporte rien, quel que soit le ratio annonc\u00e9.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-e10a5272\"><h3 class=\"uagb-heading-text\">Biodisponibilit\u00e9 et formes actives<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Pour la vitamine D, la forme D3 est mieux utilis\u00e9e par l&rsquo;organisme que la D2. Elle est aujourd&rsquo;hui propos\u00e9e en version adapt\u00e9e aux v\u00e9g\u00e9tariens, obtenue \u00e0 partir du lichen, sans rien changer \u00e0 son efficacit\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour la vitamine K2, privil\u00e9giez la MK-7, dont la pr\u00e9sence dans le sang se prolonge apr\u00e8s la prise. V\u00e9rifiez aussi qu&rsquo;il s&rsquo;agit bien de la forme trans, la seule active, une information que les bons fabricants indiquent noir sur blanc.<\/p>\n\n\n\r\n<section class=\"article-callout article-callout--takeaway panel summary-box\">\r\n\r\n    <div class=\"article-callout__header\">\r\n      <span class=\"article-callout__icon\" aria-hidden=\"true\">\r\n                  <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n            <path d=\"M5.14286 14C4.41735 12.8082 4 11.4118 4 9.91886C4 5.54539 7.58172 2 12 2C16.4183 2 20 5.54539 20 9.91886C20 11.4118 19.5827 12.8082 18.8571 14\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\"\/>\r\n            <path d=\"M7.38287 17.0982C7.291 16.8216 7.24507 16.6833 7.25042 16.5713C7.26174 16.3343 7.41114 16.1262 7.63157 16.0405C7.73579 16 7.88105 16 8.17157 16H15.8284C16.119 16 16.2642 16 16.3684 16.0405C16.5889 16.1262 16.7383 16.3343 16.7496 16.5713C16.7549 16.6833 16.709 16.8216 16.6171 17.0982C16.4473 17.6094 16.3624 17.8651 16.2315 18.072C15.9572 18.5056 15.5272 18.8167 15.0306 18.9408C14.7935 19 14.525 19 13.9881 19H10.0119C9.47495 19 9.2065 19 8.96944 18.9408C8.47283 18.8167 8.04281 18.5056 7.7685 18.072C7.63755 17.8651 7.55266 17.6094 7.38287 17.0982Z\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M15 19L14.8707 19.6466C14.7293 20.3537 14.6586 20.7072 14.5001 20.9866C14.2552 21.4185 13.8582 21.7439 13.3866 21.8994C13.0816 22 12.7211 22 12 22C11.2789 22 10.9184 22 10.6134 21.8994C10.1418 21.7439 9.74484 21.4185 9.49987 20.9866C9.34144 20.7072 9.27073 20.3537 9.12932 19.6466L9 19\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M12 16V11\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n          <\/svg>\r\n                <\/span>\r\n\r\n      <p class=\"article-callout__title\">\r\n        Bon \u00e0 savoir      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"article-callout__content\">\r\n      \n<p class=\"wp-block-paragraph\">Ces deux vitamines sont liposolubles. Une prise au cours d&rsquo;un repas contenant des mati\u00e8res grasses, favorise une bonne assimilation.<\/p>\n    <\/div>\r\n\r\n<\/section>\n\n\n<p class=\"wp-block-paragraph\">La question de l&rsquo;origine m\u00e9rite aussi d&rsquo;\u00eatre pos\u00e9e&nbsp;: une m\u00e9naquinone d&rsquo;origine naturelle, obtenue par fermentation, constitue la r\u00e9f\u00e9rence du march\u00e9, et les fabricants s\u00e9rieux le pr\u00e9cisent sur l&#8217;emballage.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-b0ce0652\"><h3 class=\"uagb-heading-text\">Crit\u00e8res de qualit\u00e9 d&rsquo;un compl\u00e9ment<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Regardez d&rsquo;abord la composition compl\u00e8te. Les meilleurs produits tiennent en peu d&rsquo;ingr\u00e9dients&nbsp;: les deux vitamines, l&rsquo;enveloppe des g\u00e9lules. Les additifs de confort n&rsquo;apportent rien \u00e0 la formule.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e9rifiez ensuite que les quantit\u00e9s sont exprim\u00e9es clairement, en microgrammes et en pourcentage des apports de r\u00e9f\u00e9rence. Une composition qui reste vague sur ce point m\u00e9rite d&rsquo;\u00eatre \u00e9cart\u00e9e sans h\u00e9siter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les analyses disponibles constituent le troisi\u00e8me crit\u00e8re de qualit\u00e9, et pas le moins important pour votre sant\u00e9. Un fabricant qui publie ses contr\u00f4les et l&rsquo;origine de ses mati\u00e8res premi\u00e8res donne de quoi v\u00e9rifier ses affirmations, ce qui vaut mieux que n&rsquo;importe quels avis en ligne.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Enfin, comparez \u00e0 quantit\u00e9 \u00e9gale plut\u00f4t qu&rsquo;au prix affich\u00e9. Une bonne lecture de l&rsquo;\u00e9tiquette vaut tous les conseils de rayon&nbsp;: c&rsquo;est la seule fa\u00e7on de savoir ce que vous achetez r\u00e9ellement.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-50580ba7\"><h2 class=\"uagb-heading-text\">Posologie recommand\u00e9e et pr\u00e9cautions d&rsquo;usage<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Pour la vitamine D, la r\u00e9f\u00e9rence de 15 \u00b5g par jour sert de rep\u00e8re chez l&rsquo;adulte.<sup>[1]<\/sup> Les compl\u00e9ments proposent fr\u00e9quemment des dosages sup\u00e9rieurs, entre 50 et 90 \u00b5g, \u00e0 ajuster selon votre statut sanguin et l&rsquo;avis de votre m\u00e9decin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il est recommand\u00e9 de prendre ces vitamines au cours d&rsquo;un repas, afin de tirer parti de leur caract\u00e8re liposoluble. Le moment de la journ\u00e9e importe peu, la r\u00e9gularit\u00e9 beaucoup plus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une pr\u00e9caution est essentielle&nbsp;: la vitamine K interf\u00e8re avec les traitements anticoagulants de type antivitamine K. Si vous suivez ce type de traitement, un compl\u00e9ment qui en contient est contre-indiqu\u00e9 sans avis m\u00e9dical formel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Veillez \u00e0 ne pas d\u00e9passer les doses indiqu\u00e9es, en particulier pour la vitamine D, pour \u00e9viter des apports excessifs sur le long terme. En cas de doute, l&rsquo;avis d&rsquo;un professionnel de sant\u00e9 permet d&rsquo;ajuster sans se tromper.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une suppl\u00e9mentation s&rsquo;inscrit dans le cadre d&rsquo;une alimentation vari\u00e9e et d&rsquo;un mode de vie sain. Elle compl\u00e8te de bonnes habitudes, elle ne les remplace pas&nbsp;: c&rsquo;est l\u00e0 que se joue l&rsquo;essentiel de votre bien-\u00eatre au fil des ans.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-3208350f\"><h2 class=\"uagb-heading-text\">Foire aux questions sur la vitamine D3 et K2<\/h2><\/div>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1787821008581\"><strong class=\"schema-faq-question\">La vitamine D3 est-elle suffisante seule&nbsp;?<\/strong> <p class=\"schema-faq-answer\">Oui, pour ce qui la concerne. Un\u00a0<a href=\"https:\/\/www.nutrixeal.fr\/67-vitamine-d3-vegetarienne\">compl\u00e9ment alimentaire de vitamine D3<\/a>\u00a0seul contribue au maintien d&rsquo;une ossature normale. Ajouter de la vitamine K2 vise l&rsquo;\u00e9tape suivante, celle de la fixation du calcium.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1787821042925\"><strong class=\"schema-faq-question\">Quelle est la meilleure forme de K2&nbsp;?<\/strong> <p class=\"schema-faq-answer\">La MK-7, ou m\u00e9naquinone-7, issue de la fermentation. Elle reste plus longtemps disponible dans l&rsquo;organisme que la MK-4, ce qui permet une prise quotidienne unique et des effets r\u00e9guliers.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1787821042399\"><strong class=\"schema-faq-question\">Peut-on combiner D3-K2 avec d&rsquo;autres suppl\u00e9ments&nbsp;?<\/strong> <p class=\"schema-faq-answer\">Oui, aucune interaction probl\u00e9matique n&rsquo;est connue avec les compl\u00e9ments alimentaires courants en nutrition. La seule vraie contre-indication concerne les traitements anticoagulants, \u00e0 cause de la vitamine K.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1787821081213\"><strong class=\"schema-faq-question\">Comment savoir si mon suppl\u00e9ment est efficace&nbsp;?<\/strong> <p class=\"schema-faq-answer\">Par un dosage sanguin, \u00e0 distance du d\u00e9but de la prise. C&rsquo;est la seule mesure objective de l&rsquo;efficacit\u00e9&nbsp;: aucune sensation ne permet de juger d&rsquo;une suppl\u00e9mentation en vitamines.<\/p> <\/div> <\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-dbf66034\"><h2 class=\"uagb-heading-text\">Sources<\/h2><\/div>\n\n\n\n<ol class=\"wp-block-list\">\n<li>ANSES. Les r\u00e9f\u00e9rences nutritionnelles en vitamines et min\u00e9raux. Rapport d&rsquo;expertise collective, 2021.<\/li>\n\n\n\n<li>ANSES. \u00c9tude individuelle nationale des consommations alimentaires INCA 3. Rapport d&rsquo;expertise collective, 2017.<\/li>\n<\/ol>\n\n\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>La vitamine D3 est bien connue, la vitamine K2 beaucoup moins. Pourtant, les deux se retrouvent de plus en plus souvent dans le m\u00eame compl\u00e9ment alimentaire. Ce duo n&rsquo;est pas un argument marketing&nbsp;: il repose sur la fa\u00e7on dont ces vitamines interviennent, chacune \u00e0 son niveau, sur le trajet du calcium dans l&rsquo;organisme. Pourquoi associer [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1254,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","nutrixeal_featured":false,"nutrixeal_most_read":false,"footnotes":""},"categories":[36],"tags":[],"class_list":["post-1246","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles-vitamine-d"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Synergie Vitamine D3 K2 : Le duo essentiel pour vos os<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez la synergie vitamine D3 K2 : renforcez vos os et votre c\u0153ur. 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scientifique Nutrixeal","author_link":"https:\/\/www.nutrixeal.fr\/expertise\/author\/equipe-scientifique\/"},"uagb_comment_info":0,"uagb_excerpt":"La vitamine D3 est bien connue, la vitamine K2 beaucoup moins. Pourtant, les deux se retrouvent de plus en plus souvent dans le m\u00eame compl\u00e9ment alimentaire. Ce duo n&rsquo;est pas un argument marketing&nbsp;: il repose sur la fa\u00e7on dont ces vitamines interviennent, chacune \u00e0 son niveau, sur le trajet du calcium dans l&rsquo;organisme. Pourquoi associer\u2026","_links":{"self":[{"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/posts\/1246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/comments?post=1246"}],"version-history":[{"count":4,"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/posts\/1246\/revisions"}],"predecessor-version":[{"id":1534,"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/posts\/1246\/revisions\/1534"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/media\/1254"}],"wp:attachment":[{"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/media?parent=1246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/categories?post=1246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nutrixeal.fr\/expertise\/wp-json\/wp\/v2\/tags?post=1246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}