{"id":47004,"date":"2025-12-15T13:44:19","date_gmt":"2025-12-15T05:44:19","guid":{"rendered":"https:\/\/www.sgnutri.com\/?p=47004"},"modified":"2026-01-23T16:46:36","modified_gmt":"2026-01-23T08:46:36","slug":"combien-de-temps-les-vitamines-b-restent-elles-dans-lorganisme","status":"publish","type":"post","link":"https:\/\/www.sgnutri.com\/fr\/combien-de-temps-les-vitamines-b-restent-elles-dans-lorganisme\/","title":{"rendered":"Combien de temps les vitamines B restent-elles dans l'organisme ?"},"content":{"rendered":"<div class=\"wp-block-themepark-block-themepark-wright content-super-p  blog-jiange\" style=\"font-size:17px;line-height:28px;color:#211c1c;padding:10px 20px;\">\n<div class=\"wp-block-column\">\n<p>Les vitamines B hydrosolubles (notamment B1, B2, B3, B6, biotine et folate) ne restent dans l'organisme que 24 \u00e0 48 heures. Comme l'organisme ne peut pas stocker ces vitamines en grandes quantit\u00e9s, vos reins travailleront tr\u00e8s efficacement, filtrant l'exc\u00e8s et l'excr\u00e9tant par l'urine. Cela signifie que si vous vous inqui\u00e9tez de la dose r\u00e9cente ou des effets secondaires, il vous suffit de boire beaucoup d'eau pour acc\u00e9l\u00e9rer le processus m\u00e9tabolique.<\/p>\n\n\n\n<p>Il n'y a qu'un seul cas particulier qui doit \u00eatre pr\u00e9lev\u00e9 s\u00e9par\u00e9ment, c'est celui de la vitamine B12. Elle peut \u00eatre stock\u00e9e dans le foie pendant 3 \u00e0 5 ans. Mais cela ne signifie pas que toutes les vitamines B12 que vous prenez dureront aussi longtemps, car la partie non absorb\u00e9e du suppl\u00e9ment est g\u00e9n\u00e9ralement excr\u00e9t\u00e9e au cours de la fen\u00eatre de 48 heures.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Water-Soluble_B_Vitamins\"><\/span>Vitamines B hydrosolubles<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La principale raison pour laquelle la plupart des vitamines B quittent si rapidement l'organisme est leur nature chimique : elles sont hydrosolubles. Les vitamines liposolubles se lient \u00e0 la boule de graisse et s'accumulent dans les tissus corporels pendant une longue p\u00e9riode ; une fois que les vitamines hydrosolubles p\u00e9n\u00e8trent dans le sang, elles se dissolvent imm\u00e9diatement.<\/p>\n\n\n\n<p>\u00c9tant donn\u00e9 que la majeure partie de notre corps est constitu\u00e9e d'eau, ces nutriments circulent tr\u00e8s rapidement. Une fois que l'organisme a absorb\u00e9 la quantit\u00e9 n\u00e9cessaire au maintien des fonctions m\u00e9taboliques imm\u00e9diates, il ne dispose pas d'une \"tirelire\" suppl\u00e9mentaire pour stocker le reste (\u00e0 l'exception de la B12 que nous venons de mentionner). Ainsi, les vitamines telles que la vitamine B6, la thiamine (B1) et la niacine (B3) ont des demi-vies biologiques tr\u00e8s courtes. En g\u00e9n\u00e9ral, le cycle complet est termin\u00e9 en un jour ou deux. Cela explique \u00e9galement pourquoi nous insistons toujours sur la n\u00e9cessit\u00e9 d'une \"suppl\u00e9mentation quotidienne\" en vitamines B, mais d'un autre point de vue, cela leur conf\u00e8re \u00e9galement un risque d'accumulation toxique \u00e0 long terme beaucoup plus faible que celui d'autres vitamines.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"665\" height=\"434\" src=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2025\/12\/image-23.png\" alt=\"Vitamines B\" class=\"wp-image-47006\" srcset=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2025\/12\/image-23.png 665w, https:\/\/www.sgnutri.com\/wp-content\/uploads\/2025\/12\/image-23-300x196.png 300w, https:\/\/www.sgnutri.com\/wp-content\/uploads\/2025\/12\/image-23-18x12.png 18w\" sizes=\"auto, (max-width: 665px) 100vw, 665px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Excessive_B_Vitamins_Can_Turn_Urine_Yellow\"><\/span>Un exc\u00e8s de vitamines B peut jaunir l'urine<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>L'un des signes les plus \u00e9vidents que les vitamines B quittent votre corps est le changement de couleur de votre urine. Il s'agit d'un ph\u00e9nom\u00e8ne clinique tr\u00e8s typique. Les reins agissent comme un syst\u00e8me de filtration. Lorsqu'ils d\u00e9tectent que les vitamines B - en particulier la riboflavine (vitamine B2) - pr\u00e9sentes dans le sang d\u00e9passent la capacit\u00e9 de l'organisme \u00e0 les absorber, ils filtrent l'exc\u00e8s dans la vessie. La riboflavine contient des sortes de pigments fluorescents naturels qui, m\u00eame si la quantit\u00e9 rejet\u00e9e est faible, peuvent donner \u00e0 l'urine une couleur jaune vif, voire jaune n\u00e9on. De nombreux patients atteints pour la premi\u00e8re fois de la maladie B seront choqu\u00e9s de voir cela, mais c'est tout \u00e0 fait inoffensif. Au contraire, c'est un bon signe : Vos reins fonctionnent normalement. Votre corps a absorb\u00e9 ce dont il a besoin et \u00e9limine ce dont il n'a pas besoin. Les vitamines circulent activement dans votre syst\u00e8me m\u00e9tabolique.<\/p>\n\n\n\n<section class=\"wp-block-themepark-block-themepark-area block_layout thempark-block undefined\" id=\"maxw\" style=\"padding-bottom:90px;padding-top:88px;\" data-swiper-parallax=\"-700\"><div class=\"block_layout_in clomnsmal  clomnnone\" style=\"\">\n<div class=\"wp-block-column block_layout_in\">\n<div class=\"wp-block-columns\">\n<div class=\"wp-block-column\" style=\"flex-basis:6%\"><\/div>\n\n\n\n<div class=\"wp-block-column\" style=\"flex-basis:40%\">\n<div class=\"wp-block-themepark-block-themepark-wright content-super-p\" style=\"font-size:15px;line-height:26px;color:#ffffff;padding:10px 0px;\">\n<div class=\"wp-block-column\">\n<div class=\"wp-block-columns\">\n<div class=\"wp-block-column\" style=\"flex-basis:3%\">\n<div class=\"wp-block-themepark-block-themepark-xian theme_fang_out\" style=\"text-align:left;\"><div class=\"fangbox\" style=\"width:5px;height:34px;background-color:#ffffff;\"><\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column\">\n<h2 class=\"wp-block-heading has-monte-white-color has-text-color has-link-color wp-elements-cadcb545e001f4268222dfd05a4aa22b\" style=\"font-size:32px\"><span class=\"ez-toc-section\" id=\"To_the_forefront_of_nutrition\"><\/span>\u00c0 la pointe de la nutrition<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-cyan-bluish-gray-color has-text-color has-link-color wp-elements-69c6a1690c2b4680e7cf817191470e48\">Fournir des solutions innovantes qui am\u00e9liorent la saveur, la texture et le profil nutritionnel des aliments, en soutenant des produits plus sains et durables pour l'industrie alimentaire.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns\">\n<div class=\"wp-block-column\">\n<section class=\"wp-block-themepark-block-themepark-area block_layout thempark-block undefined  radius-border20 product-hover\" id=\"\" style=\"height:325px;box-sizing: border-box;width: 100%;\" data-swiper-parallax=\"-700\"><div class=\"block_layout_in\" style=\"\">\n<div class=\"wp-block-column block_layout_in\">\n<div style=\"height:241px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-themepark-block-themepark-wright content-super-p\" style=\"font-size:12px;line-height:20px;padding:10px 10px;\">\n<div class=\"wp-block-column\">\n<div class=\"wp-block-themepark-block-btn themepark-i-btn-out shadow  productfenleianniu\" style=\"text-align:center;\"><div class=\"themepark-i-btn-out_ins\" style=\"\"><div class=\"themepark-i-btn-out_in\"><div class=\"themepark-i-btn\" style=\"background-color:#ffffff;color:#080808;font-size:16px;border:solid 1px #ccc;border-radius:3px;padding:10px 72px;\"><a href=\"https:\/\/www.sgnutri.com\/fr\/categorie\/tous-les-produits\/fibres-solubles\/\" rel=\"noopener noreferrer \">En savoir plus<\/a><a class=\"hovers\" data-title=\"Learn More\" style=\"color:#2a2a2a;background-color:#ffffff;padding:10px 72px;border-radius:3px;\" href=\"https:\/\/www.sgnutri.com\/fr\/categorie\/tous-les-produits\/fibres-solubles\/\" rel=\"noopener noreferrer\" target=\"_self\"><\/a><\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><div class=\"layout_badh\"><div class=\"PcOnly themepark-block_layout_ba lazyload swiper-lazy\" style=\"background-repeat:no-repeat;background-size:cover;background-position:center;\" data-background=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2026\/01\/1116.png\"><\/div><\/div><\/section>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column\" style=\"flex-basis:20px\"><\/div>\n\n\n\n<div class=\"wp-block-column\">\n<div style=\"height:9px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<section class=\"wp-block-themepark-block-themepark-area block_layout thempark-block undefined  radius-border20 product-hover\" id=\"\" style=\"height:539px;box-sizing: border-box;width: 100%;\" data-swiper-parallax=\"-700\"><div class=\"block_layout_in\" style=\"\">\n<div class=\"wp-block-column block_layout_in\">\n<div style=\"height:443px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-themepark-block-themepark-wright content-super-p\" style=\"font-size:12px;line-height:20px;padding:10px 10px;\">\n<div class=\"wp-block-column\">\n<div class=\"wp-block-themepark-block-btn themepark-i-btn-out shadow  productfenleianniu\" style=\"text-align:center;\"><div class=\"themepark-i-btn-out_ins\" style=\"\"><div class=\"themepark-i-btn-out_in\"><div class=\"themepark-i-btn\" style=\"background-color:#ffffff;color:#080808;font-size:16px;border:solid 1px #ccc;border-radius:3px;padding:10px 18px;margin-bottom:16px;margin-top:16px;\"><a href=\"https:\/\/www.sgnutri.com\/fr\/categorie\/tous-les-produits\/prebiotique\/\" rel=\"noopener noreferrer \">En savoir plus<\/a><a class=\"hovers\" data-title=\"Learn More\" style=\"color:#2a2a2a;background-color:#ffffff;padding:10px 18px;border-radius:3px;\" href=\"https:\/\/www.sgnutri.com\/fr\/categorie\/tous-les-produits\/prebiotique\/\" rel=\"noopener noreferrer\" target=\"_self\"><\/a><\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><div class=\"layout_badh\"><div class=\"PcOnly themepark-block_layout_ba lazyload swiper-lazy\" style=\"background-repeat:no-repeat;background-size:cover;background-position:center;\" data-background=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2026\/01\/1119.png\"><\/div><\/div><\/section>\n<\/div>\n\n\n\n<div class=\"wp-block-column\" style=\"flex-basis:20px\"><\/div>\n\n\n\n<div class=\"wp-block-column\">\n<div style=\"height:9px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<section class=\"wp-block-themepark-block-themepark-area block_layout thempark-block undefined  radius-border20 product-hover\" id=\"\" style=\"height:260px;box-sizing: border-box;width: 100%;\" data-swiper-parallax=\"-700\"><div class=\"block_layout_in\" style=\"\">\n<div class=\"wp-block-column block_layout_in\">\n<div style=\"height:164px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-themepark-block-themepark-wright content-super-p\" style=\"font-size:12px;line-height:20px;padding:10px 10px;\">\n<div class=\"wp-block-column\">\n<div class=\"wp-block-themepark-block-btn themepark-i-btn-out shadow  productfenleianniu\" style=\"text-align:center;\"><div class=\"themepark-i-btn-out_ins\" style=\"\"><div class=\"themepark-i-btn-out_in\"><div class=\"themepark-i-btn\" style=\"background-color:#ffffff;color:#080808;font-size:16px;border:solid 1px #ccc;border-radius:3px;padding:7px 18px;margin-bottom:3px;margin-top:3px;\"><a href=\"https:\/\/www.sgnutri.com\/fr\/categorie\/tous-les-produits\/amidon-sucre\/\" rel=\"noopener noreferrer \">En savoir plus<\/a><a class=\"hovers\" data-title=\"Learn More\" style=\"color:#2a2a2a;background-color:#ffffff;padding:7px 18px;border-radius:3px;\" href=\"https:\/\/www.sgnutri.com\/fr\/categorie\/tous-les-produits\/amidon-sucre\/\" rel=\"noopener noreferrer\" target=\"_self\"><\/a><\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><div class=\"layout_badh\"><div class=\"PcOnly themepark-block_layout_ba lazyload swiper-lazy\" style=\"background-repeat:no-repeat;background-size:cover;background-position:center;\" data-background=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2026\/01\/1124.png\"><\/div><\/div><\/section>\n\n\n\n<div style=\"height:15px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<section class=\"wp-block-themepark-block-themepark-area block_layout thempark-block undefined  radius-border20 product-hover\" id=\"\" style=\"height:260px;box-sizing: border-box;width: 100%;\" data-swiper-parallax=\"-700\"><div class=\"block_layout_in\" style=\"\">\n<div class=\"wp-block-column block_layout_in\">\n<div style=\"height:164px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-themepark-block-themepark-wright content-super-p\" style=\"font-size:12px;line-height:20px;padding:10px 10px;\">\n<div class=\"wp-block-column\">\n<div class=\"wp-block-themepark-block-btn themepark-i-btn-out shadow  productfenleianniu\" style=\"text-align:center;\"><div class=\"themepark-i-btn-out_ins\" style=\"\"><div class=\"themepark-i-btn-out_in\"><div class=\"themepark-i-btn\" style=\"background-color:#ffffff;color:#080808;font-size:16px;border:solid 1px #ccc;border-radius:3px;padding:7px 18px;margin-bottom:3px;margin-top:3px;\"><a href=\"https:\/\/www.sgnutri.com\/fr\/categorie\/tous-les-produits\/amidon-sucre\/\" rel=\"noopener noreferrer \">En savoir plus<\/a><a class=\"hovers\" data-title=\"Learn More\" style=\"color:#2a2a2a;background-color:#ffffff;padding:7px 18px;border-radius:3px;\" href=\"https:\/\/www.sgnutri.com\/fr\/categorie\/tous-les-produits\/amidon-sucre\/\" rel=\"noopener noreferrer\" target=\"_self\"><\/a><\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><div class=\"layout_badh\"><div class=\"PcOnly themepark-block_layout_ba lazyload swiper-lazy\" style=\"background-repeat:no-repeat;background-size:cover;background-position:center;\" data-background=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2026\/01\/1126-1.png\"><\/div><\/div><\/section>\n<\/div>\n\n\n\n<div class=\"wp-block-column\" style=\"flex-basis:6%\"><\/div>\n<\/div>\n<\/div>\n<\/div><div class=\"layout_badh\"><div class=\"shizhezhao\" style=\"opacity:0.69;background-color:#272626;\"><\/div><div class=\"PcOnly themepark-block_layout_ba lazyload swiper-lazy\" style=\"background-repeat:no-repeat;background-size:cover;background-position:center;\" data-background=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2026\/01\/1104-1.png\"><\/div><\/div><\/section>\n\n\n\n<style>\n.radius-border20 {\n  border-radius: 20px;\n}\n\n.product-hover {\n  position: relative;\n  overflow: hidden;\n  cursor: pointer;\n  border-radius: 20px;\n  transition: box-shadow 0.4s ease, transform 0.3s ease;\n  box-shadow: 0 4px 12px rgba(0,0,0,0.08);\n}\n\n.product-hover:hover {\n  box-shadow:\n    \/* \u4e3b\u8272\u504f\u79fb\u5c64\uff08\u5be6\u5fc3\u504f\u79fb\uff09 *\/\n    5px 5px 0 var(--wp--preset--color--themecolor-1),\n    \n    \/* \u6539\u7528\u4e3b\u984c\u8272\u7684\u67d4\u548c\u5149\u6688\/\u6a21\u7cca\u5c64\uff08\u53d6\u4ee3\u539f\u672c\u7684\u767d\u8272 0.35\uff09 *\/\n    10px 10px 20px color-mix(in srgb, var(--wp--preset--color--themecolor-1) 25%, transparent),\n    \n    \/* \u6574\u9ad4\u9670\u5f71\u4e5f\u5e36\u4e00\u9ede\u4e3b\u984c\u8272\u8abf\uff08\u53d6\u4ee3\u7d14\u9ed1\uff09 *\/\n    0 10px 24px color-mix(in srgb, var(--wp--preset--color--themecolor-1) 12%, rgba(0,0,0,0.10));\n  \n  transform: translateY(-3px);\n}\n\n.product-hover:hover .themepark-i-btn {\n  background-color: var(--wp--preset--color--themecolor-1) !important;\n  color: #ffffff !important;\n  transition: all 0.3s ease;\n}\n\n.product-hover:hover .hovers {\n  background-color: var(--wp--preset--color--themecolor-1) !important;\n  color: #ffffff !important;\n}\n<\/style>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Accelerating_The_Flushing_Process_With_Hydration\"><\/span>Acc\u00e9l\u00e9rer le processus de rin\u00e7age gr\u00e2ce \u00e0 l'hydratation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Si vous vous sentez l\u00e9g\u00e8rement mal \u00e0 cause de la prise de fortes doses de vitamines B - comme les rougeurs de la peau provoqu\u00e9es par la niacine ou l'excitation nerveuse induite par le complexe B (jitters) - ce programme m\u00e9tabolique de \"24 \u00e0 48 heures\" peut en fait \u00eatre modifi\u00e9 artificiellement, et la cl\u00e9 est l'eau. \u00c9tant donn\u00e9 que la voie d'excr\u00e9tion d\u00e9pend presque enti\u00e8rement du syst\u00e8me urinaire, boire beaucoup d'eau aide directement les reins \u00e0 filtrer le sang. La d\u00e9shydratation ralentit la production d'urine et peut permettre \u00e0 ces m\u00e9tabolites de rester un peu plus longtemps dans l'organisme. Inversement, l'augmentation de la quantit\u00e9 d'eau que vous buvez accro\u00eet le volume et la fr\u00e9quence des mictions, ce qui ouvre effectivement une \"voie rapide\" pour les vitamines qui ne sont pas absorb\u00e9es. Cela confirme que pour la plupart des gens, le simple fait de rester hydrat\u00e9 est le moyen le plus efficace de g\u00e9rer et de raccourcir la dur\u00e9e de s\u00e9jour de ces vitamines dans l'organisme.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"678\" height=\"376\" src=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2025\/12\/image-22.png\" alt=\"L&#039;hydratation acc\u00e9l\u00e8re le processus et r\u00e9duit la dur\u00e9e de s\u00e9jour des vitamines dans l&#039;organisme.\" class=\"wp-image-47005\" srcset=\"https:\/\/www.sgnutri.com\/wp-content\/uploads\/2025\/12\/image-22.png 678w, https:\/\/www.sgnutri.com\/wp-content\/uploads\/2025\/12\/image-22-300x166.png 300w, https:\/\/www.sgnutri.com\/wp-content\/uploads\/2025\/12\/image-22-18x10.png 18w\" sizes=\"auto, (max-width: 678px) 100vw, 678px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_B12_Exception\"><\/span>L'exception B12<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La vitamine B12 (cobalamine) est en effet un groupe B h\u00e9t\u00e9rog\u00e8ne, et l'homme a d\u00e9velopp\u00e9 la capacit\u00e9 de la stocker dans le foie pour pr\u00e9venir les carences, et ces r\u00e9serves durent effectivement 3 \u00e0 5 ans. Toutefois, ce m\u00e9canisme de stockage est lent et \u00e9troitement r\u00e9gul\u00e9. Lorsque vous prenez un suppl\u00e9ment de B12 \u00e0 haute dose, votre corps ne peut pas (et ne doit pas) absorber tous les ingr\u00e9dients dans votre foie en une seule fois. Il n'absorbera qu'une partie de la capacit\u00e9 de traitement et le reste sera trait\u00e9 comme des \"vitamines B hydrosolubles\" ordinaires. Par cons\u00e9quent, si vous prenez un suppl\u00e9ment aujourd'hui, les \"parties non absorb\u00e9es\" ne resteront pas dans votre corps pendant plusieurs ann\u00e9es, mais seront toujours excr\u00e9t\u00e9es dans les 24 \u00e0 48 heures habituelles. Cette double nature explique pourquoi vous pouvez avoir des r\u00e9serves de B12 \u00e0 long terme tout en excr\u00e9tant l'exc\u00e8s de B12 dans votre urine quelques heures apr\u00e8s la prise d'un comprim\u00e9.<\/p>\n\n\n\n<p><strong>Auteur<\/strong>\uff1aDavid<\/p>\n\n\n\n<p>Je suis une chercheuse en sant\u00e9 qui se consacre \u00e0 la simplification de la science derri\u00e8re les suppl\u00e9ments. Mon travail se concentre sur le m\u00e9tabolisme et la biodisponibilit\u00e9 des nutriments, aidant les lecteurs \u00e0 comprendre exactement comment leur corps traite les vitamines telles que le complexe B. 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