{"id":61763,"date":"2026-06-17T11:50:00","date_gmt":"2026-06-17T14:50:00","guid":{"rendered":"https:\/\/www.tuasaude.com\/news\/?p=61763"},"modified":"2026-06-16T15:40:29","modified_gmt":"2026-06-16T18:40:29","slug":"falta-de-vitamina-b12-nao-afeta-so-energia-o-alerta-do-nih-para-idosos-vegetarianos-e-quem-usa-remedios-gastricos","status":"publish","type":"post","link":"https:\/\/www.tuasaude.com\/news\/2026\/06\/17\/falta-de-vitamina-b12-nao-afeta-so-energia-o-alerta-do-nih-para-idosos-vegetarianos-e-quem-usa-remedios-gastricos\/","title":{"rendered":"Falta de vitamina B12 n\u00e3o afeta s\u00f3 energia: o alerta do NIH para idosos, vegetarianos e quem usa rem\u00e9dios g\u00e1stricos"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A falta de <strong>vitamina B12<\/strong> costuma ser lembrada apenas quando h\u00e1 cansa\u00e7o, mas seus efeitos podem ir al\u00e9m da energia. Em idosos, vegetarianos, veganos e pessoas que usam rem\u00e9dios g\u00e1stricos por longos per\u00edodos, a defici\u00eancia pode afetar sangue, nervos, mem\u00f3ria, equil\u00edbrio e sensibilidade.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Por que a vitamina B12 importa<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A vitamina B12 participa da forma\u00e7\u00e3o das c\u00e9lulas do sangue, da produ\u00e7\u00e3o de DNA e da manuten\u00e7\u00e3o dos nervos. Quando est\u00e1 baixa, o corpo pode dar sinais discretos no come\u00e7o, como fadiga, fraqueza e falta de disposi\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Segundo o <a href=\"https:\/\/ods.od.nih.gov\/factsheets\/VitaminB12-HealthProfessional\/\" target=\"_blank\" rel=\"noreferrer noopener\">NIH Office of Dietary Supplements<\/a>, idosos, pessoas com anemia perniciosa, dist\u00farbios gastrointestinais, cirurgia no aparelho digestivo e dietas vegetarianas ou veganas t\u00eam maior risco de defici\u00eancia. O \u00f3rg\u00e3o tamb\u00e9m aponta que inibidores de \u00e1cido g\u00e1strico e metformina podem interferir na absor\u00e7\u00e3o da vitamina B12.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sinais que podem aparecer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A defici\u00eancia pode causar sintomas variados, porque a vitamina B12 atua tanto no sangue quanto no sistema nervoso. Em alguns casos, os sinais neurol\u00f3gicos aparecem mesmo antes de uma anemia evidente.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cansa\u00e7o intenso<\/strong>, fraqueza ou falta de ar aos esfor\u00e7os.<\/li>\n\n\n\n<li>Formigamento, dorm\u00eancia ou sensa\u00e7\u00e3o de queima\u00e7\u00e3o nas m\u00e3os e nos p\u00e9s.<\/li>\n\n\n\n<li>Tontura, desequil\u00edbrio ou dificuldade para caminhar.<\/li>\n\n\n\n<li>Palidez, l\u00edngua dolorida ou feridas na boca.<\/li>\n\n\n\n<li>Confus\u00e3o, mem\u00f3ria ruim, irritabilidade ou tristeza persistente.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/cdnnewsimg.tuasaude.com\/wp-content\/uploads\/2026\/06\/ChatGPT-Image-16-de-jun.-de-2026-15_32_21-1024x682.jpg\" alt=\"Dietas restritivas podem exigir aten\u00e7\u00e3o especial \u00e0 ingest\u00e3o e reposi\u00e7\u00e3o segura de vitamina B12.\" class=\"wp-image-61953\" srcset=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/ChatGPT-Image-16-de-jun.-de-2026-15_32_21-1024x682.jpg 1024w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/ChatGPT-Image-16-de-jun.-de-2026-15_32_21-300x200.jpg 300w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/ChatGPT-Image-16-de-jun.-de-2026-15_32_21-768x512.jpg 768w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/ChatGPT-Image-16-de-jun.-de-2026-15_32_21-750x500.jpg 750w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/ChatGPT-Image-16-de-jun.-de-2026-15_32_21-1140x760.jpg 1140w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/ChatGPT-Image-16-de-jun.-de-2026-15_32_21.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Dietas restritivas podem exigir aten\u00e7\u00e3o especial \u00e0 ingest\u00e3o e reposi\u00e7\u00e3o segura de vitamina B12.<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">O que diz o estudo cient\u00edfico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O uso prolongado de alguns rem\u00e9dios merece aten\u00e7\u00e3o porque a vitamina B12 presente nos alimentos depende do \u00e1cido do est\u00f4mago para ser liberada e absorvida. Por isso, medicamentos que reduzem a acidez podem contribuir para defici\u00eancia, especialmente quando somados a outros fatores de risco.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Segundo o estudo farmacovigilante <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/41149068\/\" target=\"_blank\" rel=\"noreferrer noopener\"><em>Vitamin B12 Deficiency Associated with Metformin and Proton Pump Inhibitors and Their Combinations: Results from a Disproportionality and Interaction Analysis<\/em><\/a>, publicado em 2025 na revista <em>Diseases<\/em>, metformina e inibidores da bomba de pr\u00f3tons foram associados a sinais de risco para defici\u00eancia de vitamina B12 em dados do sistema de eventos adversos da FDA. O estudo destacou maior aten\u00e7\u00e3o quando esses medicamentos s\u00e3o usados juntos, sobretudo em idosos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quem precisa ter mais aten\u00e7\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Alguns grupos devem conversar com o m\u00e9dico sobre a necessidade de exames, ajuste alimentar ou suplementa\u00e7\u00e3o. A decis\u00e3o depende do hist\u00f3rico, sintomas, dieta, medicamentos e resultados laboratoriais.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Idosos, especialmente com gastrite atr\u00f3fica ou baixa acidez no est\u00f4mago.<\/li>\n\n\n\n<li>Vegetarianos estritos, veganos e pessoas com baixa ingest\u00e3o de alimentos de origem animal.<\/li>\n\n\n\n<li>Quem usa omeprazol, pantoprazol ou outros rem\u00e9dios g\u00e1stricos por longo tempo.<\/li>\n\n\n\n<li>Pessoas em uso prolongado de metformina.<\/li>\n\n\n\n<li>Quem tem doen\u00e7a cel\u00edaca, Crohn, cirurgia bari\u00e1trica ou anemia perniciosa.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Para entender melhor sintomas, causas e formas de reposi\u00e7\u00e3o, veja tamb\u00e9m o conte\u00fado sobre <a href=\"https:\/\/www.tuasaude.com\/vitamina-b12-cobalamina\/\" target=\"_blank\" rel=\"noreferrer noopener\">vitamina B12<\/a> no Tua Sa\u00fade.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"441\" src=\"https:\/\/cdnnewsimg.tuasaude.com\/wp-content\/uploads\/2026\/06\/convertido-521-1024x441.jpg\" alt=\"Falta de Vitamina B12: Sinais que V\u00e3o Al\u00e9m do Cansa\u00e7o\" class=\"wp-image-61952\" srcset=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/convertido-521-1024x441.jpg 1024w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/convertido-521-300x129.jpg 300w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/convertido-521-768x331.jpg 768w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/convertido-521-750x323.jpg 750w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/convertido-521-1140x491.jpg 1140w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/06\/convertido-521.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Falta de Vitamina B12: Sinais que V\u00e3o Al\u00e9m do Cansa\u00e7o<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Quando investigar a defici\u00eancia<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A investiga\u00e7\u00e3o \u00e9 indicada quando h\u00e1 sintomas persistentes, dieta restritiva, uso cont\u00ednuo de rem\u00e9dios g\u00e1stricos, metformina ou doen\u00e7as que reduzem a absor\u00e7\u00e3o intestinal. O m\u00e9dico pode solicitar vitamina B12 no sangue e, em alguns casos, exames como hemograma, \u00e1cido metilmal\u00f4nico e homociste\u00edna.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e3o \u00e9 recomendado tomar doses altas por conta pr\u00f3pria, pois o tratamento ideal depende da causa. Algumas pessoas melhoram com comprimidos ou alimentos fortificados, enquanto outras podem precisar de reposi\u00e7\u00e3o em doses espec\u00edficas ou aplica\u00e7\u00e3o injet\u00e1vel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Este conte\u00fado \u00e9 apenas informativo e n\u00e3o substitui a avalia\u00e7\u00e3o de um m\u00e9dico.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A falta de vitamina B12 costuma ser lembrada apenas quando h\u00e1 cansa\u00e7o, mas seus efeitos podem ir al\u00e9m da energia. Em idosos, vegetarianos, veganos e pessoas que usam rem\u00e9dios g\u00e1stricos por longos per\u00edodos, a defici\u00eancia pode afetar sangue, nervos, mem\u00f3ria, equil\u00edbrio e sensibilidade. Por que a vitamina B12 importa A vitamina B12 participa da forma\u00e7\u00e3o [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":61984,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":{"format":"standard"},"jnews_primary_category":[],"jnews_social_meta":[],"jnews_override_counter":[],"footnotes":""},"categories":[111],"tags":[1182,2767,8712],"class_list":["post-61763","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-saude","tag-deficiencia-de-b12","tag-formigamento","tag-remedios-gastricos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Falta de vitamina B12 n\u00e3o afeta s\u00f3 energia: o alerta do NIH para idosos, vegetarianos e quem usa rem\u00e9dios g\u00e1stricos - Tua Sa\u00fade<\/title>\n<meta name=\"description\" content=\"Vitamina B12 baixa pode afetar energia, nervos e mem\u00f3ria. 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