{"id":75847,"date":"2026-07-09T17:15:00","date_gmt":"2026-07-09T20:15:00","guid":{"rendered":"https:\/\/www.tuasaude.com\/news\/?p=75847"},"modified":"2026-07-08T16:05:45","modified_gmt":"2026-07-08T19:05:45","slug":"caibras-noturnas-nao-sao-so-potassio-a-deficiencia-de-magnesio-tambem-pode-afetar-musculos-e-ritmo-cardiaco","status":"publish","type":"post","link":"https:\/\/www.tuasaude.com\/news\/2026\/07\/09\/caibras-noturnas-nao-sao-so-potassio-a-deficiencia-de-magnesio-tambem-pode-afetar-musculos-e-ritmo-cardiaco\/","title":{"rendered":"C\u00e3ibras noturnas n\u00e3o s\u00e3o s\u00f3 pot\u00e1ssio: a defici\u00eancia de magn\u00e9sio tamb\u00e9m pode afetar m\u00fasculos e ritmo card\u00edaco"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Sentir <strong>c\u00e3ibras noturnas<\/strong> n\u00e3o significa sempre falta de pot\u00e1ssio. O <strong>magn\u00e9sio<\/strong> tamb\u00e9m participa da contra\u00e7\u00e3o e do relaxamento muscular, al\u00e9m de influenciar a condu\u00e7\u00e3o el\u00e9trica do cora\u00e7\u00e3o. Quando est\u00e1 baixo, pode favorecer espasmos, fraqueza, tremores e, em situa\u00e7\u00f5es mais importantes, altera\u00e7\u00f5es no ritmo card\u00edaco.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Por que o magn\u00e9sio afeta os m\u00fasculos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O magn\u00e9sio ajuda as c\u00e9lulas musculares a controlar a entrada e a sa\u00edda de minerais envolvidos na contra\u00e7\u00e3o, como c\u00e1lcio e pot\u00e1ssio. Quando esse equil\u00edbrio falha, o m\u00fasculo pode ficar mais irrit\u00e1vel e contrair de forma involunt\u00e1ria, causando dor e rigidez.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Segundo o <a href=\"https:\/\/ods.od.nih.gov\/factsheets\/Magnesium-HealthProfessional\/\" target=\"_blank\" rel=\"noreferrer noopener\">NIH Office of Dietary Supplements<\/a>, a defici\u00eancia importante de magn\u00e9sio pode causar <strong>c\u00e3ibras, contra\u00e7\u00f5es musculares, dorm\u00eancia, formigamento, convuls\u00f5es e ritmos card\u00edacos anormais<\/strong>. Por isso, sintomas persistentes merecem avalia\u00e7\u00e3o, principalmente em pessoas com fatores de risco.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"558\" src=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_imgp43imgp43imgp-1024x558.jpg\" alt=\"O magn\u00e9sio participa do relaxamento muscular e da condu\u00e7\u00e3o el\u00e9trica do cora\u00e7\u00e3o.\" class=\"wp-image-76098\" srcset=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_imgp43imgp43imgp-1024x558.jpg 1024w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_imgp43imgp43imgp-300x164.jpg 300w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_imgp43imgp43imgp-768x419.jpg 768w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_imgp43imgp43imgp-750x409.jpg 750w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_imgp43imgp43imgp-1140x622.jpg 1140w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_imgp43imgp43imgp.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">O magn\u00e9sio participa do relaxamento muscular e da condu\u00e7\u00e3o el\u00e9trica do cora\u00e7\u00e3o.<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Sinais que podem indicar magn\u00e9sio baixo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A suspeita aumenta quando as c\u00e3ibras aparecem com outros sintomas musculares, neurol\u00f3gicos ou card\u00edacos. O padr\u00e3o repetido \u00e9 mais importante do que um epis\u00f3dio isolado ap\u00f3s exerc\u00edcio ou desidrata\u00e7\u00e3o.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>C\u00e3ibras nas pernas \u00e0 noite<\/strong>, espasmos ou tremores frequentes;<\/li>\n\n\n\n<li>Fraqueza muscular, fadiga ou sensa\u00e7\u00e3o de corpo pesado;<\/li>\n\n\n\n<li>Formigamento, dorm\u00eancia ou contra\u00e7\u00f5es involunt\u00e1rias;<\/li>\n\n\n\n<li>Palpita\u00e7\u00f5es, batimentos irregulares ou sensa\u00e7\u00e3o de cora\u00e7\u00e3o acelerado;<\/li>\n\n\n\n<li>Hist\u00f3rico de diarreia cr\u00f4nica, alcoolismo, diabetes ou uso de diur\u00e9ticos.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Estudo cient\u00edfico sobre magn\u00e9sio e c\u00e3ibras<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A revis\u00e3o sistem\u00e1tica <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/32956536\/\" target=\"_blank\" rel=\"noreferrer noopener\"><em>Magnesium for skeletal muscle cramps<\/em><\/a>, publicada na <em>Cochrane Database of Systematic Reviews<\/em>, avaliou estudos sobre o uso de magn\u00e9sio para c\u00e3ibras musculares em diferentes grupos de pessoas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os autores conclu\u00edram que a suplementa\u00e7\u00e3o n\u00e3o mostrou benef\u00edcio consistente para c\u00e3ibras em adultos mais velhos, e as evid\u00eancias foram incertas em outras situa\u00e7\u00f5es. Isso refor\u00e7a que n\u00e3o se deve tomar magn\u00e9sio por conta pr\u00f3pria para qualquer c\u00e3ibra, porque a causa pode ser vascular, neurol\u00f3gica, medicamentosa, metab\u00f3lica ou relacionada a outros minerais.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quem tem maior risco de defici\u00eancia<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A falta de magn\u00e9sio pode ocorrer por baixa ingest\u00e3o, perda excessiva ou dificuldade de absor\u00e7\u00e3o. Algumas pessoas precisam de mais aten\u00e7\u00e3o porque t\u00eam maior chance de apresentar n\u00edveis baixos ao longo do tempo.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pessoas com diarreia cr\u00f4nica, doen\u00e7a cel\u00edaca ou doen\u00e7a de Crohn;<\/li>\n\n\n\n<li>Quem usa diur\u00e9ticos, alguns antibi\u00f3ticos ou rem\u00e9dios para reduzir acidez por muito tempo;<\/li>\n\n\n\n<li>Pessoas com diabetes tipo 2, principalmente quando h\u00e1 urina em excesso;<\/li>\n\n\n\n<li>Consumo elevado de \u00e1lcool, que aumenta perdas e reduz a absor\u00e7\u00e3o;<\/li>\n\n\n\n<li>Idosos, que podem ingerir menos magn\u00e9sio e absorver pior o mineral.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"422\" src=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/convertido-270-1024x422.jpg\" alt=\"C\u00e3ibras Noturnas e Magn\u00e9sio Baixo: Sinais Al\u00e9m do Pot\u00e1ssio\" class=\"wp-image-76094\" srcset=\"https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/convertido-270-1024x422.jpg 1024w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/convertido-270-300x124.jpg 300w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/convertido-270-768x316.jpg 768w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/convertido-270-750x309.jpg 750w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/convertido-270-1140x469.jpg 1140w, https:\/\/www.tuasaude.com\/news\/wp-content\/uploads\/2026\/07\/convertido-270.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">C\u00e3ibras Noturnas e Magn\u00e9sio Baixo: Sinais Al\u00e9m do Pot\u00e1ssio<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Como investigar e cuidar<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Se as c\u00e3ibras forem frequentes, vierem com palpita\u00e7\u00f5es, fraqueza importante, desmaios, dorm\u00eancia ou uso de rem\u00e9dios que alteram minerais, o ideal \u00e9 procurar avalia\u00e7\u00e3o m\u00e9dica. O profissional pode solicitar exames de magn\u00e9sio, pot\u00e1ssio, c\u00e1lcio, fun\u00e7\u00e3o renal, glicose e revisar medicamentos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Alimentos como folhas verdes, feij\u00f5es, lentilha, sementes, castanhas, aveia e cacau ajudam a aumentar a ingest\u00e3o. Veja tamb\u00e9m mais detalhes sobre <a href=\"https:\/\/www.tuasaude.com\/magnesio\/\" target=\"_blank\" rel=\"noreferrer noopener\">magn\u00e9sio<\/a> e suas principais fontes, mas s\u00f3 use suplementos com orienta\u00e7\u00e3o, especialmente se houver doen\u00e7a renal.<\/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>Sentir c\u00e3ibras noturnas n\u00e3o significa sempre falta de pot\u00e1ssio. O magn\u00e9sio tamb\u00e9m participa da contra\u00e7\u00e3o e do relaxamento muscular, al\u00e9m de influenciar a condu\u00e7\u00e3o el\u00e9trica do cora\u00e7\u00e3o. Quando est\u00e1 baixo, pode favorecer espasmos, fraqueza, tremores e, em situa\u00e7\u00f5es mais importantes, altera\u00e7\u00f5es no ritmo card\u00edaco. Por que o magn\u00e9sio afeta os m\u00fasculos O magn\u00e9sio ajuda as [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":76099,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"magn\u00e9sio","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Magn\u00e9sio baixo pode causar c\u00e3ibras noturnas, fraqueza e palpita\u00e7\u00f5es. Veja sinais de risco, estudo sobre suplementa\u00e7\u00e3o e quando investigar.","jnews-multi-image_gallery":[],"jnews_single_post":{"format":"standard"},"jnews_primary_category":[],"jnews_social_meta":[],"jnews_override_counter":[],"footnotes":""},"categories":[111],"tags":[2062,2265,6905],"class_list":["post-75847","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-saude","tag-caibras-noturnas","tag-deficiencia-de-magnesio","tag-ritmo-cardiaco"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00e3ibras noturnas n\u00e3o s\u00e3o s\u00f3 pot\u00e1ssio: a defici\u00eancia de magn\u00e9sio tamb\u00e9m pode afetar m\u00fasculos e ritmo card\u00edaco - Tua Sa\u00fade<\/title>\n<meta name=\"description\" content=\"Magn\u00e9sio baixo pode causar c\u00e3ibras noturnas, fraqueza e palpita\u00e7\u00f5es. 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