{"id":303180,"date":"2026-06-29T17:00:16","date_gmt":"2026-06-29T17:00:16","guid":{"rendered":"http:\/\/6a428ff5adfefacec043b37f"},"modified":"2026-06-29T17:00:16","modified_gmt":"2026-06-29T17:00:16","slug":"los-suplementos-de-omega-3-no-protegen-tu-memoria-ni-previenen-el-alzheimer-sugiere-estudio","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=303180","title":{"rendered":"Los suplementos de Omega 3 no protegen tu memoria ni previenen el Alzheimer, sugiere estudio"},"content":{"rendered":"<p>Se cree que el \u00e1cido docosahexaenoico (DHA), un \u00e1cido graso Omega 3 abundante en pescados grasos como el salm\u00f3n y las sardinas, mejora la funci\u00f3n cognitiva al ayudar a conectar las c\u00e9lulas cerebrales. Sin embargo, no se ha demostrado en su totalidad si el DHA tomado como suplemento llega realmente al cerebro y tiene alg\u00fan efecto sobre la demencia.<\/p>\n<p>Un equipo de investigaci\u00f3n de la Facultad de Medicina de la Universidad del Sur de California (USC) public\u00f3 recientemente un <a href=\"https:\/\/www.thelancet.com\/journals\/EBIOM\/article\/PIIS2352-3964(26)00198-2\/fulltext\" target=\"_blank\">ensayo<\/a> cl\u00ednico a gran escala de dos a\u00f1os de duraci\u00f3n, dirigido a personas mayores con alto riesgo de <a href=\"https:\/\/es.wired.com\/articulos\/alzheimer-que-es-causas-sintomas-como-tratar-y-prevenir-la-enfermedad\">desarrollar Alzheimer<\/a>. Si bien las altas dosis de suplementos de DHA <a href=\"https:\/\/es.wired.com\/articulos\/el-cerebro-no-nace-siendo-un-lienzo-en-blanco\">llegan al cerebro<\/a>, no mostraron ning\u00fan efecto sobre la memoria, la funci\u00f3n cognitiva ni en la prevenci\u00f3n de la atrofia cerebral.<\/p>\n<p>\u00abTodos buscan una soluci\u00f3n milagrosa para prevenir el Alzheimer, pero no podemos afirmar con certeza que los suplementos de DHA protejan la <a href=\"https:\/\/es.wired.com\/articulos\/un-antiguo-circuito-cerebral-podria-abrir-nuevas-vias-para-tratar-el-tdah-y-el-autismo\">salud cerebral\u00bb<\/a>, explica Hussein Naj Yassin, director del Centro de Salud Cerebral Personalizada de la USC. A\u00f1ade: \u00abLos \u00e1cidos grasos Omega 3 desempe\u00f1an sin duda un papel importante en la formaci\u00f3n de las conexiones entre las c\u00e9lulas cerebrales necesarias para <a href=\"https:\/\/es.wired.com\/articulos\/tu-cerebro-no-anticipa-un-solo-futuro-sino-varios-y-calcula-cual-es-el-mas-satisfactorio\">la funci\u00f3n cognitiva.<\/a> Sin embargo, no existen fundamentos para recomendar los suplementos de aceite de pescado como medida preventiva contra el Alzheimer\u00bb.<\/p>\n<h2>Qu\u00e9 dice el estudio<\/h2>\n<p>Yassin y su equipo de investigaci\u00f3n llevaron a cabo un ensayo controlado aleatorizado, doble ciego y controlado con placebo, en el que participaron 365 hombres y mujeres de entre 55 y 80 a\u00f1os que rara vez <a href=\"https:\/\/es.wired.com\/articulos\/sabes-cual-es-el-origen-del-platillo-de-mariscos-que-pides-en-un-restaurante-en-mexico-nadie-sabe-con-certeza\">consum\u00edan pescado.<\/a> Aproximadamente la mitad (47%) de los participantes portaban el alelo \u00abAPOE \u03b54\u00bb, el mayor factor de riesgo gen\u00e9tico para el Alzheimer de aparici\u00f3n tard\u00eda, y todos consum\u00edan menos de 200 mg de DHA al d\u00eda en su dieta.<\/p>\n<p><strong>Los participantes fueron divididos aleatoriamente en dos grupos: un grupo recibi\u00f3 un suplemento con 2000 mg de DHA, mientras que el otro grupo recibi\u00f3 un placebo con una sustancia simulada durante 24 meses.<\/strong> El placebo era una mezcla de aceite de ma\u00edz y aceite de soja, y su aspecto, sabor y olor eran indistinguibles de los del suplemento de DHA. Ni los participantes ni sus m\u00e9dicos sab\u00edan qu\u00e9 suplemento estaban recibiendo.<\/p>\n<p>Los investigadores se centraron primero en determinar si el DHA llega realmente al cerebro. Midiendo la concentraci\u00f3n de DHA en el l\u00edquido cefalorraqu\u00eddeo (LCR) que rodea el cerebro, observaron un aumento del 17% en el grupo que recibi\u00f3 DHA despu\u00e9s de seis meses. No se encontraron diferencias en la administraci\u00f3n entre quienes portaban y quienes no portaban el alelo APOE \u03b54, lo que confirma directamente que los suplementos de DHA en dosis altas llegan al cerebro en personas mayores sin demencia, independientemente de la presencia del alelo APOE \u03b54.<\/p>\n<p>Sin embargo, los efectos sobre la funci\u00f3n cognitiva y la estructura cerebral fueron contradictorios. Una prueba de memoria y capacidad cognitiva (RBANS) administrada 24 meses despu\u00e9s no mostr\u00f3 diferencias significativas entre el grupo de DHA y el grupo placebo. Adem\u00e1s, no se observaron diferencias significativas entre ambos grupos en los cambios en el volumen del hipocampo, una regi\u00f3n fundamental para <a href=\"https:\/\/es.wired.com\/articulos\/el-estres-no-solo-afecta-la-memoria-tambien-limita-tu-capacidad-de-deduccion\">la memoria<\/a> y utilizada como indicador temprano del <a href=\"https:\/\/es.wired.com\/articulos\/el-alzheimer-presenta-signos-detectables-incluso-10-anos-antes-de-manifestarse\">Alzheimer.<\/a><\/p>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"21.425101214575\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"Cient\u00edfico que examina una resonancia magn\u00e9tica (RM) del cerebro de un paciente para detectar signos de envejecimiento y da\u00f1os causados por la demencia y la enfermedad de Alzheimer\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/69d3c5a2679e2861519ec401\/master\/w_120,c_limit\/2161269653 120w, https:\/\/media.es.wired.com\/photos\/69d3c5a2679e2861519ec401\/master\/w_240,c_limit\/2161269653 240w, https:\/\/media.es.wired.com\/photos\/69d3c5a2679e2861519ec401\/master\/w_320,c_limit\/2161269653 320w, https:\/\/media.es.wired.com\/photos\/69d3c5a2679e2861519ec401\/master\/w_640,c_limit\/2161269653 640w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/69d3c5a2679e2861519ec401\/master\/w_775%2Cc_limit\/2161269653\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"22.445344129555\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs fUtEc dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco gAoKdC hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/el-alzheimer-presenta-signos-detectables-incluso-10-anos-antes-de-manifestarse\" data-testid=\"ContentCardEmbedHedLink\">El Alzheimer presenta signos detectables incluso 10 a\u00f1os antes de manifestarse<\/a><\/div>\n<p>Un estudio reciente revela que los signos de Alzheimer aparecen como otros s\u00edntomas m\u00e1s de una d\u00e9cada antes de que a los pacientes se les diagnostique la enfermedad.<\/p>\n<\/div>\n<\/div>\n<h2>\u00bfPor qu\u00e9 no funcion\u00f3?<\/h2>\n<p>Los investigadores han propuesto varias razones por las que el DHA no mostr\u00f3 efectos cl\u00ednicos a pesar de llegar al cerebro. Una de ellas es una enzima que interrumpe el metabolismo del DHA en el cerebro. Cuando se activa la enzima fosfolipasa A2 dependiente de calcio (cPLA2), esta puede degradar el DHA antes de que pueda ser utilizado en la membrana sin\u00e1ptica, que es el sitio m\u00e1s importante para la funci\u00f3n cognitiva.<\/p>\n<p>Adem\u00e1s, <strong>el hecho de que muchos participantes presentaran factores de riesgo cardiovascular como <a href=\"https:\/\/es.wired.com\/articulos\/la-obesidad-en-mexico-crece-un-58-en-dos-decadas-como-abordar-esta-crisis-de-salud-publica\">obesidad<\/a>, hipertensi\u00f3n y sedentarismo podr\u00eda haber limitado la eficacia del DHA.<\/strong> Esto se debe a que se cree que la inflamaci\u00f3n provocada por estas afecciones contrarresta los efectos de las intervenciones con un solo nutriente. Asimismo, algunos consideran que la edad promedio de los participantes era relativamente joven (66 a\u00f1os) y que el deterioro de la funci\u00f3n cognitiva durante el estudio fue m\u00ednimo, lo que dificult\u00f3 la detecci\u00f3n de mejoras.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Se cree que el \u00e1cido docosahexaenoico (DHA),&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":303181,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[46],"tags":[],"class_list":["post-303180","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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