{"id":21762,"date":"2026-07-03T05:01:14","date_gmt":"2026-07-03T08:01:14","guid":{"rendered":"https:\/\/impactocastex.com.ar\/?p=21762"},"modified":"2026-07-03T05:01:14","modified_gmt":"2026-07-03T08:01:14","slug":"dieta-para-la-longevidad-afirman-que-la-clave-esta-en-elegir-mejor-la-fuente-de-proteinas","status":"publish","type":"post","link":"https:\/\/impactocastex.com.ar\/?p=21762","title":{"rendered":"Dieta para la longevidad: afirman que la clave est\u00e1 en elegir mejor la fuente de prote\u00ednas"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/www.clarin.com\/img\/2025\/01\/30\/y6fp0JTeV_2000x1500__1.jpg\" class=\"ff-og-image-inserted\" \/><\/div>\n<div>\n<p>La alimentaci\u00f3n vuelve a situarse en el centro del debate sobre el envejecimiento saludable. Un <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/42335894\/\" target=\"_blank\" title=\"nuevo estudio\" class=\"tac-player-processed\">nuevo estudio<\/a> liderado por investigadores de la Universidad del Sur de California (USC) apunta a que la clave para vivir m\u00e1s a\u00f1os con buena salud podr\u00eda no estar tanto en comer menos, sino en <strong>elegir mejor el origen de las prote\u00ednas<\/strong>.<\/p>\n<\/div>\n<div>\n<p>Los resultados sugieren que una dieta <strong>mayoritariamente basada en vegetales, complementada con pescado<\/strong> y con una ingesta moderada de determinados amino\u00e1cidos presentes en alimentos de origen animal, podr\u00eda favorecer una mayor longevidad y reducir el riesgo de enfermedades metab\u00f3licas.<\/p>\n<\/div>\n<div>\n<p>La investigaci\u00f3n, publicada en la revista cient\u00edfica <em>Cell Metabolism <\/em>y recogida por Europa Press, compar\u00f3 distintos patrones de alimentaci\u00f3n en ratones de edad avanzada. Los cient\u00edficos analizaron los efectos de una <strong>dieta occidental rica en grasas y az\u00facares, una dieta cetog\u00e9nica, una alimentaci\u00f3n inspirada en la dieta mediterr\u00e1nea y la tradicional de Okinawa<\/strong> suplementada con metionina, adem\u00e1s de ciclos de una dieta que imita el ayuno.<\/p>\n<\/div>\n<div>\n<p>El equipo, liderado por el geront\u00f3logo Valter Longo, de la Escuela de Gerontolog\u00eda Leonard Davis de la USC, comprob\u00f3 que la denominada<strong> dieta de longevidad<\/strong> \u2014baja en prote\u00ednas, basada principalmente en alimentos vegetales y pescado, y con una cantidad reducida pero suficiente del amino\u00e1cido esencial metionina\u2014 fue la que obtuvo mejores resultados.<\/p>\n<\/div>\n<div>\n<p>Los ratones alimentados con este patr\u00f3n presentaron una mayor esperanza de vida saludable, <strong>menor acumulaci\u00f3n de grasa corporal y menos signos de fragilidad<\/strong>, manteniendo al mismo tiempo su masa muscular. Uno de los hallazgos que m\u00e1s sorprendi\u00f3 a los investigadores fue que estos animales pod\u00edan ingerir tantas calor\u00edas como el resto de grupos y, aun as\u00ed, perder grasa sin comprometer el m\u00fasculo.<\/p>\n<\/div>\n<div>\n<p>La primera autora del estudio, Maura Fanti, explica que lo m\u00e1s llamativo fue comprobar que modificar \u00fanicamente la cantidad de un amino\u00e1cido como la metionina provocaba cambios metab\u00f3licos muy importantes. Seg\u00fan la investigadora, este resultado sugiere que la composici\u00f3n de los amino\u00e1cidos podr\u00eda ser incluso m\u00e1s determinante que la cantidad total de prote\u00ednas consumidas.<\/p>\n<\/div>\n<div>\n<p>Adem\u00e1s, el estudio detect\u00f3 mejoras en distintos biomarcadores relacionados con la salud cardiometab\u00f3lica, entre ellos mayores niveles de GLP-1, una mol\u00e9cula implicada en la regulaci\u00f3n del metabolismo y del envejecimiento.<\/p>\n<\/div>\n<div>\n<p>Para reforzar sus conclusiones, los investigadores analizaron tambi\u00e9n datos diet\u00e9ticos y de salud de m\u00e1s de 200.000 personas en colaboraci\u00f3n con la Universidad de Toronto y la Universidad de Harvard. Los resultados mostraron que quienes consum\u00edan <strong>mayores cantidades de prote\u00edna animal<\/strong> presentaban una mayor prevalencia de obesidad y hasta el doble de riesgo de desarrollar diabetes tipo 2 respecto a quienes segu\u00edan una alimentaci\u00f3n con poca o ninguna prote\u00edna animal, incluso cuando estos \u00faltimos inger\u00edan m\u00e1s calor\u00edas.<\/p>\n<\/div>\n<div>\n<p>Seg\u00fan Longo, estos datos respaldan la idea de una \u201cdieta para la longevidad\u201d principalmente vegetariana o vegana, <strong>enriquecida con pescado<\/strong> para aportar los amino\u00e1cidos esenciales necesarios sin exceder la cantidad de metionina.<\/p>\n<\/div>\n<div>\n<p>Estas conclusiones encajan con lo observado desde hace a\u00f1os en las conocidas como <a href=\"https:\/\/www.clarin.com\/buena-vida\/zonas-azules-viaje-mundo-longevidad-7-secretos-supercentenarios_0_lHONQT5103.html\" target=\"_blank\" title=\"\u201czonas azules\u201d\" class=\"tac-player-processed\">\u201czonas azules\u201d<\/a>, regiones del mundo donde se concentra un n\u00famero excepcionalmente elevado de personas centenarias, como Cerde\u00f1a, Okinawa, Icaria, Nicoya o Loma Linda. Investigadores como Dan Buettner, que populariz\u00f3 este concepto, han identificado numerosos factores asociados a la longevidad, aunque uno de los m\u00e1s repetidos es precisamente una <strong>alimentaci\u00f3n predominantemente vegetal<\/strong>.<\/p>\n<\/div>\n<div>\n<p>En estas poblaciones abundan las<strong> legumbres, verduras, frutas, cereales integrales, frutos secos y aceite de oliva<\/strong>, mientras que la carne se consume de forma ocasional y el pescado tiene mayor protagonismo. A ello se suman otros h\u00e1bitos saludables como la actividad f\u00edsica diaria, una vida social activa, el manejo del estr\u00e9s y un fuerte sentido de prop\u00f3sito vital.<\/p>\n<\/div>\n<div>\n<p>La dietista Paula Marrero, especializada en alimentaci\u00f3n vegetal, recuerda que la aut\u00e9ntica dieta mediterr\u00e1nea tradicional<strong> era mucho m\u00e1s vegetal <\/strong>de lo que suele interpretarse hoy en d\u00eda. <\/p>\n<\/div>\n<div>\n<p>En su opini\u00f3n, recuperar platos sencillos como guisos de legumbres, verduras de temporada o frutas como postre habitual supone volver a un patr\u00f3n alimentario respaldado por la evidencia cient\u00edfica tanto para la salud como para la sostenibilidad.<\/p>\n<\/div>\n<div>\n<p>\u27aa\u00bfTen\u00e9s alguna duda sobre salud y bienestar que te gustar\u00eda que abordemos en notas de la secci\u00f3n? Escribinos tu consulta a <strong>buenavida@clarin.com<\/strong><\/p>\n<\/div>\n<p><strong><a href=\"https:\/\/blockads.fivefilters.org\/\">Adblock test<\/a><\/strong> <a href=\"https:\/\/blockads.fivefilters.org\/acceptable.html\">(Why?)<\/a><\/p>\n<p>\u200b\u00a0\u00a0<\/p>","protected":false},"excerpt":{"rendered":"<p>La alimentaci\u00f3n vuelve a situarse en el centro del debate sobre el envejecimiento saludable. Un&#8230;<\/p>\n","protected":false},"author":1,"featured_media":21763,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_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}},"categories":[120],"tags":[],"class_list":["post-21762","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-salud"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dieta para la longevidad: afirman que la clave est\u00e1 en elegir mejor la fuente de prote\u00ednas -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/impactocastex.com.ar\/?p=21762\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dieta para la longevidad: afirman que la clave est\u00e1 en elegir mejor la fuente de prote\u00ednas -\" \/>\n<meta property=\"og:description\" content=\"La alimentaci\u00f3n vuelve a situarse en el centro del debate sobre el envejecimiento saludable. 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