{"id":8222,"date":"2026-10-27T21:04:03","date_gmt":"2026-10-27T21:04:03","guid":{"rendered":"https:\/\/zawaya24.com\/ar\/concentre-tomate-memoire-attention-etude-2710\/"},"modified":"2026-10-27T21:04:07","modified_gmt":"2026-10-27T21:04:07","slug":"concentre-tomate-memoire-attention-etude-2710","status":"publish","type":"post","link":"https:\/\/zawaya24.com\/fr\/concentre-tomate-memoire-attention-etude-2710\/","title":{"rendered":"Concentr\u00e9 de tomate : un essai rel\u00e8ve de l\u00e9gers gains d&rsquo;attention et de m\u00e9moire"},"content":{"rendered":"<p>Prendre chaque jour du concentr\u00e9 de tomate pendant trois mois s&rsquo;accompagne de meilleurs r\u00e9sultats aux tests d&rsquo;attention s\u00e9lective et de m\u00e9moire associative chez des adultes d&rsquo;\u00e2ge moyen en bonne sant\u00e9. C&rsquo;est la conclusion d&rsquo;un essai clinique men\u00e9 par des chercheurs de l&rsquo;Universit\u00e9 de Barcelone, publi\u00e9 dans la revue scientifique Antioxidants.<\/p>\n<p>Les auteurs, parmi lesquels Ricardo L\u00f3pez-Sol\u00eds, Marina Corrado et Rosa M. Lamuela-Ravent\u00f3s, parlent de gains modestes. Dans un petit sous-groupe soumis \u00e0 l&rsquo;imagerie c\u00e9r\u00e9brale, ils ont aussi relev\u00e9 des changements dans la communication entre certains r\u00e9seaux du cerveau. Le taux d&rsquo;une prot\u00e9ine li\u00e9e \u00e0 la croissance des neurones a, lui, connu une hausse jug\u00e9e limite.<\/p>\n<h2>Isoler l&rsquo;effet de la tomate<\/h2>\n<p>La tomate constitue la principale source alimentaire de lycop\u00e8ne, un pigment de la famille des carot\u00e9no\u00efdes et un composant central du r\u00e9gime m\u00e9diterran\u00e9en. Ce compos\u00e9 franchit la barri\u00e8re h\u00e9mato-enc\u00e9phalique et pourrait att\u00e9nuer l&rsquo;inflammation et le stress oxydatif dans le cerveau.<\/p>\n<p>Les essais ant\u00e9rieurs associaient g\u00e9n\u00e9ralement des extraits de tomate ou du lycop\u00e8ne \u00e0 d&rsquo;autres vitamines, plantes ou baies, et portaient surtout sur des personnes \u00e2g\u00e9es. Impossible, donc, d&rsquo;attribuer les b\u00e9n\u00e9fices \u00e0 la seule tomate. L&rsquo;\u00e9quipe barcelonaise a voulu combler ce manque en ciblant des adultes de 40 \u00e0 55 ans, avant l&rsquo;apparition habituelle du d\u00e9clin cognitif li\u00e9 \u00e0 l&rsquo;\u00e2ge.<\/p>\n<h2>Deux tranches de trois mois<\/h2>\n<p>Quarante-sept adultes non fumeurs de la r\u00e9gion de Barcelone, sans maladie chronique ni trouble cognitif, ont \u00e9t\u00e9 recrut\u00e9s. Quarante-deux sont all\u00e9s au bout de l&rsquo;\u00e9tude. Leur \u00e2ge moyen avoisinait 47 ans, les deux tiers \u00e9taient des femmes et pr\u00e8s de 93 % avaient suivi des \u00e9tudes sup\u00e9rieures ou de troisi\u00e8me cycle.<\/p>\n<p>Chaque participant a suivi successivement les deux r\u00e9gimes, s\u00e9par\u00e9s par une pause d&rsquo;un mois. Pendant la phase active, il consommait quotidiennement, cru ou cuit, un concentr\u00e9 du commerce compos\u00e9 uniquement de tomates et de sel. La dose, fix\u00e9e \u00e0 0,5 gramme par kilo de poids corporel, repr\u00e9sentait en moyenne 35 grammes environ, soit \u00e0 peu pr\u00e8s deux cuill\u00e8res \u00e0 soupe, apportant 38,4 milligrammes de lycop\u00e8ne.<\/p>\n<p>La phase t\u00e9moin imposait \u00e0 l&rsquo;inverse un r\u00e9gime pauvre en lycop\u00e8ne, sans tomate, past\u00e8que, papaye, pamplemousse rose ni goyave, ni produits qui en contiennent. Un livret de recettes aidait les volontaires \u00e0 garder une alimentation comparable d&rsquo;une phase \u00e0 l&rsquo;autre, pendant que leur sommeil, leur activit\u00e9 physique et leur composition corporelle \u00e9taient suivis.<\/p>\n<h2>Trois tests cognitifs<\/h2>\n<p>Au d\u00e9but et \u00e0 la fin de chaque p\u00e9riode, les participants ont subi une prise de sang \u00e0 jeun ainsi que trois tests : un exercice de rep\u00e9rage de lettres sous contrainte de temps, un test de m\u00e9morisation de 12 paires visages-noms rappel\u00e9es au bout de 15 minutes, et un jeu de tri de cartes \u00e9valuant les fonctions ex\u00e9cutives. Quatorze d&rsquo;entre eux ont en outre pass\u00e9 une IRM fonctionnelle au repos.<\/p>\n<p>Les analyses sanguines montrent que le lycop\u00e8ne a r\u00e9agi comme pr\u00e9vu en moyenne, sans modification de l&rsquo;apport calorique, du sommeil ni de l&rsquo;exercice. Il est rest\u00e9 stable \u00e0 0,40 micromole par litre pendant la phase t\u00e9moin, alors qu&rsquo;il a plus que doubl\u00e9 durant la consommation de concentr\u00e9, \u00e0 partir d&rsquo;un niveau initial de 0,32 micromole par litre. Selon le seuil retenu par les chercheurs, 14 des 42 participants n&rsquo;ont toutefois pas pleinement respect\u00e9 le r\u00e9gime lors d&rsquo;au moins une des deux phases.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un essai de l&rsquo;Universit\u00e9 de Barcelone associe la prise quotidienne de concentr\u00e9 de tomate \u00e0 une meilleure attention et m\u00e9moire chez les 40-55 ans.<\/p>\n","protected":false},"author":5,"featured_media":8221,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[6038,6039,6040,6041],"class_list":["post-8222","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health","tag-university-barcelona","tag-rosa-lamuela-raventos","tag-ricardo-lopez-solis","tag-antioxidants-journal"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Un essai de l&#039;Universit\u00e9 de Barcelone associe la prise quotidienne de concentr\u00e9 de tomate \u00e0 une meilleure attention et m\u00e9moire chez les 40-55 ans.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Karim Dakir\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/zawaya24.com\/fr\/concentre-tomate-memoire-attention-etude-2710\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"fr_FR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Zawaya24 - L\u2019actualit\u00e9 sous tous les angles\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Concentr\u00e9 de tomate : gains modestes d&#039;attention et m\u00e9moire\" \/>\n\t\t<meta property=\"og:description\" content=\"Un essai de l&#039;Universit\u00e9 de Barcelone associe la prise quotidienne de concentr\u00e9 de tomate \u00e0 une meilleure attention et m\u00e9moire chez les 40-55 ans.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/zawaya24.com\/fr\/concentre-tomate-memoire-attention-etude-2710\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/zawaya24.com\/wp-content\/uploads\/2026\/10\/concentre-tomate-memoire-attention-etude-2710.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/zawaya24.com\/wp-content\/uploads\/2026\/10\/concentre-tomate-memoire-attention-etude-2710.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t\t<meta property=\"article:tag\" content=\"a:0:{}\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-10-27T21:04:03+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-10-27T21:04:07+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Concentr\u00e9 de tomate : gains modestes d&#039;attention et m\u00e9moire\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Un essai de l&#039;Universit\u00e9 de Barcelone associe la prise quotidienne de concentr\u00e9 de tomate \u00e0 une meilleure attention et m\u00e9moire chez les 40-55 ans.\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/zawaya24.com\/wp-content\/uploads\/2026\/10\/concentre-tomate-memoire-attention-etude-2710.jpg\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\\\/\\\/zawaya24.com\\\/fr\\\/concentre-tomate-memoire-attention-etude-2710\\\/#blogposting\",\"name\":\"Concentr\\u00e9 de tomate : gains modestes d'attention et m\\u00e9moire\",\"headline\":\"Concentr\\u00e9 de tomate : un essai rel\\u00e8ve de l\\u00e9gers gains d&rsquo;attention et de m\\u00e9moire\",\"author\":{\"@id\":\"https:\\\/\\\/zawaya24.com\\\/fr\\\/author\\\/karimdakir\\\/#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/zawaya24.com\\\/fr\\\/#organization\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/zawaya24.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/concentre-tomate-memoire-attention-etude-2710.jpg\",\"width\":1600,\"height\":900,\"caption\":\"[:ar]\\u0635\\u0648\\u0631\\u0629 \\u062a\\u0639\\u0628\\u064a\\u0631\\u064a\\u0629[:fr]Image d'illustration[:en]Illustrative image[:es]Imagen ilustrativa[:zh]\\u793a\\u610f\\u56fe[:]\"},\"datePublished\":\"2026-10-27T21:04:03+00:00\",\"dateModified\":\"2026-10-27T21:04:07+00:00\",\"inLanguage\":\"fr-FR\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/zawaya24.com\\\/fr\\\/concentre-tomate-memoire-attention-etude-2710\\\/#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/zawaya24.com\\\/fr\\\/concentre-tomate-memoire-attention-etude-2710\\\/#webpage\"},\"articleSection\":\"Sant\\u00e9, Universit\\u00e9 de Barcelone, Rosa M. 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