{"id":1250,"date":"2026-09-16T15:10:52","date_gmt":"2026-09-16T14:10:52","guid":{"rendered":"https:\/\/www.nutrixeal.fr\/expertise\/?p=1250"},"modified":"2026-09-18T14:12:34","modified_gmt":"2026-09-18T13:12:34","slug":"carence-omega-3-symptomes-solutions","status":"publish","type":"post","link":"https:\/\/www.nutrixeal.fr\/expertise\/carence-omega-3-symptomes-solutions\/","title":{"rendered":"Carence en Om\u00e9ga-3&nbsp;: sympt\u00f4mes, causes et solutions\u00a0"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Peu de Fran\u00e7ais atteignent les apports conseill\u00e9s en om\u00e9ga-3. Ces acides gras essentiels ne se fabriquent pas, ils viennent uniquement de l&rsquo;assiette, et notre alimentation en fournit trop peu. Voici comment rep\u00e9rer un d\u00e9ficit, en comprendre l&rsquo;origine et retrouver un apport correct.<\/p>\n\n\n\r\n<section class=\"article-callout article-callout--summary panel summary-box\">\r\n\r\n    <div class=\"article-callout__header\">\r\n      <span class=\"article-callout__icon\" aria-hidden=\"true\">\r\n                  <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\">\r\n            <path d=\"M3.5 10C3.5 6.22876 3.5 4.34315 4.7448 3.17157C5.98959 2 7.99306 2 12 2H12.7727C16.0339 2 17.6645 2 18.7969 2.79784C19.1214 3.02643 19.4094 3.29752 19.6523 3.60289C20.5 4.66867 20.5 6.20336 20.5 9.27273V11.8182C20.5 14.7814 20.5 16.2629 20.0311 17.4462C19.2772 19.3486 17.6829 20.8491 15.6616 21.5586C14.4044 22 12.8302 22 9.68182 22C7.88275 22 6.98322 22 6.26478 21.7478C5.10979 21.3424 4.19875 20.4849 3.76796 19.3979C3.5 18.7217 3.5 17.8751 3.5 16.1818V10Z\" stroke=\"#4FA729\" stroke-width=\"1.5\" stroke-linejoin=\"round\"\/>\r\n            <path d=\"M20.5 12C20.5 13.8409 19.0076 15.3333 17.1667 15.3333C16.5009 15.3333 15.716 15.2167 15.0686 15.3901C14.4935 15.5442 14.0442 15.9935 13.8901 16.5686C13.7167 17.216 13.8333 18.0009 13.8333 18.6667C13.8333 20.5076 12.3409 22 10.5 22\" stroke=\"#4FA729\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n            <path d=\"M8 7H15\" stroke=\"#4FA729\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n            <path d=\"M8 11H11\" stroke=\"#4FA729\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n          <\/svg>\r\n                <\/span>\r\n\r\n      <p class=\"article-callout__title\">\r\n        En r\u00e9sum\u00e9      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"article-callout__content\">\r\n      \n<ul class=\"wp-block-list\">\n<li><strong>Carence peu sp\u00e9cifique<\/strong>&nbsp;: Peau s\u00e8che, inconfort visuel, baisse de concentration ou moral fragile peuvent alerter, mais ne suffisent pas \u00e0 diagnostiquer un d\u00e9ficit.<\/li>\n\n\n\n<li><strong>Apports souvent insuffisants<\/strong>&nbsp;: Les om\u00e9ga-3 \u00e9tant essentiels, ils doivent venir de l\u2019alimentation, notamment poissons gras, noix et graines.<\/li>\n\n\n\n<li><strong>D\u00e9s\u00e9quilibre om\u00e9ga-6\/om\u00e9ga-3<\/strong>&nbsp;: L\u2019exc\u00e8s d\u2019huiles riches en om\u00e9ga-6 peut limiter la bonne utilisation des om\u00e9ga-3 par l\u2019organisme.<\/li>\n\n\n\n<li><strong>R\u00f4le cellulaire majeur<\/strong>&nbsp;: EPA et DHA s\u2019int\u00e8grent aux membranes, avec une importance particuli\u00e8re pour le cerveau, la r\u00e9tine et l\u2019\u00e9quilibre cardiovasculaire.<\/li>\n\n\n\n<li><strong>Diagnostic possible<\/strong>&nbsp;: L\u2019indice om\u00e9ga-3, mesur\u00e9 par prise de sang, refl\u00e8te les apports r\u00e9els des trois \u00e0 quatre derniers mois.<\/li>\n\n\n\n<li><strong>Solutions progressives<\/strong>&nbsp;: Poissons gras, huile de colza ou lin, noix et compl\u00e9ments riches en EPA-DHA peuvent corriger les apports.<\/li>\n<\/ul>\n    <\/div>\r\n\r\n<\/section>\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-f08122d9\"><h2 class=\"uagb-heading-text\">Qu&rsquo;est-ce que les Om\u00e9ga-3 et pourquoi sont-ils essentiels&nbsp;?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Les om\u00e9ga-3 forment une famille d&rsquo;acides gras polyinsatur\u00e9s que l&rsquo;organisme ne sait pas produire seul. C&rsquo;est ce qui les rend essentiels au sens strict&nbsp;: sans apport alimentaire r\u00e9gulier, le corps se retrouve \u00e0 court, sans solution de repli.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trois mol\u00e9cules comptent vraiment. L&rsquo;acide alpha-linol\u00e9nique (ALA) est le chef de file v\u00e9g\u00e9tal, pr\u00e9sent dans les huiles v\u00e9g\u00e9tales, les noix et les graines. Il sert de mati\u00e8re premi\u00e8re aux deux autres.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;acide eicosapenta\u00e9no\u00efque (EPA) et l&rsquo;acide docosahexa\u00e9no\u00efque (DHA) viennent principalement des produits de la mer. Le corps sait les fabriquer \u00e0 partir de cette mol\u00e9cule v\u00e9g\u00e9tale, mais avec un rendement si faible que cette voie ne suffit jamais \u00e0 elle seule.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ces mol\u00e9cules s&rsquo;int\u00e8grent aux membranes de nos cellules, o\u00f9 elles jouent un r\u00f4le structurel. Le cerveau et la r\u00e9tine en sont particuli\u00e8rement riches, ce qui explique l&rsquo;attention port\u00e9e \u00e0 ces deux organes.<\/p>\n\n\n\r\n<section class=\"article-callout article-callout--takeaway panel summary-box\">\r\n\r\n    <div class=\"article-callout__header\">\r\n      <span class=\"article-callout__icon\" aria-hidden=\"true\">\r\n                  <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n            <path d=\"M5.14286 14C4.41735 12.8082 4 11.4118 4 9.91886C4 5.54539 7.58172 2 12 2C16.4183 2 20 5.54539 20 9.91886C20 11.4118 19.5827 12.8082 18.8571 14\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\"\/>\r\n            <path d=\"M7.38287 17.0982C7.291 16.8216 7.24507 16.6833 7.25042 16.5713C7.26174 16.3343 7.41114 16.1262 7.63157 16.0405C7.73579 16 7.88105 16 8.17157 16H15.8284C16.119 16 16.2642 16 16.3684 16.0405C16.5889 16.1262 16.7383 16.3343 16.7496 16.5713C16.7549 16.6833 16.709 16.8216 16.6171 17.0982C16.4473 17.6094 16.3624 17.8651 16.2315 18.072C15.9572 18.5056 15.5272 18.8167 15.0306 18.9408C14.7935 19 14.525 19 13.9881 19H10.0119C9.47495 19 9.2065 19 8.96944 18.9408C8.47283 18.8167 8.04281 18.5056 7.7685 18.072C7.63755 17.8651 7.55266 17.6094 7.38287 17.0982Z\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M15 19L14.8707 19.6466C14.7293 20.3537 14.6586 20.7072 14.5001 20.9866C14.2552 21.4185 13.8582 21.7439 13.3866 21.8994C13.0816 22 12.7211 22 12 22C11.2789 22 10.9184 22 10.6134 21.8994C10.1418 21.7439 9.74484 21.4185 9.49987 20.9866C9.34144 20.7072 9.27073 20.3537 9.12932 19.6466L9 19\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M12 16V11\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n          <\/svg>\r\n                <\/span>\r\n\r\n      <p class=\"article-callout__title\">\r\n        Bon \u00e0 savoir      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"article-callout__content\">\r\n      \n<p class=\"wp-block-paragraph\">Le DHA repr\u00e9sente \u00e0 lui seul une part importante des lipides du cerveau. Cette concentration \u00e9lev\u00e9e justifie que les apports fassent l&rsquo;objet de recommandations sp\u00e9cifiques, distinctes de celles qui concernent l&rsquo;ensemble des mati\u00e8res grasses.<\/p>\n    <\/div>\r\n\r\n<\/section>\n\n\n<p class=\"wp-block-paragraph\">Cette place particuli\u00e8re explique aussi pourquoi le sujet revient si souvent en nutrition. Peu de nutriments occupent une place aussi structurelle dans l&rsquo;organisme tout en d\u00e9pendant enti\u00e8rement de l&rsquo;assiette.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-5e9f84ef\"><h2 class=\"uagb-heading-text\">Les signes et sympt\u00f4mes d&rsquo;une carence en Om\u00e9ga-3<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Aucun de ces sympt\u00f4mes n&rsquo;est sp\u00e9cifique. Pris isol\u00e9ment, chacun rel\u00e8ve de dizaines d&rsquo;autres explications, et seul un faisceau d&rsquo;indices associ\u00e9 \u00e0 une alimentation pauvre justifie d&rsquo;en parler \u00e0 un professionnel de sant\u00e9.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-531daf44\"><h3 class=\"uagb-heading-text\">Peau s\u00e8che et inconfort cutan\u00e9<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La peau s\u00e8che fait partie des observations les plus anciennes en nutrition. Un d\u00e9ficit prolong\u00e9 alt\u00e8re la barri\u00e8re cutan\u00e9e, dont les lipides assurent la coh\u00e9sion et limitent la perte en eau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette barri\u00e8re fonctionne comme un mortier entre les cellules de l&rsquo;\u00e9piderme. Quand les apports alimentaires en corps gras s&rsquo;effondrent durablement, sa composition se modifie et la peau devient rugueuse.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D&rsquo;autres nutriments interviennent directement sur ce terrain, avec des propri\u00e9t\u00e9s reconnues. Le zinc contribue au maintien d&rsquo;une peau normale, tout comme la vitamine A et la riboflavine, et il vise \u00e9galement les cheveux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Des probl\u00e8mes cutan\u00e9s qui s&rsquo;installent rel\u00e8vent quant \u00e0 eux d&rsquo;un dermatologue. L&rsquo;alimentation ne remplace jamais un avis sp\u00e9cialis\u00e9 sur ce terrain.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-3c569988\"><h3 class=\"uagb-heading-text\">Humeur instable et baisse de moral<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Le tissu c\u00e9r\u00e9bral compte parmi les plus riches en DHA de l&rsquo;organisme. Cette concentration explique l&rsquo;int\u00e9r\u00eat scientifique port\u00e9 au lien entre statut en om\u00e9ga-3 et sant\u00e9 du cerveau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sur le plan des propri\u00e9t\u00e9s reconnues, une formulation pr\u00e9cise existe&nbsp;: le DHA contribue au maintien d&rsquo;une fonction c\u00e9r\u00e9brale normale, \u00e0 raison de 250 mg quotidiens. Elle ne dit rien des troubles de l&rsquo;humeur, qui rel\u00e8vent d&rsquo;un tout autre registre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une pr\u00e9cision s&rsquo;impose ici. La d\u00e9pression est une maladie qui rel\u00e8ve d&rsquo;un diagnostic et d&rsquo;une prise en charge m\u00e9dicale. Aucun compl\u00e9ment ne s&rsquo;y substitue, et un moral bas qui dure doit conduire chez un m\u00e9decin.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-2eba947d\"><h3 class=\"uagb-heading-text\">S\u00e9cheresse oculaire et inconfort visuel<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;\u0153il en concentre beaucoup, en particulier dans la r\u00e9tine, o\u00f9 ces acides gras repr\u00e9sentent une part majeure des lipides pr\u00e9sents. Cette densit\u00e9 en fait l&rsquo;un des tissus les plus d\u00e9pendants de l&rsquo;apport alimentaire.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce que l&rsquo;on peut affirmer tient en une phrase&nbsp;: le DHA contribue au maintien d&rsquo;une vision normale, avec 250 mg quotidiens. Un inconfort visuel persistant justifie par ailleurs un examen ophtalmologique.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-23033444\"><h3 class=\"uagb-heading-text\">Difficult\u00e9s de concentration et troubles de la m\u00e9moire<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Le lien entre ce statut et l&rsquo;activit\u00e9 c\u00e9r\u00e9brale fait l&rsquo;objet de nombreux travaux. Sa densit\u00e9 dans le syst\u00e8me nerveux central rend la question l\u00e9gitime.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Des difficult\u00e9s de concentration ou des oublis fr\u00e9quents ne constituent cependant pas des signes caract\u00e9ristiques d\u2019un manque d\u2019om\u00e9ga-3. Le sommeil, le stress, l\u2019\u00e2ge, certains m\u00e9dicaments ou de nombreux autres facteurs peuvent \u00e9galement les expliquer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les 250 mg quotidiens correspondent \u00e0 peu pr\u00e8s \u00e0 deux portions de poisson gras par semaine. Atteindre ce niveau par l&rsquo;assiette reste possible pour qui en consomme r\u00e9guli\u00e8rement.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-1455012d\"><h2 class=\"uagb-heading-text\">Quelles sont les causes d&rsquo;une carence en Om\u00e9ga-3&nbsp;?<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-4b8686fd\"><h3 class=\"uagb-heading-text\">Alimentation moderne et d\u00e9s\u00e9quilibre Om\u00e9ga-6\/Om\u00e9ga-3<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Le probl\u00e8me n&rsquo;est pas seulement un manque d&rsquo;om\u00e9ga-3, c&rsquo;est aussi un exc\u00e8s d&rsquo;om\u00e9ga-6. Les deux familles empruntent les m\u00eames enzymes pour \u00eatre transform\u00e9es, et celle qui domine en quantit\u00e9 monopolise la machinerie.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nos habitudes alimentaires ont chang\u00e9 en quelques d\u00e9cennies. Les huiles de tournesol, de ma\u00efs et de p\u00e9pins de raisin apportent massivement de l&rsquo;om\u00e9ga-6, tout comme les produits transform\u00e9s, et le rapport entre les deux familles s&rsquo;est d\u00e9s\u00e9quilibr\u00e9. C&rsquo;est cet \u00e9quilibre qui compte, autant que le volume absolu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;Anses recommande un rapport entre acide linol\u00e9ique et ALA inf\u00e9rieur ou \u00e9gal \u00e0 5.<sup>[1]<\/sup>&nbsp;L&rsquo;assiette fran\u00e7aise moyenne en est loin, ce qui p\u00e9nalise la conversion vers les formes marines.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R\u00e9\u00e9quilibrer les apports passe d\u2019abord par le choix des mati\u00e8res grasses. Remplacer l\u2019huile de tournesol par une huile plus riche en om\u00e9ga-3, peut d\u00e9j\u00e0 contribuer \u00e0 am\u00e9liorer cet \u00e9quilibre.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-cce17eee\"><h3 class=\"uagb-heading-text\">Facteurs de risque&nbsp;: r\u00e9gimes sp\u00e9cifiques (v\u00e9g\u00e9tarien, vegan), \u00e2ge, certaines conditions m\u00e9dicales<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Les r\u00e9gimes excluant la mer exposent au premier chef. Un apport d&rsquo;origine v\u00e9g\u00e9tale reste possible gr\u00e2ce aux noix et aux graines, mais la conversion vers les formes marines plafonne tr\u00e8s bas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les microalgues constituent la solution pour ces profils. Elles fournissent directement du DHA, sans passer par la case poisson.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;\u00e2ge intervient \u00e9galement&nbsp;: la capacit\u00e9 de conversion diminue avec les ann\u00e9es, ce qui rend l&rsquo;apport direct plus important chez les seniors. Les femmes enceintes et allaitantes doivent, elles aussi, augmenter leur apport.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Certaines situations m\u00e9dicales, notamment les troubles de l&rsquo;absorption des lipides, r\u00e9duisent l&rsquo;assimilation de ces nutriments. Elles justifient un suivi aupr\u00e8s d&rsquo;un professionnel de sant\u00e9.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-da60effe\"><h2 class=\"uagb-heading-text\">Comment diagnostiquer une carence en Om\u00e9ga-3 <\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-888f4b1c\"><h3 class=\"uagb-heading-text\">Reconna\u00eetre les sympt\u00f4mes&nbsp;: auto-\u00e9valuation<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Commencez par regarder votre assiette plut\u00f4t que vos sympt\u00f4mes. Trois questions suffisent&nbsp;: mangez-vous du poisson deux fois par semaine, quelle huile utilisez-vous pour assaisonner, et consommez-vous des noix ou des graines r\u00e9guli\u00e8rement&nbsp;?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si les trois r\u00e9ponses sont n\u00e9gatives, le d\u00e9ficit est probable, quoi que vous ressentiez par ailleurs. Si elles sont positives, cherchez ailleurs l&rsquo;origine de vos sympt\u00f4mes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette auto-\u00e9valuation ne remplace \u00e9videmment pas un avis m\u00e9dical. Une fatigue install\u00e9e ou des signes qui durent m\u00e9ritent un bilan complet, o\u00f9 le statut en acides gras ne sera qu&rsquo;un \u00e9l\u00e9ment parmi d&rsquo;autres.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-4aef3dfd\"><h3 class=\"uagb-heading-text\">Le test de carence en Om\u00e9ga-3&nbsp;: la prise de sang et l&rsquo;indice Om\u00e9ga-3<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Il existe un examen d\u00e9di\u00e9. L&rsquo;indice om\u00e9ga-3 mesure la part d&rsquo;EPA et de DHA dans les membranes des globules rouges, exprim\u00e9e en pourcentage du total.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce marqueur refl\u00e8te le statut des trois \u00e0 quatre derniers mois, contrairement \u00e0 un dosage plasmatique qui varie avec le dernier repas. Un taux \u00e9lev\u00e9 traduit un apport r\u00e9gulier et durable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cet examen n&rsquo;est pas rembours\u00e9 et reste peu prescrit en pratique courante. Il se justifie surtout en cas de doute persistant ou de r\u00e9gime tr\u00e8s particulier, et son interpr\u00e9tation revient \u00e0 votre m\u00e9decin.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-04e455fb\"><h2 class=\"uagb-heading-text\">Que sait-on d&rsquo;un apport insuffisant en Om\u00e9ga-3&nbsp;?<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-421edcdf\"><h3 class=\"uagb-heading-text\">C\u0153ur et pression sanguine<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est le domaine le mieux document\u00e9, avec plusieurs formulations reconnues. L&rsquo;EPA et le DHA contribuent \u00e0 une fonction cardiaque normale, \u00e0 raison de 250 mg par jour au total.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 des apports plus \u00e9lev\u00e9s, d&rsquo;autres propri\u00e9t\u00e9s sont \u00e9tablies. Ces deux mol\u00e9cules contribuent au maintien d&rsquo;une pression sanguine normale, avec un apport quotidien de 3 g.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Concernant les lipides sanguins&nbsp;: l&rsquo;EPA et le DHA contribuent au maintien d&rsquo;une concentration normale de triglyc\u00e9rides sanguins, \u00e0 partir de 2 g quotidiens.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Du c\u00f4t\u00e9 v\u00e9g\u00e9tal, l&rsquo;apport n&rsquo;est pas en reste. L&rsquo;acide alpha-linol\u00e9nique contribue au maintien d&rsquo;une cholest\u00e9rol\u00e9mie normale, avec un apport quotidien de 2 g.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un apport insuffisant en om\u00e9ga-3 peut ainsi avoir un impact n\u00e9gatif sur la sant\u00e9 cardiovasculaire.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un mot sur ce que vous lirez ailleurs. Les maladies cardiovasculaires restent la premi\u00e8re cause de mortalit\u00e9 dans le monde, et les acides gras om\u00e9ga-3 reviennent constamment dans le d\u00e9bat sur la sant\u00e9 cardiovasculaire. Toutefois, aucune r\u00e9duction du risque de maladies cardiovasculaires n&rsquo;est reconnue \u00e0 ces nutriments \u00e0 ce jour.&nbsp;<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-dfec9c50\"><h3 class=\"uagb-heading-text\">D\u00e9veloppement neurologique et cerveau<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La p\u00e9riode p\u00e9rinatale fait l&rsquo;objet d&rsquo;une attention particuli\u00e8re. La consommation de DHA par la m\u00e8re contribue au d\u00e9veloppement normal du cerveau du f\u0153tus et de l&rsquo;enfant allait\u00e9, avec 200 mg quotidiens en plus des apports conseill\u00e9s pour l&rsquo;adulte.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les om\u00e9ga-3 jouent \u00e9galement un r\u00f4le important pour les yeux&nbsp;: la consommation de DHA par la m\u00e8re contribue au d\u00e9veloppement normal des yeux du f\u0153tus et de l&rsquo;enfant allait\u00e9, dans les m\u00eames conditions d&rsquo;apport.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Chez l&rsquo;adulte, on en revient \u00e0 la propri\u00e9t\u00e9 d\u00e9j\u00e0 cit\u00e9e plus haut. Une insuffisance d\u2019apport ne provoque toutefois pas de sympt\u00f4mes neurologiques sp\u00e9cifiques permettant, \u00e0 eux seuls, d\u2019identifier une carence.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-262ff72f\"><h3 class=\"uagb-heading-text\">Ce qui se joue au niveau des membranes cellulaires<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Comprendre le m\u00e9canisme aide \u00e0 saisir pourquoi le rapport avec les om\u00e9ga-6 compte autant. Les deux familles s&rsquo;int\u00e8grent aux m\u00eames membranes et servent de mati\u00e8re premi\u00e8re aux m\u00eames enzymes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce partage cr\u00e9e une comp\u00e9tition permanente. La famille la plus repr\u00e9sent\u00e9e dans l&rsquo;assiette occupe la place, et sa domination s&rsquo;installe de fa\u00e7on chronique quand les habitudes ne changent pas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 partir de ces mol\u00e9cules, le corps fabrique des messagers chimiques appel\u00e9s eicosano\u00efdes. Ceux issus des om\u00e9ga-6 et ceux issus de l&rsquo;EPA n&rsquo;ont pas le m\u00eame profil, et leur proportion d\u00e9pend directement de ce que vous mangez.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ces messagers interviennent notamment dans les processus inflammatoires, d\u00e9crits pr\u00e9cis\u00e9ment par la biochimie depuis des d\u00e9cennies.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une membrane riche en om\u00e9ga-3 produit des m\u00e9diateurs diff\u00e9rents d&rsquo;une membrane satur\u00e9e d&rsquo;om\u00e9ga-6. C&rsquo;est ce m\u00e9canisme qui explique l&rsquo;int\u00e9r\u00eat scientifique port\u00e9 au sujet depuis quarante ans.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ce renouvellement prend du temps et de l&rsquo;\u00e9nergie. Il faut trois \u00e0 quatre mois pour qu&rsquo;un changement alimentaire modifie r\u00e9ellement la composition des cellules, ce qui explique la lenteur de tout ajustement.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-fd8bdb1c\"><h2 class=\"uagb-heading-text\">Sources alimentaires riches en Om\u00e9ga-3&nbsp;: o\u00f9 les trouver&nbsp;?<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Les poissons gras arrivent en t\u00eate. Saumon, maquereau, sardine, hareng et anchois en fournissent beaucoup, et ce sont les seuls aliments qui apportent directement l&rsquo;EPA et le DHA.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Deux portions par semaine, dont une de poissons gras, constituent le rep\u00e8re habituel. Les petits poissons ont l&rsquo;avantage d&rsquo;accumuler moins de contaminants que les gros pr\u00e9dateurs, un argument de qualit\u00e9 \u00e0 ne pas n\u00e9gliger.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Place ensuite aux v\u00e9g\u00e9taux. L&rsquo;huile la plus concentr\u00e9e reste celle de lin, suivie de la noix et du colza. Les cerneaux et les ol\u00e9agineux compl\u00e8tent utilement les apports.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-37ee5ada\"><h3 class=\"uagb-heading-text\">Les teneurs \u00e0 conna\u00eetre par portion<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Les \u00e9carts entre aliments sont consid\u00e9rables. Une portion de 100 g de maquereau apporte environ 2,5 g de ces deux mol\u00e9cules r\u00e9unies, soit cinq fois la r\u00e9f\u00e9rence quotidienne.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La sardine et le hareng se situent autour de 2 g pour la m\u00eame portion. Une seule assiette hebdomadaire couvre d\u00e9j\u00e0 une bonne part des besoins.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Attention en revanche au thon en conserve au naturel, souvent cit\u00e9 \u00e0 tort. Sa teneur tombe sous 0,5 g pour 100 g, tr\u00e8s loin des esp\u00e8ces cit\u00e9es plus haut.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4t\u00e9 v\u00e9g\u00e9tal, une cuill\u00e8re \u00e0 soupe d&rsquo;huile de lin apporte environ 7 g d&rsquo;ALA, contre 1 g pour la m\u00eame dose de colza. Rappelons que cette mol\u00e9cule ne se convertit qu&rsquo;\u00e0 quelques pour cent en formes marines.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-287c3dcb\"><h3 class=\"uagb-heading-text\">Bien conserver et bien utiliser ses huiles<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La chaleur d\u00e9truit ces acides gras, ce qui r\u00e9serve les huiles riches en om\u00e9ga-3 aux assaisonnements plut\u00f4t qu&rsquo;\u00e0 la cuisson. Elles se servent \u00e0 froid, sur des crudit\u00e9s ou un plat d\u00e9j\u00e0 dress\u00e9.<\/p>\n\n\n\r\n<section class=\"article-callout article-callout--takeaway panel summary-box\">\r\n\r\n    <div class=\"article-callout__header\">\r\n      <span class=\"article-callout__icon\" aria-hidden=\"true\">\r\n                  <svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\r\n            <path d=\"M5.14286 14C4.41735 12.8082 4 11.4118 4 9.91886C4 5.54539 7.58172 2 12 2C16.4183 2 20 5.54539 20 9.91886C20 11.4118 19.5827 12.8082 18.8571 14\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\"\/>\r\n            <path d=\"M7.38287 17.0982C7.291 16.8216 7.24507 16.6833 7.25042 16.5713C7.26174 16.3343 7.41114 16.1262 7.63157 16.0405C7.73579 16 7.88105 16 8.17157 16H15.8284C16.119 16 16.2642 16 16.3684 16.0405C16.5889 16.1262 16.7383 16.3343 16.7496 16.5713C16.7549 16.6833 16.709 16.8216 16.6171 17.0982C16.4473 17.6094 16.3624 17.8651 16.2315 18.072C15.9572 18.5056 15.5272 18.8167 15.0306 18.9408C14.7935 19 14.525 19 13.9881 19H10.0119C9.47495 19 9.2065 19 8.96944 18.9408C8.47283 18.8167 8.04281 18.5056 7.7685 18.072C7.63755 17.8651 7.55266 17.6094 7.38287 17.0982Z\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M15 19L14.8707 19.6466C14.7293 20.3537 14.6586 20.7072 14.5001 20.9866C14.2552 21.4185 13.8582 21.7439 13.3866 21.8994C13.0816 22 12.7211 22 12 22C11.2789 22 10.9184 22 10.6134 21.8994C10.1418 21.7439 9.74484 21.4185 9.49987 20.9866C9.34144 20.7072 9.27073 20.3537 9.12932 19.6466L9 19\" stroke=\"#98800B\" stroke-width=\"1.5\"\/>\r\n            <path d=\"M12 16V11\" stroke=\"#98800B\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\r\n          <\/svg>\r\n                <\/span>\r\n\r\n      <p class=\"article-callout__title\">\r\n        Bon \u00e0 savoir      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"article-callout__content\">\r\n      \n<p class=\"wp-block-paragraph\">L&rsquo;huile de lin s&rsquo;oxyde tr\u00e8s vite. Achetez-la en petit conditionnement, conservez-la au r\u00e9frig\u00e9rateur et ne la chauffez jamais. Une huile rance perd tout int\u00e9r\u00eat nutritionnel et prend un go\u00fbt caract\u00e9ristique qui ne trompe pas.<\/p>\n    <\/div>\r\n\r\n<\/section>\n\n\n<p class=\"wp-block-paragraph\">Les \u0153ufs de poules nourries aux graines de lin et les microalgues ont \u00e9galement partie de\u00a0la liste des aliments riches en om\u00e9ga-3. Ces derni\u00e8res int\u00e9ressent particuli\u00e8rement les personnes qui ne consomment aucun produit de la mer.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-482905c7\"><h2 class=\"uagb-heading-text\">Comment combler une carence en Om\u00e9ga-3&nbsp;? Les solutions efficaces<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-73b2af40\"><h3 class=\"uagb-heading-text\">L&rsquo;alimentation&nbsp;: la base indispensable pour un apport suffisant<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Trois changements simples peuvent d\u00e9j\u00e0 am\u00e9liorer sensiblement les apports. Changer d&rsquo;huile pour l&rsquo;assaisonnement, ajouter deux portions de poisson par semaine, glisser une poign\u00e9e de noix dans la journ\u00e9e.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ces gestes co\u00fbtent peu et agissent sur les deux tableaux&nbsp;: ils permettent d&rsquo;augmenter les apports et r\u00e9duisent m\u00e9caniquement la part des om\u00e9ga-6.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une alimentation riche et vari\u00e9e reste le socle de tout le reste. La suppl\u00e9mentation vient en compl\u00e9ment d&rsquo;une assiette correcte, jamais en remplacement d&rsquo;une assiette d\u00e9s\u00e9quilibr\u00e9e.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-613661a2\"><h3 class=\"uagb-heading-text\">La suppl\u00e9mentation&nbsp;: quand et comment choisir les bons compl\u00e9ments (EPA, DHA)<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La suppl\u00e9mentation se justifie dans trois situations&nbsp;: une alimentation sans produits de la mer, un apport major\u00e9, ou un d\u00e9ficit qui persiste malgr\u00e9 les ajustements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le premier crit\u00e8re de choix est la teneur r\u00e9elle en actifs, pas le poids total de la capsule. Un gramme d&rsquo;huile peut n&rsquo;apporter que 300 mg d&rsquo;EPA et de DHA r\u00e9unis.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le deuxi\u00e8me crit\u00e8re tient \u00e0 la qualit\u00e9 de la mati\u00e8re premi\u00e8re. Une huile purifi\u00e9e et contr\u00f4l\u00e9e, issue de petites esp\u00e8ces, offre les meilleures garanties. Les&nbsp;<a href=\"https:\/\/www.nutrixeal.fr\/205-omega-3-epax-xo\">om\u00e9ga-3 EPAX<\/a>&nbsp;illustrent cette approche, avec des contr\u00f4les de puret\u00e9 document\u00e9s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Regardez enfin l&rsquo;indice de peroxydation, qui t\u00e9moigne de la fra\u00eecheur, et la pr\u00e9sence d&rsquo;un antioxydant dans la formule. Les&nbsp;<a href=\"https:\/\/www.nutrixeal.fr\/42-Les-acides-gras-omega-3\">compl\u00e9ments alimentaires d&rsquo;om\u00e9ga-3<\/a>&nbsp;s\u00e9rieux affichent ces informations sans qu&rsquo;il faille les chercher.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-4d68bc8b\"><h3 class=\"uagb-heading-text\">Dur\u00e9e de la suppl\u00e9mentation et temps pour ressentir les effets<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Les membranes cellulaires se renouvellent lentement. Il faut compter trois \u00e0 quatre mois pour que votre statut \u00e9volue r\u00e9ellement, ce que confirme la cin\u00e9tique de l&rsquo;indice om\u00e9ga-3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N&rsquo;attendez donc rien de spectaculaire en quelques semaines. Une suppl\u00e9mentation s&rsquo;inscrit dans la dur\u00e9e et vise \u00e0 maintenir un statut correct, pas \u00e0 produire un effet imm\u00e9diat sur le bien-\u00eatre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prendre les capsules au cours d&rsquo;un repas contenant des lipides am\u00e9liore leur assimilation. Il est \u00e9galement \u00e0 noter que la r\u00e9gularit\u00e9 prime sur l&rsquo;intensit\u00e9.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-1b28c022\"><h2 class=\"uagb-heading-text\">Les besoins quotidiens en Om\u00e9ga-3&nbsp;: recommandations et apports conseill\u00e9s<\/h2><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;Anses fixe les rep\u00e8res pour l&rsquo;adulte&nbsp;: 1 % de l&rsquo;apport \u00e9nerg\u00e9tique total pour l&rsquo;ALA, 250 mg quotidiens pour l&rsquo;EPA et autant pour le DHA.<sup>[1]<\/sup>&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les femmes enceintes et allaitantes doivent ajouter 250 mg \u00e0 l&rsquo;apport de l&rsquo;adulte.<sup>[2]<\/sup>&nbsp;Cette majoration couvre les exigences de la grossesse et de l&rsquo;allaitement.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour aller plus loin dans le d\u00e9tail des dosages selon les profils, la&nbsp;<a href=\"https:\/\/www.nutrixeal.fr\/expertise\/omega-3-combien-par-jour\/\">quantit\u00e9 d&rsquo;om\u00e9ga-3 par jour<\/a> m\u00e9rite d&rsquo;\u00eatre ajust\u00e9e \u00e0 votre situation. Un professionnel de sant\u00e9 reste le mieux plac\u00e9 pour vous orienter.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-c533866d\"><h2 class=\"uagb-heading-text\">Sources<\/h2><\/div>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Anses. Les lipides&nbsp;: acides indispensables et r\u00e9f\u00e9rences nutritionnelles. Avis et rapport d&rsquo;expertise collective.<\/li>\n\n\n\n<li>Anses. Actualisation des apports nutritionnels conseill\u00e9s pour les mati\u00e8res grasses. Rapport d&rsquo;expertise collective, 2011.<\/li>\n<\/ol>\n\n\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Peu de Fran\u00e7ais atteignent les apports conseill\u00e9s en om\u00e9ga-3. Ces acides gras essentiels ne se fabriquent pas, ils viennent uniquement de l&rsquo;assiette, et notre alimentation en fournit trop peu. Voici comment rep\u00e9rer un d\u00e9ficit, en comprendre l&rsquo;origine et retrouver un apport correct. Qu&rsquo;est-ce que les Om\u00e9ga-3 et pourquoi sont-ils essentiels&nbsp;? Les om\u00e9ga-3 forment une famille [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1252,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","nutrixeal_featured":false,"nutrixeal_most_read":false,"footnotes":""},"categories":[38,25],"tags":[],"class_list":["post-1250","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles-omega-3","category-sante-oculaire-articles-et-conseils-nutritionnels"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Carence om\u00e9ga 3 : quels sont les signes et comment y rem\u00e9dier ?<\/title>\n<meta name=\"description\" content=\"Carence om\u00e9ga 3 : sympt\u00f4mes, causes et solutions. 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scientifique Nutrixeal","author_link":"https:\/\/www.nutrixeal.fr\/expertise\/author\/equipe-scientifique\/"},"uagb_comment_info":0,"uagb_excerpt":"Peu de Fran\u00e7ais atteignent les apports conseill\u00e9s en om\u00e9ga-3. Ces acides gras essentiels ne se fabriquent pas, ils viennent uniquement de l&rsquo;assiette, et notre alimentation en fournit trop peu. Voici comment rep\u00e9rer un d\u00e9ficit, en comprendre l&rsquo;origine et retrouver un apport correct. Qu&rsquo;est-ce que les Om\u00e9ga-3 et pourquoi sont-ils essentiels&nbsp;? 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