{"id":16857,"date":"2026-05-26T21:11:08","date_gmt":"2026-05-26T19:11:08","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/selon-des-chercheurs-la-vitamine-c-reduit-le-risque-de-cancer\/"},"modified":"2026-05-26T21:11:09","modified_gmt":"2026-05-26T19:11:09","slug":"selon-des-chercheurs-la-vitamine-c-reduit-le-risque-de-cancer","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/selon-des-chercheurs-la-vitamine-c-reduit-le-risque-de-cancer\/","title":{"rendered":"Selon des chercheurs, la vitamine C r\u00e9duit le risque de cancer"},"content":{"rendered":"<p><!--$--><\/p>\n<div data-hk=\"0000a104212000a22200\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<p>La vitamine C soutient le syst\u00e8me immunitaire, la production de collag\u00e8ne et prot\u00e8ge les cellules. Comme l\u2019a r\u00e9v\u00e9l\u00e9 une \u00e9tude de l\u2019Universit\u00e9 canadienne de Waterloo publi\u00e9e dans le Journal of Theoretical Biology, cela pourrait \u00e9galement r\u00e9duire le risque de cancer. <\/p>\n<\/div>\n<div data-hk=\"0000a104212000a22210\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<p>Ainsi, les aliments riches en vitamine C et les compl\u00e9ments alimentaires en vitamine C peuvent prot\u00e9ger contre les substances canc\u00e9rig\u00e8nes apr\u00e8s avoir mang\u00e9.<\/p>\n<\/div>\n<aside data-hk=\"0000a104212000a222204\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-mobile Ad-Slot-hor Ad-Slot-FC\">\n<div class=\"Ad-Slot-FC-Container\">\n<div class=\"Ad-Slot-FC-Window\">\n<div id=\"ad-slot-mobile-hor-2\" data-orientation=\"hor\" data-index=\"2\" data-slot=\"ad-slot\" data-device=\"mobile\"><\/div>\n<\/div>\n<\/div>\n<\/aside>\n<div data-hk=\"0000a104212000a22230\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<h2>La vitamine C pourrait r\u00e9duire le risque de cancer, selon des chercheurs<\/h2>\n<p>Cela est d\u00fb aux compos\u00e9s chimiques nitrate et nitrite, naturellement pr\u00e9sents dans les fruits et l\u00e9gumes. Ils peuvent \u00e9galement \u00eatre utilis\u00e9s comme additifs alimentaires sous forme de sel de sodium et de potassium. <\/p>\n<\/div>\n<div data-hk=\"0000a104212000a22240\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<ul>\n<li><strong>nitrate<\/strong> est inoffensif en soi et se retrouve notamment dans les l\u00e9gumes-feuilles et racines comme les \u00e9pinards, la laitue et la roquette, ainsi que dans l&rsquo;eau potable et les viandes en conserve. Cependant, le nitrate peut \u00e9galement p\u00e9n\u00e9trer dans les aliments en tant que polluant via la pollution de l&rsquo;environnement.<\/li>\n<li><strong>nitrite<\/strong> En revanche, on le trouve principalement dans les viandes transform\u00e9es et en conserve comme le jambon ou le salami.<\/li>\n<\/ul>\n<p>Le corps absorbe rapidement les deux substances et les excr\u00e8te sous forme de nitrate. Cependant, une partie du nitrate absorb\u00e9 est \u00e9galement transform\u00e9e en nitrite par certaines bact\u00e9ries pr\u00e9sentes dans la salive. <\/p>\n<\/div>\n<aside data-hk=\"0000a104212000a222504\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-mobile Ad-Slot-out\">\n<div id=\"ad-slot-mobile-out-1\" data-orientation=\"out\" data-index=\"1\" data-slot=\"ad-slot\" data-device=\"mobile\"><\/div>\n<\/aside>\n<div data-hk=\"0000a104212000a22260\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<h2>C&rsquo;est ainsi que sont cr\u00e9\u00e9es les substances canc\u00e9rig\u00e8nes<\/h2>\n<p>Les nitrates et les nitrites, lorsque l&rsquo;organisme les convertit en oxyde nitrique, peuvent avoir un effet positif sur la sant\u00e9 du c\u0153ur et du cerveau : par exemple, ils dilatent les vaisseaux sanguins et am\u00e9liorent l&rsquo;apport d&rsquo;oxyg\u00e8ne au muscle cardiaque. <\/p>\n<\/div>\n<div data-hk=\"0000a104212000a22270\" class=\"Ad-Row\">\n<div class=\"Ad-Col col-lg-5\">\n<div data-hk=\"0000a104212000a2227104\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-desktop Ad-Slot-ver\" role=\"region\" aria-label=\"Anzeige 1\">\n<div id=\"ad-slot-desktop-ver-1\" data-orientation=\"ver\" data-index=\"1\" data-slot=\"ad-slot\" data-device=\"desktop\"><\/div>\n<\/div>\n<\/div>\n<div class=\"Ad-Col col-lg-5\">\n<aside data-hk=\"0000a104212000a2227204\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-desktop Ad-Slot-ver Ad-Slot-FC\">\n<div class=\"Ad-Slot-FC-Container\">\n<div class=\"Ad-Slot-FC-Window\">\n<div id=\"ad-slot-desktop-ver-2\" data-orientation=\"ver\" data-index=\"2\" data-slot=\"ad-slot\" data-device=\"desktop\"><\/div>\n<\/div>\n<\/div>\n<\/aside>\n<\/div>\n<\/div>\n<div data-hk=\"0000a104212000a22280\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<p>Cependant, les nitrates provenant des aliments et les nitrates transform\u00e9s en nitrites peuvent former des substances canc\u00e9rig\u00e8nes et mutag\u00e8nes. On les appelle des nitrosamines. Cela est d\u00fb \u00e0 une r\u00e9action chimique qui se produit facilement dans des environnements acides tels que l\u2019estomac.<\/p>\n<\/div>\n<aside data-hk=\"0000a104212000a222904\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-mobile Ad-Slot-hor\">\n<div id=\"ad-slot-mobile-hor-3\" data-orientation=\"hor\" data-index=\"3\" data-slot=\"ad-slot\" data-device=\"mobile\"><\/div>\n<\/aside>\n<div data-hk=\"0000a104212000a222a100\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<h2>Les aliments riches en vitamine C comme bouclier protecteur<\/h2>\n<p>Cependant, comme l&rsquo;ont d\u00e9couvert les chercheurs dirig\u00e9s par l&rsquo;auteur principal Gordon McNicol, la vitamine C peut agir comme un bouclier protecteur dans ce processus chimique et r\u00e9duire la formation de nitrosamines. C&rsquo;est particuli\u00e8rement le cas si l&rsquo;aliment consomm\u00e9 contient de la vitamine C en plus du nitrate ou du nitrite. Des exemples de tels aliments sont\u00a0:<\/p>\n<\/div>\n<div data-hk=\"0000a104212000a222a110\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<ul>\n<li>Tomates<\/li>\n<li>paprika<\/li>\n<li>\u00e9pinard<\/li>\n<li>m\u00e2che<\/li>\n<li>Roquette<\/li>\n<li>Betterave<\/li>\n<li>fenouil<\/li>\n<li>Chou-rave<\/li>\n<li>et des radis. <\/li>\n<\/ul>\n<p>L\u2019\u00e9quipe de recherche a \u00e9galement d\u00e9couvert que la prise de suppl\u00e9ments de vitamine C apr\u00e8s chaque repas pouvait \u00e9galement r\u00e9duire le risque de cancer.<\/p>\n<\/div>\n<aside data-hk=\"0000a104212000a222a1204\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-mobile Ad-Slot-hor\">\n<div id=\"ad-slot-mobile-hor-4\" data-orientation=\"hor\" data-index=\"4\" data-slot=\"ad-slot\" data-device=\"mobile\"><\/div>\n<\/aside>\n<div data-hk=\"0000a104212000a222a130\" class=\"Article-ReusableText Html-Block\" data-qa-article-reusable-content-text><!--$--><!--\/--><!--$--><!--\/--><\/p>\n<div>\n<p>La Soci\u00e9t\u00e9 allemande de nutrition (DGE) conseille aux adultes de consommer environ 100 milligrammes de vitamine C par jour. Cette recommandation quotidienne est d\u00e9j\u00e0 couverte par une ou deux oranges, explique l&rsquo;experte en nutrition Silke Restemeyer dans une interview \u00e0 \u00ab Apotheken Umschau \u00bb.<\/p>\n<p>D&rsquo;autres aliments contiennent beaucoup de vitamine C :<\/p>\n<ul>\n<li>Cassis : 177 milligrammes de vitamine C pour 100 grammes<\/li>\n<li>Piment rouge : 140 milligrammes<\/li>\n<li>Choux de Bruxelles (cuits) : 76 milligrammes<\/li>\n<li>Brocoli (cuit)\u00a0: 73 milligrammes<\/li>\n<li>Fraises\u00a0: 57 milligrammes<\/li>\n<li>Chou-fleur (cuit) : 49 milligrammes<\/li>\n<li>Framboise : 25 milligrammes<\/li>\n<li>Tomates : 19 milligrammes<\/li>\n<li>Pommes de terre (cuites) : 15 milligrammes<\/li>\n<\/ul>\n<p>Les fruits et l\u00e9gumes crus contiennent le plus de vitamine C. Comme ils sont solubles dans l&rsquo;eau et sensibles \u00e0 la chaleur, les l\u00e9gumes ne doivent \u00eatre cuits \u00e0 la vapeur que bri\u00e8vement et avec un peu d&rsquo;eau, explique Restemeyer.<\/p>\n<\/div>\n<\/div>\n<div data-hk=\"0000a104212000a222a140\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<h2>Raison pour plus d\u2019\u00e9tudes sur la vitamine C<\/h2>\n<p>Selon Anita Layton, professeur de math\u00e9matiques appliqu\u00e9es, cette \u00e9tude fournit une \u00ab feuille de route pour les futures \u00e9tudes cliniques et de laboratoire en identifiant les principaux facteurs d&rsquo;interaction dans ces r\u00e9actions chimiques potentiellement nocives, notamment l&rsquo;exposition aux nitrites, la consommation d&rsquo;antioxydants, les heures de repas, les conditions gastriques et l&rsquo;activit\u00e9 du microbiome oral. \u00bb <\/p>\n<\/div>\n<aside data-hk=\"0000a104212000a222a1504\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-mobile Ad-Slot-hor\">\n<div id=\"ad-slot-mobile-hor-5\" data-orientation=\"hor\" data-index=\"5\" data-slot=\"ad-slot\" data-device=\"mobile\"><\/div>\n<\/aside>\n<aside data-hk=\"0000a104212000a222a1604\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-desktop Ad-Slot-hor Ad-Slot-FC\">\n<div class=\"Ad-Slot-FC-Container\">\n<div class=\"Ad-Slot-FC-Window\">\n<div id=\"ad-slot-desktop-hor-2\" data-orientation=\"hor\" data-index=\"2\" data-slot=\"ad-slot\" data-device=\"desktop\"><\/div>\n<\/div>\n<\/div>\n<\/aside>\n<div data-hk=\"0000a104212000a222a170\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<p>Les scientifiques sont parvenus \u00e0 leurs conclusions en utilisant une mod\u00e9lisation math\u00e9matique de la glande salivaire, de l&rsquo;estomac, de l&rsquo;intestin gr\u00eale et du plasma. Cela simulait la fa\u00e7on dont les nitrates et les nitrites se d\u00e9placent dans le corps et comment ils \u00e9voluent au fil du temps. <\/p>\n<\/div>\n<div data-hk=\"0000a104212000a222a180\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<p>La mod\u00e9lisation math\u00e9matique est un processus dans lequel des probl\u00e8mes du monde r\u00e9el sont transf\u00e9r\u00e9s aux math\u00e9matiques sous une forme simplifi\u00e9e, puis ramen\u00e9s \u00e0 la r\u00e9alit\u00e9 apr\u00e8s les avoir r\u00e9solus. <\/p>\n<\/div>\n<aside data-hk=\"0000a104212000a222a1904\" data-qa-ad-slot class=\"Ad-Slot Ad-Slot-mobile Ad-Slot-hor\">\n<div id=\"ad-slot-mobile-hor-6\" data-orientation=\"hor\" data-index=\"6\" data-slot=\"ad-slot\" data-device=\"mobile\"><\/div>\n<\/aside>\n<div data-hk=\"0000a104212000a222a200\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<h2>Aliments riches en vitamine C dans le cadre d&rsquo;une alimentation saine<\/h2>\n<p>Plusieurs \u00e9tudes ont montr\u00e9 par le pass\u00e9 qu\u2019une alimentation riche en vitamine C pouvait r\u00e9duire le risque de cancer. \u00ab\u00a0Cependant, cette observation ne constitue pas un argument en faveur d&rsquo;une suppl\u00e9mentation en vitamine C\u00a0\u00bb, explique le docteur en nutrition Martin Smollich dans son livre \u00ab\u00a0The Nutrient Compass\u00a0\u00bb. Le professeur n\u2019a pas particip\u00e9 \u00e0 l\u2019\u00e9tude. \u00ab\u00a0Le risque r\u00e9duit de cancer n&rsquo;est observ\u00e9 qu&rsquo;avec les aliments riches en vitamine C, pas avec les suppl\u00e9ments de vitamine C.\u00a0\u00bb<\/p>\n<\/div>\n<div data-hk=\"0000a104212000a222a210\" class=\"Html-Block\" data-qa-article-content-text data-text-milestone-block>\n<p>En outre, Smollich souligne que les aliments riches en vitamine C contiennent souvent \u00e9galement d&rsquo;importants macronutriments et substances v\u00e9g\u00e9tales &#8211; et sont g\u00e9n\u00e9ralement sains. L\u2019apport en vitamine C enregistr\u00e9 dans les \u00e9tudes n\u2019est donc souvent qu\u2019un indicateur d\u2019une alimentation d\u00e9j\u00e0 saine. Cela pourrait pr\u00e9venir le cancer.<\/p>\n<\/div>\n<div data-hk=\"0000a104212000a222a220\" data-qa-article-cwc-widget class=\"Article-CwcWidget\">\n<div data-hk=\"0000a104212000a222a2210\" class=\"CwcWidget-Wrapper mb-xl\"><!--!$e0000a104212000a222a22110--><\/p>\n<section data-hk=\"0000a104212000a222a22110000\" class=\"Boost-List\" data-qa-boost-list><!--$--><!--\/--><!--$--><!--\/--><!--$--><\/p>\n<ul data-hk=\"0000a104212000a222a2211000300\" class=\"RUC-List RUC-List--Theme-Brand RUC-List--Spacing-SM \" data-qa-boost-list-items=\"https:\/\/www.focus.de\/gesundheit\/news\/true\">\n<li data-hk=\"0000a104212000a222a221100030200\" class=\"\">\n<article data-hk=\"0000a104212000a222a2211000302010\" class=\"Boost-List-Article \" data-qa-boost-list-article><!--$--><!--\/--><!--$--><\/p>\n<figure data-hk=\"0000a104212000a222a221100030201201\" class=\"Boost-List-Article-Figure\"><!--$--><!--\/--><!--$--><\/p>\n<div data-hk=\"0000a104212000a222a2211000302012030000\" data-qa-image-container class=\"Image-Container aspect-ratio-box aspect-4-3\"><\/div>\n<p><!--\/--><!--$--><figcaption data-hk=\"0000a104212000a222a2211000302012040\">\n<p data-hk=\"0000a104212000a222a2211000302012000\" class=\"Image-Credit mt-xs mb-0\">Source des images\u00a0: <!--$-->GU<!--\/--><\/p>\n<\/figcaption><!--\/--><\/figure>\n<p><!--\/--><\/p>\n<div class=\"Boost-List-Article-Header\">\n<p class=\"unified-headline-sm mb-sm\" data-qa-boost-list-article-title>La boussole des nutriments<\/p>\n<div class=\"Html-Block unified-text-base mb-xs\" data-qa-boost-list-article-text>\n<p>Ce qui est essentiel, ce qui est superflu et ce qui est dangereux par Martin Smollich<\/p>\n<\/div>\n<p><!--$--><!--\/--><\/div>\n<p><!--$--><!--\/--><\/article>\n<\/li>\n<\/ul>\n<p><!--\/--><\/section>\n<p><!--!$\/e0000a104212000a222a22110--><\/div>\n<\/div>\n<p><!--\/--><br \/>\n<!--$--><br \/>\n<!--\/--><br \/>\n<!--$--><br \/>\n<!--\/--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La vitamine C soutient le syst\u00e8me immunitaire, la production de collag\u00e8ne et prot\u00e8ge les cellules.<\/p>\n","protected":false},"author":1,"featured_media":16858,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[391,288,16,658,40,46,845],"class_list":["post-16857","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-maladies","tag-cancer","tag-chercheurs","tag-des","tag-reduit","tag-risque","tag-selon","tag-vitamine","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - 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