{"id":8380,"date":"2022-07-20T08:56:12","date_gmt":"2022-07-20T08:56:12","guid":{"rendered":"https:\/\/www.lifepronutrition.com\/blog\/general\/la-cafeine-proprietes-effets-secondaires-et-modes-de-consommation\/"},"modified":"2022-07-20T08:56:12","modified_gmt":"2022-07-20T08:56:12","slug":"la-cafeine-proprietes-effets-secondaires-et-modes-de-consommation","status":"publish","type":"post","link":"https:\/\/www.lifepronutrition.com\/blog\/fr\/sante\/la-cafeine-proprietes-effets-secondaires-et-modes-de-consommation\/","title":{"rendered":"La caf\u00e9ine. Propri\u00e9t\u00e9s, effets secondaires et modes de consommation."},"content":{"rendered":"<p>Caf\u00e9, th\u00e9, boissons \u00e9nergisantes\u2026 La caf\u00e9ine fait partie du quotidien d&#8217;un grand nombre de personnes. Du caf\u00e9 du matin au compl\u00e9ment pr\u00e9-entra\u00eenement, la caf\u00e9ine est l&#8217;un des compos\u00e9s \/ compl\u00e9ments les plus consomm\u00e9s.<\/p>\n<h2>Qu&#8217;est-ce que la caf\u00e9ine ?<\/h2>\n<p>La caf\u00e9ine est une substance au go\u00fbt amer, connue et caract\u00e9ris\u00e9e principalement par ses&nbsp;<strong>propri\u00e9t\u00e9s stimulantes&nbsp;<\/strong>du syst\u00e8me nerveux central. Elle peut \u00eatre obtenue \u00e0 partir de plus de 60 plantes, notamment des grains de caf\u00e9, des feuilles de th\u00e9, du guarana et du cacao, et peut m\u00eame \u00eatre produite synth\u00e9tiquement en laboratoire.<\/p>\n<p>Elle est class\u00e9e comme un <strong>alcalo\u00efde<\/strong>, qui fait partie de la famille des xanthines. Les xanthines sont un ensemble de substances aux propri\u00e9t\u00e9s stimulantes que l&#8217;on trouve de&nbsp;<strong>mani\u00e8re<\/strong>&nbsp;<strong>naturelle<\/strong>&nbsp;dans les esp\u00e8ces v\u00e9g\u00e9tales, avec&nbsp;<strong>la th\u00e9ophylline et la th\u00e9obromine. <\/strong>Elles peuvent \u00eatre pr\u00e9sentes dans les aliments mentionn\u00e9s dans la section pr\u00e9c\u00e9dente.<\/p>\n<h3>Quantit\u00e9s moyennes de caf\u00e9ine dans les boissons<\/h3>\n<ul>\n<li>Une tasse de caf\u00e9 : entre 70 et 90 mg.<\/li>\n<li>Boissons \u00e9nergisantes : entre 80 et 150 mg.<\/li>\n<li>Tasse de th\u00e9 noir : 50 mg<\/li>\n<li>Boissons au cola : entre 30 et 50 mg.<\/li>\n<li>Pr\u00e9-entra\u00eenements : entre 100 et 300 mg.<\/li>\n<\/ul>\n<h2>Les effets de la caf\u00e9ine<\/h2>\n<ul>\n<li>Elle agit en stimulant le syst\u00e8me nerveux central.<\/li>\n<li>Elle augmente la sensation d&#8217;\u00e9nergie et de vitalit\u00e9.<\/li>\n<li><strong> Elle favorise le maintien de l&#8217;\u00e9veil.<\/strong><\/li>\n<li>Elle r\u00e9duit la perception de la fatigue et aide \u00e0 la repousser.<\/li>\n<li>Effet diur\u00e9tique.<\/li>\n<li><strong> Effet thermog\u00e9nique : elle favorise l&#8217;augmentation de la temp\u00e9rature corporelle.<\/strong><\/li>\n<li>Elle augmente la concentration mentale.<\/li>\n<li>Augmentation des performances sportives.<\/li>\n<li><strong> Elle augmente l&#8217;\u00e9tat d&#8217;alerte et les fonctions cognitives.<\/strong><\/li>\n<li>Elle am\u00e9liore la capacit\u00e9 de concentration.<\/li>\n<\/ul>\n<h3>Types de caf\u00e9ine et m\u00e9canisme d&#8217;action<\/h3>\n<p>La caf\u00e9ine agit&nbsp;<strong>en inhibant les r\u00e9cepteurs de l&#8217;ad\u00e9nosine<\/strong>, car sa structure mol\u00e9culaire est tr\u00e8s similaire \u00e0 celle de ces r\u00e9cepteurs, notamment les r\u00e9cepteurs A1 (r\u00e9partis le long du syst\u00e8me nerveux central).<\/p>\n<p>Ce compos\u00e9 produit ses effets stimulants et l&#8217;excitation en lib\u00e9rant l&#8217;inhibition tonique de la dopamine, ainsi que les r\u00e9cepteurs A2A situ\u00e9s dans des r\u00e9gions riches en&nbsp;<strong>neurones dopaminergiques<\/strong>. La caf\u00e9ine commence \u00e0 agir selon le format et la dose consomm\u00e9e, dans un d\u00e9lai compris entre&nbsp;<strong>15 et 60 minutes. <\/strong><\/p>\n<p>Pour l&#8217;\u00e9liminer, l&#8217;organisme aura besoin d&#8217;une dur\u00e9e plus ou moins longue en fonction de facteurs tels que l&#8217;\u00e2ge, l&#8217;\u00e9tat physiologique, la tol\u00e9rance, la quantit\u00e9 consomm\u00e9e, les m\u00e9dicaments, etc. Il faut en moyenne deux \u00e0 huit heures pour son \u00e9limination compl\u00e8te.<\/p>\n<h2>Les effets secondaires de la caf\u00e9ine<\/h2>\n<p>La caf\u00e9ine est une substance dont la consommation entra\u00eene une d\u00e9pendance. Pour continuer \u00e0 ressentir les m\u00eames effets au fil du temps, il est n\u00e9cessaire d&#8217;augmenter la quantit\u00e9 \u00e0 mesure que l&#8217;organisme s&#8217;y habitue.<\/p>\n<p>En r\u00e8gle g\u00e9n\u00e9rale, il est recommand\u00e9 de ne pas d\u00e9passer 400 mg par jour.<\/p>\n<p><strong>Autres effets secondaires<\/strong> que peut entra\u00eener sa consommation excessive :<\/p>\n<ul>\n<li>Anxi\u00e9t\u00e9<\/li>\n<li>Nervosit\u00e9.<\/li>\n<li>Maux de t\u00eate.<\/li>\n<li>Insomnie.<\/li>\n<li>Tremblements.<\/li>\n<li>Acc\u00e9l\u00e9ration du rythme cardiaque.<\/li>\n<li>Augmentation de la pression art\u00e9rielle.<\/li>\n<li>Vertiges.<\/li>\n<li>Agitation.<\/li>\n<\/ul>\n<h2>Types de caf\u00e9ine<\/h2>\n<p><strong>Caf\u00e9ine anhydre<\/strong> : c&#8217;est l&#8217;une des formes les plus utilis\u00e9es. Elle se caract\u00e9rise par une absorption tr\u00e8s rapide, en moyenne en 15 minutes, et atteint son pic sanguin maximal entre 30 et 60 minutes.<\/p>\n<p><strong>Caf\u00e9ine \u00e0 lib\u00e9ration prolong\u00e9e :<\/strong>&nbsp;ses effets ne sont ni aussi forts ni aussi imm\u00e9diats. Elle se caract\u00e9rise par une action prolong\u00e9e dans le temps.<\/p>\n<p><strong>Di-caf\u00e9ine malate : <\/strong>la forme la moins utilis\u00e9e<strong>. <\/strong>&nbsp;Il s&#8217;agit d&#8217;une combinaison de caf\u00e9ine et d&#8217;acide malique, destin\u00e9e \u00e0 am\u00e9liorer l&#8217;absorption et \u00e0 r\u00e9duire les probl\u00e8mes digestifs.<\/p>\n<h3>Comment \u00e9viter ou r\u00e9duire la tol\u00e9rance \u00e0 la caf\u00e9ine ?<\/h3>\n<p>Avec le temps, le corps s&#8217;habitue \u00e0 la quantit\u00e9 de caf\u00e9ine que nous ing\u00e9rons. Pour ressentir le m\u00eame effet, il est n\u00e9cessaire d&#8217;augmenter la dose.<\/p>\n<p>De temps en temps, il est recommand\u00e9 de suivre le protocole connu sous le nom de sevrage de la caf\u00e9ine.<\/p>\n<p>Un sevrage de la caf\u00e9ine est une p\u00e9riode durant laquelle nous r\u00e9duisons notre consommation de caf\u00e9ine, en diminuant totalement ou progressivement, selon les pr\u00e9f\u00e9rences, la quantit\u00e9 ing\u00e9r\u00e9e, afin que l&#8217;organisme s&#8217;habitue aux nouvelles doses et que nous puissions continuer \u00e0 en r\u00e9duire la consommation sans renoncer compl\u00e8tement \u00e0 ses effets.<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-center kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;center&quot;,&quot;id&quot;:&quot;8380&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Valora el articulo&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 votos)&quot;,&quot;size&quot;:&quot;22&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 22px; height: 22px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 17.6px;\">\n            <span class=\"kksr-muted\">Valora el articulo<\/span>\n    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Caf\u00e9, th\u00e9, boissons \u00e9nergisantes\u2026 La caf\u00e9ine fait partie du quotidien d&#8217;un grand nombre de personnes. Du caf\u00e9 du matin au compl\u00e9ment pr\u00e9-entra\u00eenement, la caf\u00e9ine est l&#8217;un des compos\u00e9s \/ compl\u00e9ments les plus consomm\u00e9s. Qu&#8217;est-ce que &#8230; <a title=\"La caf\u00e9ine. Propri\u00e9t\u00e9s, effets secondaires et modes de consommation.\" class=\"read-more\" href=\"https:\/\/www.lifepronutrition.com\/blog\/fr\/sante\/la-cafeine-proprietes-effets-secondaires-et-modes-de-consommation\/\" aria-label=\"M\u00e1s en La caf\u00e9ine. Propri\u00e9t\u00e9s, effets secondaires et modes de consommation.\">Leer m\u00e1s<\/a><\/p>\n","protected":false},"author":1,"featured_media":54,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wprm-recipe-roundup-name":"","wprm-recipe-roundup-description":"","footnotes":""},"categories":[535],"tags":[],"ppma_author":[665],"class_list":["post-8380","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sante","masonry-post","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La caf\u00e9ine. Propri\u00e9t\u00e9s, effets secondaires et modes de consommation. - Blog Life Pro Nutrition<\/title>\n<meta name=\"description\" content=\"Tout savoir sur : La caf\u00e9ine. 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