{"id":16443,"date":"2020-07-23T00:00:00","date_gmt":"2020-07-22T22:00:00","guid":{"rendered":"https:\/\/www.ecoceutics.com\/la-vitamina-a-la-vitamina-mes-versatil\/"},"modified":"2023-04-11T17:58:57","modified_gmt":"2023-04-11T15:58:57","slug":"la-vitamina-a-la-vitamina-mes-versatil","status":"publish","type":"post","link":"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/la-vitamina-a-la-vitamina-mes-versatil\/","title":{"rendered":"La vitamina A: la vitamina m\u00e9s vers\u00e0til"},"content":{"rendered":"<p>La vitamina A \u00e9s una vitamina pertanyent a la fam\u00edlia de les vitamines liposolubles, \u00e9s a dir, afins pels l\u00edpids i greixos m\u00e9s que per les subst\u00e0ncies aquoses. Compleix diversos rols en el nostre organisme, ja que depenent de la forma qu\u00edmica pot tenir diferents propietats.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contenido de la p\u00e1gina<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #333333;color:#333333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #333333;color:#333333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/la-vitamina-a-la-vitamina-mes-versatil\/#que-es-la-vitamina-a\" >Qu\u00e8 \u00e9s la vitamina A?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/la-vitamina-a-la-vitamina-mes-versatil\/#quines-funcions-compleix-la-vitamina-a-en-el-nostre-organisme\" >Quines funcions compleix la vitamina A en el nostre organisme?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/la-vitamina-a-la-vitamina-mes-versatil\/#quins-aliments-son-rics-en-vitamina-a\" >Quins aliments s\u00f3n rics en vitamina A?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/la-vitamina-a-la-vitamina-mes-versatil\/#que-passa-quan-hi-ha-deficiencia-de-vitamina-a\" >Qu\u00e8 passa quan hi ha defici\u00e8ncia de vitamina A?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/la-vitamina-a-la-vitamina-mes-versatil\/#quins-altres-usos-te-la-vitamina-a\" >Quins altres usos t\u00e9 la vitamina A?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"que-es-la-vitamina-a\"><\/span>Qu\u00e8 \u00e9s la vitamina A?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Quan parlem de vitamina A en realitat parlem de diverses mol\u00e8cules, entre les quals comptem el retinol, el retinal i l\u2019\u00e0cid retinoic. Les tres comparteixen un cos igual, per\u00f2 canvien en un extrem de la mol\u00e8cula: el retinol \u00e9s un alcohol, el retinal \u00e9s un aldehid, i l\u2019\u00e0cid retinoic \u00e9s un \u00e0cid carbox\u00edlic. I parlem d\u2019\u00e8sters de&nbsp;retinil&nbsp;(o&nbsp;retinil&nbsp;\u00e8sters) quan l\u2019\u00e0cid retinoic ha reaccionat amb altres alcohols. Aquestes petites variacions qu\u00edmiques li donaran a aquestes mol\u00e8cules la possibilitat de complir diferents funcions en el nostre organisme.<br \/>\nLa vitamina A&nbsp;s\u2019emmagatzema&nbsp;fonamentalment com a \u00e8sters de&nbsp;retinil&nbsp;en el fetge. Des d\u2019all\u00e0 es transporta com retinol a la resta de l\u2019organisme, on complir\u00e0 les seves funcions com retinol, com a retinal o com a \u00e0cid&nbsp;retinoic.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"quines-funcions-compleix-la-vitamina-a-en-el-nostre-organisme\"><\/span>Quines funcions compleix la vitamina A en el nostre organisme?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hem parlat una mica&nbsp;de les funcions&nbsp;de la vitamina A en els nostres articles sobre <a href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/vitamines-per-a-la-vista\/\">\u00abvitamines per a la vista\u00bb<\/a>, <a href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/vitamines-per-a-la-cara\/\">\u00abvitamines per a la cara\u00bb<\/a>, <a href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/vitamines-per-a-les-ungles\/\">\u00abvitamines per a les ungles\u00bb<\/a> i <a href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/vitamines-i-minerals-per-al-sistema-immunitari\/\">\u00abvitamines per al sistema immune\u00bb<\/a>. Altres funcions de la vitamina A, sense entrar en grans descripcions metab\u00f2liques, s\u00f3n:<\/p>\n<ul>\n<li>El retinol interv\u00e9 en la regulaci\u00f3 de gens relacionats amb la s\u00edntesi d\u2019hormones i de citocines (mol\u00e8cules amb activitat immunit\u00e0ria).<\/li>\n<li>El retinal est\u00e0 implicat en la regulaci\u00f3 de gens relacionats amb el metabolisme lip\u00eddic<\/li>\n<li>Tant l\u2019exc\u00e9s com la falta de vitamina A estan relacionats amb defectes en el desenvolupament del beb\u00e8 durant l\u2019embar\u00e0s. L\u2019\u00e0cid&nbsp;retinoic&nbsp;\u00e9s cr\u00edtic per al desenvolupament del cor, ulls, pulmons i altres \u00f2rgans.<\/li>\n<li>Alguns estudis in vitro indiquen que la vitamina A compleix una funci\u00f3 important en el correcte desenvolupament dels gl\u00f2buls vermells.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"quins-aliments-son-rics-en-vitamina-a\"><\/span>Quins aliments s\u00f3n rics en vitamina A?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Els aliments vegetals s\u00f3n rics en beta-carotens&nbsp;i altres carotenoides, mol\u00e8cules que el nostre cos \u00e9s capa\u00e7 de&nbsp;metabolitzar&nbsp;a vitamina A. Alguns aliments rics en carotenoides s\u00f3n:<\/p>\n<ul>\n<li>Pastanagues<\/li>\n<li>Carabasses<\/li>\n<li>Melons<\/li>\n<li>Espinacs<\/li>\n<li>Kale<\/li>\n<\/ul>\n<p>Els aliments d\u2019origen animal s\u00f3n m\u00e9s rics en&nbsp;retinil&nbsp;\u00e8sters, ja que \u00e9s la forma en la qual els teixits animals emmagatzemen la vitamina A. Entre els aliments d\u2019origen animal m\u00e9s rics en vitamina A trobem:<\/p>\n<ul>\n<li>Fetge de vedella<\/li>\n<li>Fetge de bacall\u00e0<\/li>\n<li>Ous<\/li>\n<li>Llet sencera (la descremada perd part del seu contingut vitam\u00ednic en perdre el greix)<\/li>\n<\/ul>\n<p>Si desitges saber m\u00e9s sobre els requeriments de vitamina A i els aliments que la contenen pots veure aquest article (aliments amb vitamina A&nbsp;).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"que-passa-quan-hi-ha-deficiencia-de-vitamina-a\"><\/span>Qu\u00e8 passa quan hi ha defici\u00e8ncia de vitamina A?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Els estats de car\u00e8ncia s\u2019han relacionat amb diversos problemes de salut:<\/p>\n<ul>\n<li>Problemes de visi\u00f3. La falta de vitamina A comen\u00e7a com a problemes per a veure en la nit i evoluciona a sequedat ocular severa que, si no es tracta, pot arribar a \u00falceres corneals i ceguesa. Els nens de diversos pa\u00efsos del m\u00f3n encara sofreixen casos de ceguesa irreversible per d\u00e8ficit de vitamina A.<\/li>\n<li>Major susceptibilitat a malalties infeccioses, sobretot en nens.<\/li>\n<li>Major susceptibilitat a la falta de iode que porta a malaltia tiroidal.<\/li>\n<li>Empitjorament de l\u2019an\u00e8mia per falta de ferro. Algunes an\u00e8mies ferrop\u00e8niques (no totes) es recuperen millor quan es combina el ferro amb la vitamina A.<\/li>\n<li>Sequedat i alteracions de pell i mucoses.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"quins-altres-usos-te-la-vitamina-a\"><\/span>Quins altres usos t\u00e9 la vitamina A?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>La vitamina A t\u00e9 molta utilitat en el camp de la cosm\u00e8tica:<\/p>\n<ul>\n<li>El retinol \u00e9s la mol\u00e8cula&nbsp;antiedat&nbsp;per excel\u00b7l\u00e8ncia, ja que pot canviar l\u2019aspecte les arrugues.<\/li>\n<li>Les mol\u00e8cules relacionades amb l\u2019\u00e0cid&nbsp;retinoic&nbsp;tenen una excel\u00b7lent activitat antiacneica.<\/li>\n<li>\u00c9s com\u00fa veure que les cremes i pomades reparadores continguin vitamina A en la seva formulaci\u00f3.<\/li>\n<li>Existeixen cremes hidratants per a utilitzar a l\u2019interior de l\u2019ull que s\u00f3n molt riques en vitamina A.<\/li>\n<\/ul>\n<p>Com veus, \u00e9s una vitamina molt vers\u00e0til que no ha de faltar en la teva dieta ni en la teva rutina de bellesa. Si creus que pots beneficiar-te de l\u2019\u00fas de la vitamina A consulta amb el teu farmac\u00e8utic de confian\u00e7a, que sabr\u00e0 ajudar-te a valorar les teves necessitats i sabr\u00e0 recomanar-te productes adequats per a tu.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La vitamina A \u00e9s una vitamina pertanyent a la fam\u00edlia de les vitamines liposolubles, \u00e9s a dir, afins pels l\u00edpids i greixos m\u00e9s que per les subst\u00e0ncies aquoses. Compleix diversos rols en el nostre organisme, ja que depenent de la forma qu\u00edmica pot tenir diferents propietats. Qu\u00e8 \u00e9s la vitamina A? Quan parlem de vitamina [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":19499,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[4,59],"tags":[],"class_list":["post-16443","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-respostes-de-salut","category-vitamines"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu\u00e8 \u00e9s la vitamina A i quines funciones t\u00e9? | ecoceutics<\/title>\n<meta name=\"description\" content=\"La vitamina A \u00e9s una vitamina que compleix diversos rols en el nostre organisme, ja que depenent de la forma qu\u00edmica pot tenir diferents propietats.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecoceutics.com\/ca\/respostes-de-salut\/vitamines\/la-vitamina-a-la-vitamina-mes-versatil\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu\u00e8 \u00e9s la vitamina A i quines funciones t\u00e9? 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