{"id":80646,"date":"2018-04-13T12:23:20","date_gmt":"2018-04-13T12:23:20","guid":{"rendered":"http:\/\/humanitasnet-new.local\/enciclopedia\/vitamina-a\/"},"modified":"2018-04-13T12:23:20","modified_gmt":"2018-04-13T12:23:20","slug":"vitamina-a","status":"publish","type":"enciclopedia","link":"https:\/\/humanitas-net.humweb.webiz.team\/ro\/wiki\/vitamina-a\/","title":{"rendered":"Vitamina A"},"content":{"rendered":"<h2 id=\"ce-este-vitamina-a\">Ce este vitamina A?<\/h2>\n<p>Vitamina A, sau retinolul, este parte din compu\u0219i gra\u0219i solubili, care sunt depozita\u021bi \u00een ficat \u0219i elibera\u021bi \u00een doze mici oric\u00e2nd este necesar. A\u0219adar, nu este necesar s\u0103 fie administrat\u0103 regulat, cum ar fi prin alimente.<\/p>\n<p>Exist\u0103 cel pu\u021bin 1.500 de tipuri diferite de vitamina A, cum ar fi retinoizi, cunoscu\u021bi ca retinol, retinal, acid retinoic sau compu\u0219ii aferen\u021bi.<\/p>\n<h2 id=\"care-este-rolul-vitaminei-a\">Care este rolul vitaminei A?<\/h2>\n<p>Vitamina A sau retinolul are o important\u0103 fundamental\u0103 datorit\u0103 precursorilor, carotenoidele. Carotenoidele sunt o parte din componentele rodopsinei, o substan\u021b\u0103 din retin\u0103 care protejeaz\u0103 ochiul de sensibilitatea la lumin\u0103. Vitamina A este folositoare pentru rezisten\u021ba oaselor \u0219i dezvoltare (cre\u0219terea din\u021bilor) \u0219i se diferen\u021biaz\u0103 prin abilitatea de a furniza r\u0103spuns imunitar \u00een corp. Anumite concluzii \u0219tiin\u021bifice au ar\u0103tat c\u0103 vitamina A are capacitate de protec\u021bie \u00eempotriva tumorii.<\/p>\n<h2 id=\"ce-mancaruri-sunt-bogate-in-vitamina-a\">Ce m\u00e2nc\u0103ruri sunt bogate \u00een vitamina A?<\/h2>\n<p>Vitamina A sau retinolul este prezent\u0103 \u00een multe alimente de origine animal\u0103, cum ar fi ficatul, produsele lactate (lapte, unt \u0219i br\u00e2nz\u0103) \u0219i ou\u0103.<\/p>\n<p>Este prezent\u0103 \u00een fructe \u0219i legume, cum ar fi caisa, morcovii, pepenele, s\u00e2mburi \u0219i ro\u0219ii (ro\u0219ii, galbene \u0219i portocalii).<\/p>\n<p>Vitamina A este sensibil\u0103 la c\u0103ldur\u0103 \u0219i \u00ee\u0219i poate pierde calitatea pe durata g\u0103tirii, de aceea trebuie consumat\u0103 natural\u0103 sau dup\u0103 ce a fost g\u0103tit\u0103 pentru o perioad\u0103 scurt\u0103 de timp.<\/p>\n<p>Care este cerin\u021ba zilnic\u0103 de vitamina A?<\/p>\n<p>Cerin\u021ba zilnic\u0103 de vitamina A sau retinol este de aproximativ 0.6 &#8211; 0.7 mg (poate cre\u0219te p\u00e2n\u0103 la 0.95 mg pe durata lacta\u021biei).<\/p>\n<h2 id=\"deficienta-de-vitamina-a\">Deficien\u021ba de vitamina A<\/h2>\n<p>Deficien\u021ba de vitamina A sau retinol poate cauza defecte de vedere \u0219i, \u00een timp, poate duce la orbire.<\/p>\n<p>\u00cen general, deficien\u021ba vitaminei A poate duce la o cre\u0219tere \u0219i dezvoltare \u00eent\u00e2rziat\u0103 \u0219i poate cauzate sensibilit\u0103\u021bi severe la infec\u021bii. La femeile care sunt \u00eens\u0103rcinate, poate duce la malforma\u021bii fetale.<\/p>\n<h2 id=\"ingerarea-excesiva-de-vitamina-a\">Ingerarea excesiv\u0103 de vitamina A<\/h2>\n<p>Nivelul mare de vitamina A se poate acumula \u00een ficat \u0219i poate crea probleme de hipervitaminoz\u0103, care pot cauza probleme cu ficatul \u0219i splina.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"featured_media":0,"parent":0,"template":"","Example":[1780],"class_list":["post-80646","enciclopedia","type-enciclopedia","status-publish","hentry","enciclopedia_category-vitamina"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Vitamina A - Humanitas.net<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Vitamina A - Humanitas.net\" \/>\n<meta property=\"og:description\" content=\"Ce este vitamina A? 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