{"id":82539,"date":"2025-07-01T00:22:20","date_gmt":"2025-06-30T22:22:20","guid":{"rendered":"https:\/\/www.infokuryr.cz\/n\/?p=82539"},"modified":"2025-06-30T18:39:37","modified_gmt":"2025-06-30T16:39:37","slug":"temna-stranka-retinoidu-toxicita-rizika-a-iluze-dokonale-pokozky","status":"publish","type":"post","link":"https:\/\/www.infokuryr.cz\/n\/2025\/07\/01\/temna-stranka-retinoidu-toxicita-rizika-a-iluze-dokonale-pokozky\/","title":{"rendered":"Temn\u00e1 str\u00e1nka retinoid\u016f: Toxicita, rizika a iluze dokonal\u00e9 poko\u017eky"},"content":{"rendered":"<div id=\"fb-root\"><\/div>\n<p><strong>Dermatologick\u00fd a kosmetick\u00fd pr\u016fmysl ji\u017e dlouho slav\u00ed retinoidy, syntetick\u00e9 deriv\u00e1ty vitam\u00ednu A, jako z\u00e1zra\u010dn\u00e9 prost\u0159edky proti akn\u00e9 a st\u00e1rnut\u00ed.<\/strong><\/p>\n<p><span>Tyto slou\u010deniny prod\u00e1van\u00e9 pod ok\u00e1zal\u00fdmi n\u00e1zvy jako retinol, tretinoin \u010di adapalen slibuj\u00ed hlad\u0161\u00ed ple\u0165, m\u00e9n\u011b vr\u00e1sek a ple\u0165 bez nedokonalost\u00ed.<\/span><\/p>\n<p><span>Pod leskl\u00fdm marketingem se v\u0161ak skr\u00fdv\u00e1 znepokojuj\u00edc\u00ed realita: Retinoidy jsou siln\u00e9 chemik\u00e1lie se zna\u010dnou toxicitou, kter\u00e9 mohou zp\u016fsobit z\u00e1va\u017en\u00e9 vedlej\u0161\u00ed \u00fa\u010dinky.<\/span><\/p>\n<p><span>P\u0159esto\u017ee retinoidy p\u0159in\u00e1\u0161ej\u00ed kr\u00e1tkodob\u00e1 kosmetick\u00e1 zlep\u0161en\u00ed, jejich dlouhodob\u00e1 bezpe\u010dnost v\u0161ak z\u016fst\u00e1v\u00e1 sporn\u00e1. Pro ty, kte\u0159\u00ed nejsou ochotni riskovat sv\u00e9 zdrav\u00ed, existuj\u00ed tak\u00e9 bezpe\u010dn\u011bj\u0161\u00ed alternativy.<\/span><\/p>\n<h2><span>Retinoidy: B\u011b\u017en\u00e9 pou\u017eit\u00ed a toxicita<\/span><\/h2>\n<p><span>Retinoidy jsou t\u0159\u00eddou slou\u010denin odvozen\u00fdch od vitam\u00ednu A (retinolu), av\u0161ak jsou synteticky modifikov\u00e1ny pro zv\u00fd\u0161en\u00ed jejich \u00fa\u010dink\u016f na poko\u017eku. Funguj\u00ed tak, \u017ee urychluj\u00ed obnovu bun\u011bk, uvol\u0148uj\u00ed p\u00f3ry a stimuluj\u00ed produkci kolagenu.<\/span><\/p>\n<p><span>Jedn\u00e1 se tedy o mechanismy, d\u00edky nim\u017e jsou \u00fa\u010dinn\u00e9 proti akn\u00e9 a p\u0159\u00edznak\u016fm st\u00e1rnut\u00ed.<\/span><\/p>\n<p><span>Mezi b\u011b\u017en\u00e9 retinoidy nach\u00e1zej\u00edc\u00ed se v kosmetice a l\u00e9c\u00edch na p\u0159edpis pat\u0159\u00ed:<\/span><\/p>\n<ul>\n<li><strong><span>retinol<\/span><\/strong><span>\u00a0\u2013 m\u00edrn\u011bj\u0161\u00ed voln\u011b prodejn\u00e1 forma pou\u017e\u00edvan\u00e1 v mnoha kr\u00e9mech proti st\u00e1rnut\u00ed<\/span><\/li>\n<li><strong><span>tretinoin (retin-A)<\/span><\/strong><span>\u00a0\u2013 siln\u011bj\u0161\u00ed retinoid na p\u0159edpis pou\u017e\u00edvan\u00fd na akn\u00e9 a vr\u00e1sky<\/span><\/li>\n<li><strong><span>adapalen (differin)<\/span><\/strong><span>\u00a0\u2013 p\u016fvodn\u011b byl dostupn\u00fd pouze na l\u00e9ka\u0159sk\u00fd p\u0159edpis, nyn\u00ed je dostupn\u00fd na akn\u00e9 i ve voln\u00e9m prodeji<\/span><\/li>\n<li><strong><span>isotretinoin (kyselina 13-cis retinov\u00e1, zccutane)<\/span><\/strong><span>\u00a0\u2013 peror\u00e1ln\u00ed retinoid ur\u010den\u00fd k l\u00e9\u010db\u011b z\u00e1va\u017en\u00e9ho cystick\u00e9ho akn\u00e9, kter\u00fd je zn\u00e1m\u00fd sv\u00fdmi extr\u00e9mn\u00edmi vedlej\u0161\u00edmi \u00fa\u010dinky<\/span><\/li>\n<\/ul>\n<p><span>Navzdory sv\u00e9 popularit\u011b nejsou retinoidy ne\u0161kodn\u00fdmi slo\u017ekami p\u00e9\u010de o ple\u0165. Jejich \u00fa\u010dinnost m\u00e1 i svou da\u0148, kterou si mnoz\u00ed spot\u0159ebitel\u00e9 neuv\u011bdomuj\u00ed, dokud nen\u00ed p\u0159\u00edli\u0161 pozd\u011b.<\/span><\/p>\n<h2><span>Jak jsou retinoidy toxick\u00e9<\/span><\/h2>\n<p><span>Retinoidy jsou biologicky aktivn\u00ed molekuly, kter\u00e9 naru\u0161uj\u00ed bun\u011b\u010dn\u00e9 procesy, a pr\u00e1v\u011b proto funguj\u00ed, ale z\u00e1rove\u0148 jsou nebezpe\u010dn\u00e9. Jejich toxicita se projevuje n\u011bkolika zp\u016fsoby:<\/span><\/p>\n<h3><span>1. Podr\u00e1\u017ed\u011bn\u00ed a po\u0161kozen\u00ed poko\u017eky<\/span><\/h3>\n<p><span>Retinoidy jsou zn\u00e1m\u00e9 t\u00edm, \u017ee zp\u016fsobuj\u00ed zarudnut\u00ed, olupov\u00e1n\u00ed a extr\u00e9mn\u00ed citlivost, co\u017e je jev naz\u00fdv\u00e1n \u201eretinoidn\u00ed dermatitida\u201c. U\u017eivatel\u00e9 \u010dasto sn\u00e1\u0161ej\u00ed t\u00fddny bolestiv\u00e9ho podr\u00e1\u017ed\u011bn\u00ed, ne\u017e se jim poko\u017eka p\u0159izp\u016fsob\u00ed, pokud se v\u016fbec n\u011bkdy p\u0159izp\u016fsob\u00ed.<\/span><\/p>\n<p><span>Hor\u0161\u00ed je, \u017ee retinoidy zvy\u0161uj\u00ed fotosenzitivitu, co\u017e znamen\u00e1, \u017ee poko\u017eka je zraniteln\u011bj\u0161\u00ed v\u016f\u010di UV z\u00e1\u0159en\u00ed, co\u017e ironicky urychluje st\u00e1rnut\u00ed a zvy\u0161uje riziko rakoviny.<\/span><\/p>\n<h3><span>2. Syst\u00e9mov\u00e1 toxicita a vrozen\u00e9 vady<\/span><\/h3>\n<p><span>Peror\u00e1ln\u00ed retinoidy jako isotretinoin (accutane) jsou teratogenn\u00ed, co\u017e znamen\u00e1, \u017ee zp\u016fsobuj\u00ed z\u00e1va\u017en\u00e9 vrozen\u00e9 vady.<\/span><\/p>\n<p><span>\u017deny, kter\u00fdm je p\u0159edeps\u00e1n isotretinoin, mus\u00ed dodr\u017eovat p\u0159\u00edsn\u00e9 programy prevence t\u011bhotenstv\u00ed, p\u0159esto \u010dasto doch\u00e1z\u00ed k ot\u011bhotn\u011bn\u00ed a n\u00e1sledn\u00fdm komplikac\u00edm.<\/span><\/p>\n<p><span>Dokonce i lok\u00e1ln\u011b aplikovan\u00e9 retinoidy (na poko\u017eku) maj\u00ed p\u0159\u00edsn\u00e1 varov\u00e1n\u00ed p\u0159ed pou\u017e\u00edv\u00e1n\u00edm b\u011bhem t\u011bhotenstv\u00ed kv\u016fli mo\u017en\u00e9 syst\u00e9mov\u00e9 absorpci.<\/span><\/p>\n<h3><span>3. Dlouhodob\u00e9 zdravotn\u00ed probl\u00e9my<\/span><\/h3>\n<p><span>Dlouhodb\u00e9 u\u017e\u00edv\u00e1n\u00ed retinoid\u016f m\u016f\u017ee naru\u0161it p\u0159irozenou funkci poko\u017eky, co\u017e vede k jej\u00edmu zten\u010den\u00ed (atrofii) a zhor\u0161en\u00ed jej\u00ed bari\u00e9rov\u00e9 \u200b\u200bfunkce.<\/span><\/p>\n<p><span>N\u011bkter\u00e9 studie nazna\u010duj\u00ed, \u017ee dlouhodob\u00e1 expozice retinoid\u016fm tak\u00e9 zp\u016fsobuje toxicitu jater, a\u010dkoli v\u00fdzkum z\u016fst\u00e1v\u00e1 nejednozna\u010dn\u00fd.<\/span><\/p>\n<p><span>Retinoidy se skr\u00fdvaj\u00ed ve znepokojiv\u00e9m mno\u017estv\u00ed produkt\u016f, \u010dasto pod zav\u00e1d\u011bj\u00edc\u00edmi ozna\u010den\u00edmi jako:<\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/www.badatel.net\/akne\/\"><span>l\u00e9\u010dba akn\u00e9<\/span><\/a><span>\u00a0(nap\u0159. Differine gel, Proactiv)<\/span><\/li>\n<li><span>kr\u00e9my proti st\u00e1rnut\u00ed (nap\u0159. RoC Retinol Correxion, Neutrogena Rapid Wrinkle Repair)<\/span><\/li>\n<li><span>l\u00e9ky na p\u0159edpis (nap\u0159. s \u00fa\u010dinnou l\u00e1tkou tazaroten)<\/span><\/li>\n<li><span>s\u00e9ra a no\u010dn\u00ed p\u0159\u00edpravky (nap\u0159. retinolov\u00e1 s\u00e9ra)<\/span><\/li>\n<\/ul>\n<p><span>Mnoz\u00ed spot\u0159ebitel\u00e9 se domn\u00edvaj\u00ed, \u017ee jeliko\u017e tyto produkty se prod\u00e1vaj\u00ed voln\u011b, mus\u00ed b\u00fdt bezpe\u010dn\u00e9. Toto je nebezpe\u010dn\u00e1 myln\u00e1 p\u0159edstava, proto\u017ee retinoidy jsou l\u00e9ky, nikoli ne\u0161kodn\u00e1 kosmetika.<\/span><\/p>\n<h2><span>P\u0159\u00edrodn\u00ed alternativy k retinoid\u016fm<\/span><\/h2>\n<p><span>Pro ty, kte\u0159\u00ed necht\u011bj\u00ed vystavit svoji poko\u017eku po\u0161kozen\u00ed zp\u016fsoben\u00e9mu retinoidy, existuj\u00ed bezpe\u010dn\u011bj\u0161\u00ed p\u0159\u00edrodn\u00ed alternativy, kter\u00e9 byste m\u011bli hledat:<\/span><\/p>\n<p><strong><span>1. Bakuchiol<\/span><\/strong><\/p>\n<p><span>Bakuchiol je rostlinn\u00e1 alternativa retinolu, kter\u00e1 napodobuje jeho \u00fa\u010dinky, ale bez podr\u00e1\u017ed\u011bn\u00ed nebo toxicity. Studie ukazuj\u00ed, \u017ee zvy\u0161uje produkci kolagenu, ani\u017e by zp\u016fsoboval vedlej\u0161\u00ed \u00fa\u010dinky.<\/span><\/p>\n<p><strong><span>2. Niacinamid (vitamin B3)<\/span><\/strong><\/p>\n<p><span>Niacinamid sni\u017euje z\u00e1n\u011bty, zlep\u0161uje funkci ko\u017en\u00ed bari\u00e9ry a redukuje hyperpigmentaci, ani\u017e by zp\u016fsoboval zv\u00fd\u0161enou citlivost poko\u017eky.<\/span><\/p>\n<p><strong><span>3. Peptidy<\/span><\/strong><\/p>\n<p><span>Peptidy p\u0159irozen\u011b stimuluj\u00ed tvorbu kolagenu a nab\u00edzej\u00ed omlazuj\u00edc\u00ed \u00fa\u010dinky, ani\u017e by zp\u016fsobovaly naru\u0161en\u00ed bun\u011bk.<\/span><\/p>\n<p><strong><span>4. Antioxidanty (vitam\u00edny C, E a kyselina ferulov\u00e1)<\/span><\/strong><\/p>\n<p><span>Antioxidanty jako vitam\u00edny C, E a kyselina ferulov\u00e1 pom\u00e1haj\u00ed chr\u00e1nit p\u0159ed voln\u00fdmi radik\u00e1ly a podporuj\u00ed obnovu poko\u017eky.<\/span><\/p>\n<p><span>Tyto alternativy mohou sice fungovat pomaleji ne\u017e retinoidy, ale nemaj\u00ed jejich alarmuj\u00edc\u00ed vedlej\u0161\u00ed \u00fa\u010dinky.<\/span><\/p>\n<h2><span>Jak se detoxikovat od retinoid\u016f<\/span><\/h2>\n<p><span>Kdy\u017e se retinoidy dostanou do va\u0161eho t\u011bla, mohou v n\u011bm p\u0159etrv\u00e1vat pom\u011brn\u011b dlouhou dobu. Neexistuje \u017e\u00e1dn\u00e1 rychl\u00e1 \u201edetoxikace\u201c, av\u0161ak p\u0159eru\u0161en\u00ed jejich u\u017e\u00edv\u00e1n\u00ed umo\u017en\u00ed va\u0161\u00ed poko\u017ece zotavit se.<\/span><\/p>\n<p><span>Abyste si ochr\u00e1nili poko\u017eku a zdrav\u00ed, mus\u00edte:<\/span><\/p>\n<ul>\n<li><span>Okam\u017eit\u011b p\u0159estat pou\u017e\u00edvat produkty obsahuj\u00edc\u00ed retinoidy.<\/span><\/li>\n<li><span>Obnovit ko\u017en\u00ed bari\u00e9ru ceramidy, kyselinou hyaluronovou a zklid\u0148uj\u00edc\u00edmi l\u00e1tkami, jako je aloe vera.<\/span><\/li>\n<li><span>Vyh\u00fdbat se slune\u010dn\u00edmu z\u00e1\u0159en\u00ed, dokud se citlivost poko\u017eky nevr\u00e1t\u00ed k norm\u00e1lu.<\/span><\/li>\n<li><span>P\u0159ej\u00edt na produkty, kter\u00e9 pou\u017e\u00edvaj\u00ed jemn\u011bj\u0161\u00ed slo\u017eky, ne\u017e jsou ty uveden\u00e9 v\u00fd\u0161e.<\/span><\/li>\n<\/ul>\n<p><span>Va\u0161e t\u011blo nakonec retinoidy vylou\u010d\u00ed, ale po\u0161kozen\u00ed, zvl\u00e1\u0161t\u011b po dlouhodob\u00e9m u\u017e\u00edv\u00e1n\u00ed, nemus\u00ed b\u00fdt zcela zvr\u00e1titeln\u00e9.<\/span><\/p>\n<h2><span>Z\u00e1v\u011br<\/span><\/h2>\n<p><span>M\u00e1nie retinoid\u016f je d\u016fkazem posedlosti spole\u010dnosti dos\u00e1hnout bezvadn\u00e9 pleti za ka\u017edou cenu.<\/span><\/p>\n<p><span>Dermatologov\u00e9 a kosmetick\u00e9 spole\u010dnosti zleh\u010duj\u00ed rizika a vedlej\u0161\u00ed \u00fa\u010dinky ozna\u010duj\u00ed pouze za \u201ep\u0159echodn\u00e1 adapta\u010dn\u00ed obdob\u00ed\u201c. Retinoidy jsou v\u0161ak siln\u00e9 l\u00e9ky se zdokumentovanou toxicitou a maj\u00ed schopnost zp\u016fsobit trval\u00e9 po\u0161kozen\u00ed.<\/span><\/p>\n<p><span>Pokud hled\u00e1te zdrav\u011bj\u0161\u00ed ple\u0165, vyh\u00fdbejte se retinoidn\u00edm produkt\u016fm zp\u016fsobuj\u00edc\u00edm nezvratn\u00e9 po\u0161kozen\u00ed a nam\u00edsto nich si zvolte bezpe\u010dn\u011bj\u0161\u00ed a udr\u017eiteln\u011bj\u0161\u00ed p\u00e9\u010di o ple\u0165, kter\u00e1 respektuje limity va\u0161eho t\u011bla.<\/span><\/p>\n<p><span>Autor: Zoey Sky, Zdroj:\u00a0<\/span><a href=\"https:\/\/www.naturalnews.com\/2025-06-26-retinoids-toxicity-risks-illusion-of-flawless-skin.html\" target=\"_blank\" rel=\"noopener\"><span>naturalnews.com<\/span><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dermatologick\u00fd a kosmetick\u00fd pr\u016fmysl ji\u017e dlouho slav\u00ed retinoidy, syntetick\u00e9 deriv\u00e1ty vitam\u00ednu A, jako z\u00e1zra\u010dn\u00e9 prost\u0159edky&#8230;<\/p>\n","protected":false},"author":2,"featured_media":82540,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[9407,8249,9408,9406],"_links":{"self":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/82539"}],"collection":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/comments?post=82539"}],"version-history":[{"count":0,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/82539\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media\/82540"}],"wp:attachment":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media?parent=82539"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/categories?post=82539"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/tags?post=82539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}