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class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Projekt"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Obsah" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Obsah</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">přesunout do postranního panelu</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">skrýt</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(úvod)</div> </a> </li> <li id="toc-Riboflavin_v_potravě" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Riboflavin_v_potravě"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Riboflavin v potravě</span> </div> </a> <button aria-controls="toc-Riboflavin_v_potravě-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Přepnout podsekci Riboflavin v potravě</span> </button> <ul id="toc-Riboflavin_v_potravě-sublist" class="vector-toc-list"> <li id="toc-Vegetariánská_a_veganská_výživa" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Vegetariánská_a_veganská_výživa"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Vegetariánská a veganská výživa</span> </div> </a> <ul id="toc-Vegetariánská_a_veganská_výživa-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Zvýšená_potřeba_vitamínu_B2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Zvýšená_potřeba_vitamínu_B2"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Zvýšená potřeba vitamínu B<sub>2</sub></span> </div> </a> <ul id="toc-Zvýšená_potřeba_vitamínu_B2-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Role_riboflavinu_v_organismu" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Role_riboflavinu_v_organismu"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Role riboflavinu v organismu</span> </div> </a> <button aria-controls="toc-Role_riboflavinu_v_organismu-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Přepnout podsekci Role riboflavinu v organismu</span> </button> <ul id="toc-Role_riboflavinu_v_organismu-sublist" class="vector-toc-list"> <li id="toc-Projevy_nedostatku" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Projevy_nedostatku"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Projevy nedostatku</span> </div> </a> <ul id="toc-Projevy_nedostatku-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Předávkování_vitamínem_B2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Předávkování_vitamínem_B2"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Předávkování vitamínem B<sub>2</sub></span> </div> </a> <ul id="toc-Předávkování_vitamínem_B2-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Externí_odkazy" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Externí_odkazy"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Externí odkazy</span> </div> </a> <ul id="toc-Externí_odkazy-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Obsah" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Přepnout obsah" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Přepnout obsah</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Vitamín B2</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Přejděte k článku v jiném jazyce. Je dostupný v 75 jazycích" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-75" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">75 jazyků</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Riboflavien" title="Riboflavien – afrikánština" lang="af" hreflang="af" data-title="Riboflavien" data-language-autonym="Afrikaans" data-language-local-name="afrikánština" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%81%D9%8A%D8%AA%D8%A7%D9%85%D9%8A%D9%86_%D8%A82" title="فيتامين ب2 – arabština" lang="ar" hreflang="ar" data-title="فيتامين ب2" data-language-autonym="العربية" data-language-local-name="arabština" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Vitamina_B2" title="Vitamina B2 – asturština" lang="ast" hreflang="ast" data-title="Vitamina B2" data-language-autonym="Asturianu" data-language-local-name="asturština" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A0%D1%8B%D0%B1%D0%B0%D1%84%D0%BB%D0%B0%D0%B2%D1%96%D0%BD" title="Рыбафлавін – běloruština" lang="be" hreflang="be" data-title="Рыбафлавін" data-language-autonym="Беларуская" data-language-local-name="běloruština" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A0%D1%8B%D0%B1%D0%B0%D1%84%D0%BB%D1%8F%D0%B2%D1%96%D0%BD" title="Рыбафлявін – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Рыбафлявін" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%92%D0%B8%D1%82%D0%B0%D0%BC%D0%B8%D0%BD_B2" title="Витамин B2 – bulharština" lang="bg" hreflang="bg" data-title="Витамин B2" data-language-autonym="Български" data-language-local-name="bulharština" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B0%E0%A6%BF%E0%A6%AC%E0%A7%8B%E0%A6%AB%E0%A7%8D%E0%A6%B2%E0%A6%BE%E0%A6%AD%E0%A6%BF%E0%A6%A8" title="রিবোফ্লাভিন – bengálština" lang="bn" hreflang="bn" data-title="রিবোফ্লাভিন" data-language-autonym="বাংলা" data-language-local-name="bengálština" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Vitamin_B2" title="Vitamin B2 – bosenština" lang="bs" hreflang="bs" data-title="Vitamin B2" data-language-autonym="Bosanski" data-language-local-name="bosenština" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Riboflavina" title="Riboflavina – katalánština" lang="ca" hreflang="ca" data-title="Riboflavina" data-language-autonym="Català" data-language-local-name="katalánština" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%A4%DB%8C%D8%AA%D8%A7%D9%85%DB%8C%D9%86_%D8%A8%DB%8C_%D9%A2" title="ڤیتامین بی ٢ – kurdština (sorání)" lang="ckb" hreflang="ckb" data-title="ڤیتامین بی ٢" data-language-autonym="کوردی" data-language-local-name="kurdština (sorání)" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Ribofflafin" title="Ribofflafin – velština" lang="cy" hreflang="cy" data-title="Ribofflafin" data-language-autonym="Cymraeg" data-language-local-name="velština" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Riboflavin" title="Riboflavin – dánština" lang="da" hreflang="da" data-title="Riboflavin" data-language-autonym="Dansk" data-language-local-name="dánština" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Riboflavin" title="Riboflavin – němčina" lang="de" hreflang="de" data-title="Riboflavin" data-language-autonym="Deutsch" data-language-local-name="němčina" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-dv mw-list-item"><a href="https://dv.wikipedia.org/wiki/%DE%88%DE%A8%DE%93%DE%A6%DE%89%DE%A8%DE%82%DE%B0_%DE%84%DE%A92" title="ވިޓަމިން ބީ2 – maledivština" lang="dv" hreflang="dv" data-title="ވިޓަމިން ބީ2" data-language-autonym="ދިވެހިބަސް" data-language-local-name="maledivština" class="interlanguage-link-target"><span>ދިވެހިބަސް</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A1%CE%B9%CE%B2%CE%BF%CF%86%CE%BB%CE%B1%CE%B2%CE%AF%CE%BD%CE%B7" title="Ριβοφλαβίνη – řečtina" lang="el" hreflang="el" data-title="Ριβοφλαβίνη" data-language-autonym="Ελληνικά" data-language-local-name="řečtina" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437798 badge-goodarticle mw-list-item" title="dobrý článek"><a href="https://en.wikipedia.org/wiki/Riboflavin" title="Riboflavin – angličtina" lang="en" hreflang="en" data-title="Riboflavin" data-language-autonym="English" data-language-local-name="angličtina" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Riboflavino" title="Riboflavino – esperanto" lang="eo" hreflang="eo" data-title="Riboflavino" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Vitamina_B2" title="Vitamina B2 – španělština" lang="es" hreflang="es" data-title="Vitamina B2" data-language-autonym="Español" data-language-local-name="španělština" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/B2-vitamiin" title="B2-vitamiin – estonština" lang="et" hreflang="et" data-title="B2-vitamiin" data-language-autonym="Eesti" data-language-local-name="estonština" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/B2_bitamina" title="B2 bitamina – baskičtina" lang="eu" hreflang="eu" data-title="B2 bitamina" data-language-autonym="Euskara" data-language-local-name="baskičtina" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%88%DB%8C%D8%AA%D8%A7%D9%85%DB%8C%D9%86_%D8%A8%DB%B2" title="ویتامین ب۲ – perština" lang="fa" hreflang="fa" data-title="ویتامین ب۲" data-language-autonym="فارسی" data-language-local-name="perština" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Riboflaviini" title="Riboflaviini – finština" lang="fi" hreflang="fi" data-title="Riboflaviini" data-language-autonym="Suomi" data-language-local-name="finština" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/Riboflavin" title="Riboflavin – faerština" lang="fo" hreflang="fo" data-title="Riboflavin" data-language-autonym="Føroyskt" data-language-local-name="faerština" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Riboflavine" title="Riboflavine – francouzština" lang="fr" hreflang="fr" data-title="Riboflavine" data-language-autonym="Français" data-language-local-name="francouzština" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Ribeaflaivin" title="Ribeaflaivin – irština" lang="ga" hreflang="ga" data-title="Ribeaflaivin" data-language-autonym="Gaeilge" data-language-local-name="irština" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Vitamina_B2" title="Vitamina B2 – galicijština" lang="gl" hreflang="gl" data-title="Vitamina B2" data-language-autonym="Galego" data-language-local-name="galicijština" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%95%D7%99%D7%98%D7%9E%D7%99%D7%9F_B2" title="ויטמין B2 – hebrejština" lang="he" hreflang="he" data-title="ויטמין B2" data-language-autonym="עברית" data-language-local-name="hebrejština" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B0%E0%A4%BF%E0%A4%AC%E0%A5%8B%E0%A4%AB%E0%A5%8D%E0%A4%B2%E0%A5%87%E0%A4%B5%E0%A4%BF%E0%A4%A8" title="रिबोफ्लेविन – hindština" lang="hi" hreflang="hi" data-title="रिबोफ्लेविन" data-language-autonym="हिन्दी" data-language-local-name="hindština" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Vitamin_B2" title="Vitamin B2 – chorvatština" lang="hr" hreflang="hr" data-title="Vitamin B2" data-language-autonym="Hrvatski" data-language-local-name="chorvatština" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Riboflavin" title="Riboflavin – maďarština" lang="hu" hreflang="hu" data-title="Riboflavin" data-language-autonym="Magyar" data-language-local-name="maďarština" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8E%D5%AB%D5%BF%D5%A1%D5%B4%D5%AB%D5%B6_B2" title="Վիտամին B2 – arménština" lang="hy" hreflang="hy" data-title="Վիտամին B2" data-language-autonym="Հայերեն" data-language-local-name="arménština" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Riboflavin" title="Riboflavin – indonéština" lang="id" hreflang="id" data-title="Riboflavin" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonéština" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Riboflavino" title="Riboflavino – ido" lang="io" hreflang="io" data-title="Riboflavino" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Riboflavina" title="Riboflavina – italština" lang="it" hreflang="it" data-title="Riboflavina" data-language-autonym="Italiano" data-language-local-name="italština" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%AA%E3%83%9C%E3%83%95%E3%83%A9%E3%83%93%E3%83%B3" title="リボフラビン – japonština" lang="ja" hreflang="ja" data-title="リボフラビン" data-language-autonym="日本語" data-language-local-name="japonština" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A0%D0%B8%D0%B1%D0%BE%D1%84%D0%BB%D0%B0%D0%B2%D0%B8%D0%BD" title="Рибофлавин – kazaština" lang="kk" hreflang="kk" data-title="Рибофлавин" data-language-autonym="Қазақша" data-language-local-name="kazaština" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%A6%AC%EB%B3%B4%ED%94%8C%EB%9D%BC%EB%B9%88" title="리보플라빈 – korejština" lang="ko" hreflang="ko" data-title="리보플라빈" data-language-autonym="한국어" data-language-local-name="korejština" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A0%D0%B8%D0%B1%D0%BE%D1%84%D0%BB%D0%B0%D0%B2%D0%B8%D0%BD" title="Рибофлавин – kyrgyzština" lang="ky" hreflang="ky" data-title="Рибофлавин" data-language-autonym="Кыргызча" data-language-local-name="kyrgyzština" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Riboflavin" title="Riboflavin – lucemburština" lang="lb" hreflang="lb" data-title="Riboflavin" data-language-autonym="Lëtzebuergesch" data-language-local-name="lucemburština" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Riboflavinas" title="Riboflavinas – litevština" lang="lt" hreflang="lt" data-title="Riboflavinas" data-language-autonym="Lietuvių" data-language-local-name="litevština" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/B2_vitam%C4%ABns" title="B2 vitamīns – lotyština" lang="lv" hreflang="lv" data-title="B2 vitamīns" data-language-autonym="Latviešu" data-language-local-name="lotyština" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A0%D0%B8%D0%B1%D0%BE%D1%84%D0%BB%D0%B0%D0%B2%D0%B8%D0%BD" title="Рибофлавин – makedonština" lang="mk" hreflang="mk" data-title="Рибофлавин" data-language-autonym="Македонски" data-language-local-name="makedonština" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B1%E0%B5%88%E0%B4%AC%E0%B5%8B%E0%B4%AB%E0%B5%8D%E0%B4%B2%E0%B5%87%E0%B4%B5%E0%B4%BF%E0%B5%BB" title="റൈബോഫ്ലേവിൻ – malajálamština" lang="ml" hreflang="ml" data-title="റൈബോഫ്ലേവിൻ" data-language-autonym="മലയാളം" data-language-local-name="malajálamština" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Vitamin_B2" title="Vitamin B2 – malajština" lang="ms" hreflang="ms" data-title="Vitamin B2" data-language-autonym="Bahasa Melayu" data-language-local-name="malajština" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Riboflavine" title="Riboflavine – nizozemština" lang="nl" hreflang="nl" data-title="Riboflavine" data-language-autonym="Nederlands" data-language-local-name="nizozemština" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Riboflavin" title="Riboflavin – norština (bokmål)" lang="nb" hreflang="nb" data-title="Riboflavin" data-language-autonym="Norsk bokmål" data-language-local-name="norština (bokmål)" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Vitamina_B2" title="Vitamina B2 – okcitánština" lang="oc" hreflang="oc" data-title="Vitamina B2" data-language-autonym="Occitan" data-language-local-name="okcitánština" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%B0%E0%AC%BE%E0%AC%87%E0%AC%AC%E0%AD%8B%E0%AC%AB%E0%AD%8D%E0%AC%B2%E0%AC%BE%E0%AC%AD%E0%AC%BF%E0%AC%A8" title="ରାଇବୋଫ୍ଲାଭିନ – urijština" lang="or" hreflang="or" data-title="ରାଇବୋଫ୍ଲାଭିନ" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="urijština" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Witamina_B2" title="Witamina B2 – polština" lang="pl" hreflang="pl" data-title="Witamina B2" data-language-autonym="Polski" data-language-local-name="polština" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Riboflavina" title="Riboflavina – portugalština" lang="pt" hreflang="pt" data-title="Riboflavina" data-language-autonym="Português" data-language-local-name="portugalština" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Riboflavin%C4%83" title="Riboflavină – rumunština" lang="ro" hreflang="ro" data-title="Riboflavină" data-language-autonym="Română" data-language-local-name="rumunština" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A0%D0%B8%D0%B1%D0%BE%D1%84%D0%BB%D0%B0%D0%B2%D0%B8%D0%BD" title="Рибофлавин – ruština" lang="ru" hreflang="ru" data-title="Рибофлавин" data-language-autonym="Русский" data-language-local-name="ruština" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-rw mw-list-item"><a href="https://rw.wikipedia.org/wiki/Vitamini_B2" title="Vitamini B2 – kiňarwandština" lang="rw" hreflang="rw" data-title="Vitamini B2" data-language-autonym="Ikinyarwanda" data-language-local-name="kiňarwandština" class="interlanguage-link-target"><span>Ikinyarwanda</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%A0%D0%B8%D0%B1%D0%BE%D1%84%D0%BB%D0%B0%D0%B2%D0%B8%D0%BD_%D0%922" title="Рибофлавин В2 – jakutština" lang="sah" hreflang="sah" data-title="Рибофлавин В2" data-language-autonym="Саха тыла" data-language-local-name="jakutština" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Riboflavin" title="Riboflavin – skotština" lang="sco" hreflang="sco" data-title="Riboflavin" data-language-autonym="Scots" data-language-local-name="skotština" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Vitamin_B2" title="Vitamin B2 – srbochorvatština" lang="sh" hreflang="sh" data-title="Vitamin B2" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="srbochorvatština" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Riboflavin" title="Riboflavin – Simple English" lang="en-simple" hreflang="en-simple" data-title="Riboflavin" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Riboflav%C3%ADn" title="Riboflavín – slovenština" lang="sk" hreflang="sk" data-title="Riboflavín" data-language-autonym="Slovenčina" data-language-local-name="slovenština" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Riboflavin" title="Riboflavin – slovinština" lang="sl" hreflang="sl" data-title="Riboflavin" data-language-autonym="Slovenščina" data-language-local-name="slovinština" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Vitamina_B2" title="Vitamina B2 – albánština" lang="sq" hreflang="sq" data-title="Vitamina B2" data-language-autonym="Shqip" data-language-local-name="albánština" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%92%D0%B8%D1%82%D0%B0%D0%BC%D0%B8%D0%BD_%D0%912" title="Витамин Б2 – srbština" lang="sr" hreflang="sr" data-title="Витамин Б2" data-language-autonym="Српски / srpski" data-language-local-name="srbština" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Riboflavin" title="Riboflavin – sundština" lang="su" hreflang="su" data-title="Riboflavin" data-language-autonym="Sunda" data-language-local-name="sundština" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Riboflavin" title="Riboflavin – švédština" lang="sv" hreflang="sv" data-title="Riboflavin" data-language-autonym="Svenska" data-language-local-name="švédština" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%B0%E0%AE%BF%E0%AE%AA%E0%AF%8B%E0%AE%83%E0%AE%AA%E0%AE%BF%E0%AE%B3%E0%AE%BE%E0%AE%B5%E0%AE%BF%E0%AE%A9%E0%AF%8D" title="ரிபோஃபிளாவின் – tamilština" lang="ta" hreflang="ta" data-title="ரிபோஃபிளாவின்" data-language-autonym="தமிழ்" data-language-local-name="tamilština" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%A0%D0%B8%D0%B1%D0%BE%D1%84%D0%BB%D0%B0%D0%B2%D0%B8%D0%BD" title="Рибофлавин – tádžičtina" lang="tg" hreflang="tg" data-title="Рибофлавин" data-language-autonym="Тоҷикӣ" data-language-local-name="tádžičtina" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%84%E0%B8%A3%E0%B9%82%E0%B8%9A%E0%B9%80%E0%B8%9F%E0%B8%A5%E0%B8%A7%E0%B8%B4%E0%B8%99" title="ไรโบเฟลวิน – thajština" lang="th" hreflang="th" data-title="ไรโบเฟลวิน" data-language-autonym="ไทย" data-language-local-name="thajština" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Riboflavin" title="Riboflavin – turečtina" lang="tr" hreflang="tr" data-title="Riboflavin" data-language-autonym="Türkçe" data-language-local-name="turečtina" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tyv mw-list-item"><a href="https://tyv.wikipedia.org/wiki/%D0%92%D0%B8%D1%82%D0%B0%D0%BC%D0%B8%D0%BD_%D0%922" title="Витамин В2 – tuvinština" lang="tyv" hreflang="tyv" data-title="Витамин В2" data-language-autonym="Тыва дыл" data-language-local-name="tuvinština" class="interlanguage-link-target"><span>Тыва дыл</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A0%D0%B8%D0%B1%D0%BE%D1%84%D0%BB%D0%B0%D0%B2%D1%96%D0%BD" title="Рибофлавін – ukrajinština" lang="uk" hreflang="uk" data-title="Рибофлавін" data-language-autonym="Українська" data-language-local-name="ukrajinština" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Riboflavin" title="Riboflavin – uzbečtina" lang="uz" hreflang="uz" data-title="Riboflavin" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbečtina" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Riboflavin" title="Riboflavin – vietnamština" lang="vi" hreflang="vi" data-title="Riboflavin" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamština" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/Riboflavene" title="Riboflavene – valonština" lang="wa" hreflang="wa" data-title="Riboflavene" data-language-autonym="Walon" data-language-local-name="valonština" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E6%A0%B8%E9%BB%84%E7%B4%A0" title="核黄素 – čínština (dialekty Wu)" lang="wuu" hreflang="wuu" data-title="核黄素" data-language-autonym="吴语" data-language-local-name="čínština (dialekty Wu)" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%A0%B8%E9%BB%84%E7%B4%A0" title="核黄素 – čínština" lang="zh" hreflang="zh" data-title="核黄素" data-language-autonym="中文" data-language-local-name="čínština" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a 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id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cs" dir="ltr"><table class="infobox" style="width:22em;width:300px;"><tbody><tr><th colspan="2" style="text-align:center;font-size:125%;font-weight:bold;background-color: #ddddff;">Riboflavin</th></tr><tr><td colspan="2" style="text-align:center"><span typeof="mw:File"><a href="/wiki/Soubor:Riboflavin.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/36/Riboflavin.svg/280px-Riboflavin.svg.png" decoding="async" width="280" height="274" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/36/Riboflavin.svg/420px-Riboflavin.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/36/Riboflavin.svg/560px-Riboflavin.svg.png 2x" data-file-width="440" data-file-height="430" /></a></span></td></tr><tr><th colspan="2" style="text-align:center;background-color: #ddddff;">Obecné</th></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Systematick%C3%BD_n%C3%A1zev" title="Systematický název">Systematický název</a></th><td><span style="display:inline-block; word-break:break-all; max-width:300px">7,8-Dimethyl-10-[(2<i>S</i>,3<i>S</i>,4<i>R</i>)-2,3,4,5-tetrahydroxypentyl]benzo[<i>g</i>]pteridin-2,4-dion</span></td></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Trivi%C3%A1ln%C3%AD_n%C3%A1zev" title="Triviální název">Triviální název</a></th><td>Riboflavin, vitamín B<sub>2</sub>, vitamín G, ovoflavin, laktoflavin, hepatoflavin, verdoflavin, uroflavin, 6,7-dimethyl-9-(1-D-ribityl)isoalloxazin</td></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Chemick%C3%BD_vzorec#Sumární_vzorec" title="Chemický vzorec">Sumární vzorec</a></th><td>C<sub>17</sub>H<sub>20</sub>N<sub>4</sub>O<sub>6</sub></td></tr><tr><th colspan="2" style="text-align:center;background-color: #ddddff;">Identifikace</th></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Registra%C4%8Dn%C3%AD_%C4%8D%C3%ADslo_CAS" title="Registrační číslo CAS">Registrační číslo CAS</a></th><td><a rel="nofollow" class="external text" href="http://webbook.nist.gov/cgi/cbook.cgi?Name=83-88-5&Units=SI">83-88-5</a></td></tr><tr><th colspan="2" style="text-align:center;background-color: #ddddff;">Vlastnosti</th></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Mol%C3%A1rn%C3%AD_hmotnost" title="Molární hmotnost">Molární hmotnost</a></th><td>376,367 g/mol</td></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Teplota_t%C3%A1n%C3%AD" title="Teplota tání">Teplota tání</a></th><td>278–282 °C</td></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Teplota_varu" title="Teplota varu">Teplota varu</a></th><td>rozklad</td></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Disocia%C4%8Dn%C3%AD_konstanta" title="Disociační konstanta">Disociační konstanta</a> p<i>K</i><sub>a</sub></th><td>10,2</td></tr><tr><th scope="row" style="text-align:left"><a href="/wiki/Rozpustnost" title="Rozpustnost">Rozpustnost</a> ve <a href="/wiki/Voda" title="Voda">vodě</a></th><td>8,47 mg/100 ml</td></tr><tr><td colspan="2" style="text-align:center;background-color: #ddddff;"><div style="font-weight: bold">Není-li uvedeno jinak, jsou použity<br />jednotky <a href="/wiki/Soustava_SI" title="Soustava SI">SI</a> a <a href="/wiki/Standardn%C3%AD_teplota_a_tlak" title="Standardní teplota a tlak">STP</a> (25 °C, 100 kPa).</div><hr /><div style="font-size: smaller">Některá data mohou pocházet z <a href="https://www.wikidata.org/wiki/Q130365" class="extiw" title="d:Q130365">datové položky</a>.</div></td></tr></tbody></table> <p><b>Riboflavin</b> (<b>vitamín B<sub>2</sub></b>, <b>vitamín G</b>, <b>ovoflavin</b>, <b>laktoflavin</b>) je žluté až oranžově žluté přírodní barvivo slabě rozpustné ve vodě. Patří mezi <a href="/wiki/Flavin" title="Flavin">flaviny</a>. <a href="/wiki/Luminiscence" title="Luminiscence">Fluoreskuje</a>, je odolný vůči vysokým teplotám, ale rozkládá se působením světla. </p><p>Strukturu riboflavinu tvoří <a href="/wiki/Heterocyklick%C3%A9_slou%C4%8Deniny" title="Heterocyklické sloučeniny">heterocyklické</a> <a href="/wiki/Isoalloxazin" title="Isoalloxazin">isoalloxazinové</a> jádro a <a href="/wiki/Cukern%C3%BD_alkohol" class="mw-redirect" title="Cukerný alkohol">cukerný alkohol</a> <a href="/wiki/Ribitol" title="Ribitol">ribitol</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Riboflavin_v_potravě"><span id="Riboflavin_v_potrav.C4.9B"></span>Riboflavin v potravě</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vitam%C3%ADn_B2&veaction=edit&section=1" title="Editace sekce: Riboflavin v potravě" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vitam%C3%ADn_B2&action=edit&section=1" title="Editovat zdrojový kód sekce Riboflavin v potravě"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Rostliny a mikroorganismy dokážou syntetizovat riboflavin; živočichové, tedy i člověk, ho ale musí přijímat v potravě. Vitamin B<sub>2</sub> je rozpustný ve vodě, v těle se neukládá, je jej proto nutno stále doplňovat. </p><p>Dobrým zdrojem vitamínu B<sub>2</sub> jsou <a href="/wiki/Kvasinky#Význam_a_využití" title="Kvasinky">kvasnice</a>, <a href="/wiki/J%C3%A1tra" title="Játra">játra</a> a <a href="/wiki/Ledvina" title="Ledvina">ledviny</a>. Dále je obsažen i v <a href="/wiki/Ml%C3%A9ko" title="Mléko">mléce</a>, ve <a href="/wiki/Vejce" title="Vejce">vejcích</a>, ve vepřovém a hovězím <a href="/wiki/Maso" title="Maso">masu</a>, v rybách, v <a href="/wiki/Tvaroh" title="Tvaroh">tvarohu</a>, v <a href="/wiki/Kakao" title="Kakao">kakau</a> a v <a href="/wiki/O%C5%99ech" class="mw-disambig" title="Ořech">ořeších</a>. </p><p>V potravinářství se značí kódem <a href="/wiki/P%C5%99%C3%ADdatn%C3%A9_l%C3%A1tky" class="mw-redirect" title="Přídatné látky">E 101</a>. </p> <dl><dt>Doporučená denní dávka</dt></dl> <table class="wikitable"> <tbody><tr> <th> </th> <th>věk (roky) </th> <th>riboflavin [mg] </th></tr> <tr> <td rowspan="2">Kojenci </td> <td align="center">0,0–0,5 </td> <td align="center">0,4 </td></tr> <tr> <td align="center">0,5–1,0 </td> <td align="center">0,5 </td></tr> <tr> <td rowspan="3">Děti </td> <td align="center">1–3 </td> <td align="center">0,8 </td></tr> <tr> <td align="center">4–6 </td> <td align="center">1,1 </td></tr> <tr> <td align="center">7–10 </td> <td align="center">1,2 </td></tr> <tr> <td rowspan="5">Muži </td> <td align="center">11–14 </td> <td align="center">1,5 </td></tr> <tr> <td align="center">15–18 </td> <td align="center">1,8 </td></tr> <tr> <td align="center">19–24 </td> <td align="center">1,7 </td></tr> <tr> <td align="center">25–50 </td> <td align="center">1,7 </td></tr> <tr> <td align="center">51+ </td> <td align="center">1,4 </td></tr> <tr> <td rowspan="5">Ženy </td> <td align="center">11–14 </td> <td align="center">1,3 </td></tr> <tr> <td align="center">15–18 </td> <td align="center">1,3 </td></tr> <tr> <td align="center">19–24 </td> <td align="center">1,3 </td></tr> <tr> <td align="center">25–50 </td> <td align="center">1,3 </td></tr> <tr> <td align="center">50+ </td> <td align="center">1,2 </td></tr> <tr> <td>Těhotné ženy </td> <td> </td> <td align="center">1,6 </td></tr> <tr> <td>Kojící ženy </td> <td> </td> <td align="center">1,8 </td></tr> </tbody></table> <p><i>Údaje z Recommended Dietary Allowances, 10th Edition. Food and Nutrition Board, National Research Ccouncil–National Academy of Sciences, 1989</i> </p> <div class="mw-heading mw-heading3"><h3 id="Vegetariánská_a_veganská_výživa"><span id="Vegetari.C3.A1nsk.C3.A1_a_vegansk.C3.A1_v.C3.BD.C5.BEiva"></span>Vegetariánská a veganská výživa</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vitam%C3%ADn_B2&veaction=edit&section=2" title="Editace sekce: Vegetariánská a veganská výživa" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vitam%C3%ADn_B2&action=edit&section=2" title="Editovat zdrojový kód sekce Vegetariánská a veganská výživa"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Jak je vidět z výčtu potravin, které obsahují vitamín B<sub>2</sub>, většina jich je živočišného původu. V trávicí soustavě býložravců, v bachoru přežvýkavců a v tlustém střevě ostatních býložravých živočichů žije symbiotická mikroflóra, mikroskopické houby, prvoci a bakterie, které jsou schopné tento vitamín syntetizovat v  množství dostatečném pro potřeby organismu býložravce. </p><p>Lidské střevo podobná mikroflóra neosidluje. Vegetariáni a vegani by proto měli věnovat pozornost tomu, aby si zajistili dostatečný příjem tohoto vitamínu (v ořeších, kakau apod., příp. v tabletách). </p> <div class="mw-heading mw-heading3"><h3 id="Zvýšená_potřeba_vitamínu_B2"><span id="Zv.C3.BD.C5.A1en.C3.A1_pot.C5.99eba_vitam.C3.ADnu_B2"></span>Zvýšená potřeba vitamínu B<sub>2</sub></h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vitam%C3%ADn_B2&veaction=edit&section=3" title="Editace sekce: Zvýšená potřeba vitamínu B2" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vitam%C3%ADn_B2&action=edit&section=3" title="Editovat zdrojový kód sekce Zvýšená potřeba vitamínu B2"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Zvýšenou potřebu vitamínu B<sub>2</sub> mají lidé, kteří jsou léčeni <a href="/wiki/Antibiotikum" title="Antibiotikum">antibiotiky</a>, lidé trpící onemocněním <a href="/wiki/%C5%A0t%C3%ADtn%C3%A1_%C5%BEl%C3%A1za" title="Štítná žláza">štítné žlázy</a>, <a href="/wiki/Celiakie" title="Celiakie">celiakií</a>, <a href="/wiki/Jatern%C3%AD_cirh%C3%B3za" title="Jaterní cirhóza">cirhózou jater</a> nebo <a href="/wiki/Diabetes_mellitus" title="Diabetes mellitus">cukrovkou</a>. Ženy, které užívají orální antikoncepci a osoby, které nepijí mléko, jsou také ohroženy nedostatkem riboflavinu. Protože se riboflavin rozkládá světlem, novorozenci s kojeneckou žloutenkou, kteří jsou léčeni fototerapií, mohou také trpět nedostatkem vitaminu B<sub>2</sub>. </p> <div class="mw-heading mw-heading2"><h2 id="Role_riboflavinu_v_organismu">Role riboflavinu v organismu</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vitam%C3%ADn_B2&veaction=edit&section=4" title="Editace sekce: Role riboflavinu v organismu" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vitam%C3%ADn_B2&action=edit&section=4" title="Editovat zdrojový kód sekce Role riboflavinu v organismu"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Riboflavin je důležitý pro dobrý stav <a href="/wiki/K%C5%AF%C5%BEe" title="Kůže">kůže</a>, <a href="/wiki/Oko" title="Oko">očí</a>, funkce <a href="/wiki/Srdce" title="Srdce">srdce</a> a dalších orgánů. Jelikož má významný vliv na metabolismus <a href="/wiki/Sacharidy" title="Sacharidy">cukrů</a>, <a href="/wiki/Tuky" title="Tuky">tuků</a> a <a href="/wiki/Aminokyselina" title="Aminokyselina">aminokyselin</a>, ovlivňuje celkovou energetickou přeměnu v organismu. Jako součást <a href="/wiki/Enzym" title="Enzym">enzymů</a> v dýchacím řetězci je nezbytný pro základní buněčný <a href="/wiki/Metabolismus" title="Metabolismus">metabolismus</a>. </p><p>Aktivní forma riboflavinu je <a href="/wiki/Flavinmononukleotid" title="Flavinmononukleotid">flavinmononukleotid</a> (FMN) a <a href="/wiki/Flavinadenindinukleotid" title="Flavinadenindinukleotid">flavinadenindinukleotid</a> (FAD). Přeměna je ovlivňována hormony štítné žlázy a některými léčivy. </p><p>FMN a FAD jsou prostetické skupiny mnoha oxidoredukčních enzymů, <a href="/wiki/Flavoprotein" title="Flavoprotein">flavoproteinů</a>, jako je například: </p> <ul><li><i><a href="/w/index.php?title=Oxid%C3%A1za_%CE%B1-aminokyselin&action=edit&redlink=1" class="new" title="Oxidáza α-aminokyselin (stránka neexistuje)">oxidáza α-aminokyselin</a></i> – nutná k <a href="/wiki/Deaminace" title="Deaminace">deaminaci</a> aminokyselin</li> <li><i><a href="/w/index.php?title=Xanthoxid%C3%A1za&action=edit&redlink=1" class="new" title="Xanthoxidáza (stránka neexistuje)">xanthoxidáza</a></i> – nutná k odbourávání <a href="/wiki/Purin" title="Purin">purinů</a></li> <li><i><a href="/wiki/Aldehyddehydrogen%C3%A1za" title="Aldehyddehydrogenáza">aldehyddehydrogenáza</a></i> – k rozkladu <a href="/wiki/Aldehydy" title="Aldehydy">aldehydů</a></li> <li><i><a href="/w/index.php?title=Mitochondri%C3%A1ln%C3%AD_glycerol-3-fosf%C3%A1tdehydrogen%C3%A1za&action=edit&redlink=1" class="new" title="Mitochondriální glycerol-3-fosfátdehydrogenáza (stránka neexistuje)">mitochondriální glycerol-3-fosfátdehydrogenáza</a></i> – transport redukujících jednotek z cytosolu do mitochondrií</li> <li><i><a href="/wiki/Sukcin%C3%A1tdehydrogen%C3%A1za" title="Sukcinátdehydrogenáza">sukcinátdehydrogenáza</a></i> – enzym <a href="/wiki/Citr%C3%A1tov%C3%BD_cyklus" title="Citrátový cyklus">cyklu kyseliny citrónové</a> při metabolismu acyl-CoA</li> <li><i><a href="/w/index.php?title=Acylkoenzym_A-dehydrogen%C3%A1za&action=edit&redlink=1" class="new" title="Acylkoenzym A-dehydrogenáza (stránka neexistuje)">acylkoenzym A-dehydrogenáza</a></i> – k β-oxidaci <a href="/wiki/Mastn%C3%A1_kyselina" title="Mastná kyselina">mastných kyselin</a></li> <li><i><a href="/w/index.php?title=Dihydrolipoyldehydrogen%C3%A1za&action=edit&redlink=1" class="new" title="Dihydrolipoyldehydrogenáza (stránka neexistuje)">dihydrolipoyldehydrogenáza</a></i> – dekarboxylace pyruvátu a α-ketoglutarátu</li> <li><i><a href="/wiki/NADH_dehydrogen%C3%A1za" title="NADH dehydrogenáza">NADH dehydrogenáza</a></i> – součást <a href="/wiki/D%C3%BDchac%C3%AD_%C5%99et%C4%9Bzec" title="Dýchací řetězec">dýchacího řetězce</a> v mitochondriích</li></ul> <p>Flavoproteiny mohou působit i jako <a href="/wiki/Koenzym" title="Koenzym">koenzymy</a> k přenosu vodíkových atomů. Při tom vzniká redukovaná forma FMNH<sub>2</sub> a FADH<sub>2</sub> </p> <div class="mw-heading mw-heading3"><h3 id="Projevy_nedostatku">Projevy nedostatku</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vitam%C3%ADn_B2&veaction=edit&section=5" title="Editace sekce: Projevy nedostatku" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vitam%C3%ADn_B2&action=edit&section=5" title="Editovat zdrojový kód sekce Projevy nedostatku"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nedostatek riboflavinu nevede k větším potížím. Projevuje se zánětem ústních koutků (<i>cheilitis angularis</i>), zánětem <a href="/wiki/Ret" title="Ret">rtů</a> nebo <a href="/wiki/Jazyk_(org%C3%A1n)" title="Jazyk (orgán)">jazyka</a>, <a href="/wiki/Z%C3%A1n%C4%9Bt_spojivek" title="Zánět spojivek">záněty spojivek</a>, <a href="/w/index.php?title=Mazotok&action=edit&redlink=1" class="new" title="Mazotok (stránka neexistuje)">mazotokem</a> a <a href="/wiki/Sv%C4%9Btloplachost" class="mw-redirect" title="Světloplachost">světloplachostí</a>. V okolí úst je nápadná <a href="/wiki/Chudokrevnost" title="Chudokrevnost">anemická</a> bělavá zóna. V dutině ústní se konkrétně projevuje zejména ztenčením sliznice, vzhledově se nedostatek riboflavinu projeví změnou barvy <a href="/wiki/Sliznice" title="Sliznice">sliznice</a> v sytěji červenou. Jazyk je zpočátku celý zčervenalý a suchý jako <a href="/wiki/Pomeran%C4%8D" title="Pomeranč">pomerančová</a> kůra. Houbovité papily jazyka prominují (hypertrofie), ale později jich ubývá. Stejně jako u nedostatku <a href="/wiki/Thiamin" class="mw-redirect" title="Thiamin">thiaminu</a> je při dlouhotrvající karenci vyšší tendence k <a href="/wiki/Atrofie" title="Atrofie">atrofii</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Předávkování_vitamínem_B2"><span id="P.C5.99ed.C3.A1vkov.C3.A1n.C3.AD_vitam.C3.ADnem_B2"></span>Předávkování vitamínem B<sub>2</sub></h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vitam%C3%ADn_B2&veaction=edit&section=6" title="Editace sekce: Předávkování vitamínem B2" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vitam%C3%ADn_B2&action=edit&section=6" title="Editovat zdrojový kód sekce Předávkování vitamínem B2"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Vitamín B<sub>2</sub> je rozpustný ve vodě a je vylučován močí. Předávkování proto není možné. </p> <div class="mw-heading mw-heading2"><h2 id="Externí_odkazy"><span id="Extern.C3.AD_odkazy"></span>Externí odkazy</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vitam%C3%ADn_B2&veaction=edit&section=7" title="Editace sekce: Externí odkazy" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vitam%C3%ADn_B2&action=edit&section=7" title="Editovat zdrojový kód sekce Externí odkazy"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="wd"><span class="sisterproject sisterproject-commons"><span class="sisterproject_image"><span typeof="mw:File"><a href="/wiki/Wikimedia_Commons" title="Wikimedia Commons"><img alt="Logo Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span></span> <span class="sisterproject_text">Obrázky, zvuky či videa k tématu <span class="sisterproject_text_target"><a href="https://commons.wikimedia.org/wiki/Category:Riboflavin" class="extiw" title="c:Category:Riboflavin">riboflavin</a></span> na <a href="/wiki/Wikimedia_Commons" title="Wikimedia Commons">Wikimedia Commons</a></span></span></span><i> </i></li></ul> <div class="navbox noprint" title="Vitamíny"><table title="" class="navbox-navbox mw-collapsible autocollapse nowraplinks noprint" cellspacing="0" data-collapsetext="skrýt" data-expandtext="zobrazit"><style data-mw-deduplicate="TemplateStyles:r17064757">.mw-parser-output .navbox-title .mw-collapsible-toggle{font-weight:normal}</style><tbody><tr> <th class="navbox-title" colspan="2"> <span class="navbox-titletext"><a href="/wiki/Vitam%C3%ADn" title="Vitamín">Vitamíny</a></span> </th> </tr><tr class="navbox-padding"><td></td></tr> <tr> <td class="navbox-group">Rozpustné ve vodě</td> <td class="navbox-list navbox-odd"> <div> <div class="hlist"><ul><li><a href="/wiki/Vitam%C3%ADn_B1" title="Vitamín B1">B<sub>1</sub></a></li><li><a class="mw-selflink selflink">B<sub>2</sub></a></li><li><a href="/wiki/Niacin" title="Niacin">B<sub>3</sub></a></li><li><a href="/wiki/Kyselina_pantothenov%C3%A1" title="Kyselina pantothenová">B<sub>5</sub></a></li><li><a href="/wiki/Vitam%C3%ADn_B6" title="Vitamín B6">B<sub>6</sub></a></li><li><a href="/wiki/Biotin" title="Biotin">B<sub>7</sub></a> (H)</li><li><a href="/wiki/Kyselina_listov%C3%A1" title="Kyselina listová">B<sub>9</sub></a></li><li><a href="/wiki/Vitam%C3%ADn_B12" title="Vitamín B12">B<sub>12</sub></a></li><li><a href="/wiki/Vitam%C3%ADn_C" title="Vitamín C">C</a></li></ul></div></div> </td> </tr><tr class="navbox-padding"><td></td></tr> <tr> <td class="navbox-group">Rozpustné v tucích</td> <td class="navbox-list navbox-even"> <div> <div class="hlist"><ul><li><a href="/wiki/Vitam%C3%ADn_A" title="Vitamín A">A</a></li><li><a href="/wiki/Vitam%C3%ADn_D" title="Vitamín D">D</a> (<a href="/wiki/Ergokalciferol" title="Ergokalciferol">D<sub>2</sub></a> • <a href="/wiki/Cholekalciferol" title="Cholekalciferol">D<sub>3</sub></a>)</li><li><a href="/wiki/Vitam%C3%ADn_E" title="Vitamín E">E</a></li><li><a href="/wiki/Vitam%C3%ADn_K" title="Vitamín K">K</a></li><li><a href="/wiki/Vitam%C3%ADn_K2" title="Vitamín K2">K<sub>2</sub></a></li></ul></div></div> </td> </tr></tbody></table> </div> <style data-mw-deduplicate="TemplateStyles:r23078045">.mw-parser-output .navbox2{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 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class="uid"><a rel="nofollow" class="external text" href="https://d-nb.info/gnd/4188444-9">4188444-9</a></span></span></li> <li><span class="nowrap"><a href="/wiki/Library_of_Congress_Control_Number" title="Library of Congress Control Number">LCCN</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://id.loc.gov/authorities/subjects/sh85143964">sh85143964</a></span></span></li> <li><span class="nowrap"><a href="/wiki/Loty%C5%A1sk%C3%A1_n%C3%A1rodn%C3%AD_knihovna" title="Lotyšská národní knihovna">LNB</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://kopkatalogs.lv/F?func=direct&local_base=lnc10&doc_number=000236086&P_CON_LNG=ENG">000236086</a></span></span></li> <li><span class="nowrap"><a href="/wiki/N%C3%A1rodn%C3%AD_parlamentn%C3%AD_knihovna_Japonska" title="Národní parlamentní knihovna Japonska">NDL</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://id.ndl.go.jp/auth/ndlna/00569443">00569443</a></span></span></li> <li><span class="nowrap"><a href="/wiki/N%C3%A1rodn%C3%AD_knihovna_Izraele" title="Národní knihovna Izraele">NLI</a>: <span class="uid"><a rel="nofollow" class="external text" href="http://olduli.nli.org.il/F/?func=find-b&local_base=NLX10&find_code=UID&request=987007543709905171">987007543709905171</a></span></span></li></ul> </div></td></tr></tbody></table></div> <style data-mw-deduplicate="TemplateStyles:r16915398">.mw-parser-output div/**/#portallinks a{font-weight:bold}</style><div id="portallinks" class="catlinks"><a href="/wiki/Port%C3%A1l:Obsah" title="Portál:Obsah">Portály</a>: <a href="/wiki/Port%C3%A1l:Chemie" title="Portál:Chemie">Chemie</a> | <a href="/wiki/Port%C3%A1l:Medic%C3%ADna" title="Portál:Medicína">Medicína</a> </div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Citováno z „<a dir="ltr" href="https://cs.wikipedia.org/w/index.php?title=Vitamín_B2&oldid=20192287">https://cs.wikipedia.org/w/index.php?title=Vitamín_B2&oldid=20192287</a>“</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/N%C3%A1pov%C4%9Bda:Kategorie" title="Nápověda:Kategorie">Kategorie</a>: <ul><li><a href="/wiki/Kategorie:ATC_A11HA" title="Kategorie:ATC A11HA">ATC A11HA</a></li><li><a href="/wiki/Kategorie:Vitam%C3%ADny" title="Kategorie:Vitamíny">Vitamíny</a></li><li><a href="/wiki/Kategorie:Flaviny" title="Kategorie:Flaviny">Flaviny</a></li><li><a href="/wiki/Kategorie:Z%C3%A1kladn%C3%AD_a_speci%C3%A1ln%C3%AD_esenci%C3%A1ln%C3%AD_l%C3%A9%C4%8Diva_dle_WHO" title="Kategorie:Základní a speciální esenciální léčiva dle WHO">Základní a speciální esenciální léčiva dle WHO</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Skryté kategorie: <ul><li><a href="/wiki/Kategorie:Monitoring:%C4%8Cl%C3%A1nky_s_identifik%C3%A1torem_PSH" title="Kategorie:Monitoring:Články s identifikátorem PSH">Monitoring:Články s identifikátorem PSH</a></li><li><a href="/wiki/Kategorie:Monitoring:%C4%8Cl%C3%A1nky_s_identifik%C3%A1torem_BNF" title="Kategorie:Monitoring:Články s identifikátorem BNF">Monitoring:Články s identifikátorem BNF</a></li><li><a href="/wiki/Kategorie:Monitoring:%C4%8Cl%C3%A1nky_s_identifik%C3%A1torem_GND" title="Kategorie:Monitoring:Články s identifikátorem GND">Monitoring:Články s identifikátorem GND</a></li><li><a href="/wiki/Kategorie:Monitoring:%C4%8Cl%C3%A1nky_s_identifik%C3%A1torem_LCCN" title="Kategorie:Monitoring:Články s identifikátorem LCCN">Monitoring:Články s identifikátorem LCCN</a></li><li><a href="/wiki/Kategorie:Monitoring:%C4%8Cl%C3%A1nky_s_identifik%C3%A1torem_LNB" title="Kategorie:Monitoring:Články s identifikátorem LNB">Monitoring:Články s identifikátorem LNB</a></li><li><a href="/wiki/Kategorie:Monitoring:%C4%8Cl%C3%A1nky_s_identifik%C3%A1torem_NDL" title="Kategorie:Monitoring:Články s identifikátorem NDL">Monitoring:Články s identifikátorem NDL</a></li><li><a href="/wiki/Kategorie:Monitoring:%C4%8Cl%C3%A1nky_s_identifik%C3%A1torem_NLI" title="Kategorie:Monitoring:Články s identifikátorem NLI">Monitoring:Články s identifikátorem NLI</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Stránka byla naposledy editována 19. 7. 2021 v 10:18.</li> <li id="footer-info-copyright">Text je dostupný pod <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.cs">licencí Creative Commons Uveďte původ – Zachovejte licenci</a>, případně za dalších podmínek. 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