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<h1 id="firstHeading" class="firstHeading mw-first-heading">β-Cryptoxanthin</h1>
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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="de" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="de" dir="ltr"><table class="wikitable infobox float-right" id="Vorlage_Infobox_Chemikalie" style="font-size:90%; margin-top:0; width:350px;" summary="Infobox Chemikalie">
<tbody><tr>
<th colspan="2" style="background:#FFDEAD; color:#202122;">Strukturformel
</th></tr>
<tr>
<td colspan="2" class="hintergrundfarbe-basis skin-invert-image" style="text-align:center;"><span typeof="mw:File"></span>
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<th colspan="2" style="background:#FFDEAD; color:#202122;">Allgemeines
</th></tr>
<tr>
<td style="width:33%;">Name
</td>
<td>β-Cryptoxanthin
</td></tr>
<tr>
<td>Andere Namen
</td>
<td>
<ul><li>Caricaxanthin</li>
<li>Hydroxy-β-caroten</li>
<li>(3<i>R</i>)-β,β-Caroten-3-ol</li>
<li>Cryptoxanthol</li></ul>
</td></tr>
<tr>
<td><a href="Summenformel" title="Summenformel">Summenformel</a>
</td>
<td>C<sub>40</sub>H<sub>56</sub>O
</td></tr>
<tr>
<td>Kurzbeschreibung
</td>
<td>
<p>roter Feststoff<sup id="cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-0" class="reference"><a href="#cite_note-Gerhard_Eisenbrand,_Peter_Schreier-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</p>
</td></tr>
<tr>
<th colspan="2" style="background:#FFDEAD; color:#202122;">Externe Identifikatoren/Datenbanken
</th></tr>
<tr>
<td colspan="2" style="padding:0;">
<table class="mw-collapsible mw-collapsed wikitable" data-expandtext="+" data-collapsetext="−" style="border-top:none; margin:-1px; width:calc(100% + 2px);">
<tbody><tr>
<td style="width:33%;"><a href="CAS-Nummer" title="CAS-Nummer">CAS-Nummer</a>
</td>
<td><span title="Untervorlage eingebunden: CASRN"></span><a rel="nofollow" class="external text" href="https://commonchemistry.cas.org/detail?cas_rn=472-70-8">472-70-8</a><span class="editoronly" style="display:none;"></span>
</td>
<td style="background:#FFDEAD; color:#202122; border-top:1px solid #FFDEAD; padding:0.2em 0; vertical-align:bottom; width:5%;">
</td></tr>
<tr>
<td><a href="PubChem" title="PubChem">PubChem</a>
</td>
<td colspan="2"><a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/compound/5281235">5281235</a>
</td></tr>
<tr>
<td><a href="ChemSpider" title="ChemSpider">ChemSpider</a>
</td>
<td colspan="2"><a rel="nofollow" class="external text" href="https://www.chemspider.com/Chemical-Structure.4444647.html">4444647</a>
</td></tr>
<tr>
<td><a href="DrugBank" title="DrugBank">DrugBank</a>
</td>
<td colspan="2"><a rel="nofollow" class="external text" href="https://www.drugbank.ca/drugs/DB15914">DB15914</a>
</td></tr>
<tr>
<td style="border-right:1px solid #a2a9b1;"><a href="Wikidata" title="Wikidata">Wikidata</a>
</td>
<td colspan="2"><a href="https://www.wikidata.org/wiki/Q392062" class="extiw external" title="d:Q392062">Q392062</a>
</td></tr></tbody></table>
</td></tr>
<tr>
<th colspan="2" style="background:#FFDEAD; color:#202122;">Eigenschaften
</th></tr>
<tr>
<td><a href="Molare_Masse" title="Molare Masse">Molare Masse</a>
</td>
<td>552,87 g·<a href="Mol" title="Mol">mol</a><sup>−1</sup>
</td></tr>
<tr>
<td><a href="Aggregatzustand" title="Aggregatzustand">Aggregatzustand</a>
</td>
<td>
<p>fest<sup id="cite_ref-Sigma_2-0" class="reference"><a href="#cite_note-Sigma-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</p>
</td></tr>
<tr>
<td><a href="Schmelzpunkt" title="Schmelzpunkt">Schmelzpunkt</a>
</td>
<td>
<ul><li>169–170 <a href="Grad_Celsius" title="Grad Celsius">°C</a><sup id="cite_ref-Sigma_2-1" class="reference"><a href="#cite_note-Sigma-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li>
<li>158–159 °C (Racemate)<sup id="cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-1" class="reference"><a href="#cite_note-Gerhard_Eisenbrand,_Peter_Schreier-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></li></ul>
</td></tr>
<tr>
<td><a href="L%C3%B6slichkeit" title="Löslichkeit">Löslichkeit</a>
</td>
<td>
<ul><li>praktisch unlöslich in Wasser<sup id="cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-2" class="reference"><a href="#cite_note-Gerhard_Eisenbrand,_Peter_Schreier-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></li>
<li>wenig löslich in Methanol, Ethanol und Petrolether<sup id="cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-3" class="reference"><a href="#cite_note-Gerhard_Eisenbrand,_Peter_Schreier-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></li>
<li>gut löslich in Trichlormethan und Fetten<sup id="cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-4" class="reference"><a href="#cite_note-Gerhard_Eisenbrand,_Peter_Schreier-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></li>
<li>schwer löslich in <a href="Chloroform" title="Chloroform">Chloroform</a><sup id="cite_ref-Sigma_2-2" class="reference"><a href="#cite_note-Sigma-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li></ul>
</td></tr>
<tr>
<th colspan="2" style="background:#FFDEAD; color:#202122;">Sicherheitshinweise
</th></tr>
<tr>
<td colspan="2">
<table cellspacing="0" cellpadding="2" style="width:100%;">
<tbody><tr>
<td colspan="2" style="text-align:center"><b><a href="Global_harmonisiertes_System_zur_Einstufung_und_Kennzeichnung_von_Chemikalien" title="Global harmonisiertes System zur Einstufung und Kennzeichnung von Chemikalien">GHS-Gefahrstoffkennzeichnung</a></b><sup id="cite_ref-Sigma_2-3" class="reference"><a href="#cite_note-Sigma-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
<table class="hintergrundfarbe-neutral" style="text-align:center; margin-left:auto; margin-right:auto; display:flex; justify-content:center;">
<tbody><tr>
<td><i>keine GHS-Piktogramme</i>
</td></tr></tbody></table>
<p>
</p>
</td></tr>
<tr>
<td rowspan="2" width="33%" style="border-top:1px #A7A7A7 dashed; border-right:1px #A7A7A7 dashed;"><a href="H-_und_P-S%C3%A4tze" title="H- und P-Sätze">H- und P-Sätze</a>
</td>
<td style="border-top:1px #A7A7A7 dashed;">H: <span title="Untervorlage eingebunden: H-Sätze"></span><i>keine H-Sätze</i>
</td></tr>
<tr>
<td style="border-top:1px #A7A7A7 dashed;">P: <span title="Untervorlage eingebunden: P-Sätze"></span><i>keine P-Sätze</i><sup id="cite_ref-Sigma_2-4" class="reference"><a href="#cite_note-Sigma-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</td></tr>
</tbody></table>
</td></tr>
<tr>
<td colspan="2" style="background:#FFDEAD; color:#202122; font-size:80%; text-align:center; line-height:150%; padding:.25em;">Wenn nicht anders vermerkt, gelten die angegebenen Daten bei <a href="Standardbedingungen" title="Standardbedingungen">Standardbedingungen</a> (0 °C, 1000 hPa).
</td></tr></tbody></table><p><span class="editoronly" style="display:none;"></span>
</p><p><b>β-Cryptoxanthin</b> ist eine <a href="Chemische_Verbindung" title="Chemische Verbindung">chemische Verbindung</a> aus der Gruppe der <a href="Carotinoide" title="Carotinoide">Carotinoide</a> mit geschlossenem β-<a href="Ionon" class="mw-redirect" title="Ionon">Ionon</a>-Ring.
</p><p>Beim Cryptoxanthin unterscheidet man α- und β-Cryptoxanthin, je nachdem, ob es sich von α- oder <a href="%CE%92-Carotin" class="mw-redirect" title="Β-Carotin">β-Carotin</a> durch Einführung einer <a href="Hydroxygruppe" title="Hydroxygruppe">Hydroxygruppe</a> in einen Iononring ableiten lässt. β-Cryptoxanthin ist ein <a href="Provitamin_A" class="mw-redirect" title="Provitamin A">Provitamin A</a>, allerdings kann nur ein Molekül <a href="Vitamin_A" title="Vitamin A">Vitamin A</a> pro Molekül β-Cryptoxanthin gebildet werden.<sup id="cite_ref-Robert_Ebermann,_Ibrahim_Elmadfa_3-0" class="reference"><a href="#cite_note-Robert_Ebermann,_Ibrahim_Elmadfa-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="Vorkommen">Vorkommen</h2></div>
<p>Beide Cryptoxanthine kommen in Orangen vor, die wahrscheinlich die größte Vielfalt von allen Lebensmitteln an Carotinoiden enthalten (<a href="%CE%91-Carotin" class="mw-redirect" title="Α-Carotin">α-</a>, β-Carotin, <a href="Lutein" title="Lutein">Lutein</a>, α-<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>, β-Cryptoxanthin, <a href="Violaxanthin" title="Violaxanthin">Violaxanthin</a> und viele andere). Cryptoxanthine kommen auch in der <a href="Papaya" title="Papaya">Papaya</a>, <a href="Karotte" title="Karotte">Karotten</a>, <a href="Paprika" title="Paprika">Paprika</a>, <a href="Mandarine" title="Mandarine">Mandarinen</a>, <a href="Weizenkeim%C3%B6l" class="mw-redirect" title="Weizenkeimöl">Weizenkeimöl</a>, <a href="Physalis" class="mw-redirect" title="Physalis">Physalis</a>, im <a href="K%C3%BCrbis" class="mw-redirect" title="Kürbis">Kürbis</a> und anderen Früchten, in der <a href="Butter" title="Butter">Butter</a> und im <a href="Eidotter" class="mw-redirect" title="Eidotter">Eidotter</a> vor. Sie sind als gelbes Pigment in der Blüte der <a href="Sonnenblume" title="Sonnenblume">Sonnenblume</a> (Helianthus annuus) enthalten. α- und β-Cryptoxanthin sind in Form von <a href="Ester" title="Ester">Estern</a> neben Lutein und <a href="Zeaxanthin" title="Zeaxanthin">Zeaxanthin</a> in der menschlichen Haut enthalten.<sup id="cite_ref-Robert_Ebermann,_Ibrahim_Elmadfa_3-1" class="reference"><a href="#cite_note-Robert_Ebermann,_Ibrahim_Elmadfa-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-5" class="reference"><a href="#cite_note-Gerhard_Eisenbrand,_Peter_Schreier-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Es ist auch im Blutplasma von Primaten<sup id="cite_ref-IARC_5-0" class="reference"><a href="#cite_note-IARC-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> einschließlich des Menschen nachweisbar, wobei die Konzentration niedriger als β-Carotin und Lutein ist. Die Konzentration ist gewöhnlich bei Frauen höher als bei Männern. Die Halbwertszeit im menschlichen Blut ist kleiner als 12 Tage.<sup id="cite_ref-IARC_5-1" class="reference"><a href="#cite_note-IARC-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="Eigenschaften">Eigenschaften</h2></div>
<p>β-Cryptoxanthin ist ein roter Feststoff, der praktisch unlöslich in Wasser ist.<sup id="cite_ref-Sigma_2-5" class="reference"><a href="#cite_note-Sigma-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="Verwendung">Verwendung</h2></div>
<p>β-Cryptoxanthin soll zusammen mit <a href="Zink" title="Zink">Zink</a> präventiv gegen <a href="Rheumatoide_Arthritis" title="Rheumatoide Arthritis">rheumatoide Arthritis</a> wirken.<sup id="cite_ref-Robert_Ebermann,_Ibrahim_Elmadfa_3-2" class="reference"><a href="#cite_note-Robert_Ebermann,_Ibrahim_Elmadfa-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Als Lebensmittelfarbstoff ist es trotz Unschädlichkeit nicht zugelassen.<sup id="cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-6" class="reference"><a href="#cite_note-Gerhard_Eisenbrand,_Peter_Schreier-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Es gibt Hinweise auf krebsvorbeugende Wirkungen bei Lungenkrebs.<sup id="cite_ref-Siegfried_Knasmüller_6-0" class="reference"><a href="#cite_note-Siegfried_Knasmüller-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Hartmut_Bertz,_Gudrun_Zürcher_7-0" class="reference"><a href="#cite_note-Hartmut_Bertz,_Gudrun_Zürcher-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="Einzelnachweise">Einzelnachweise</h2></div>
<ol class="references">
<li id="cite_note-Gerhard_Eisenbrand,_Peter_Schreier-1"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-0">a</a></sup> <sup><a href="#cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-1">b</a></sup> <sup><a href="#cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-2">c</a></sup> <sup><a href="#cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-3">d</a></sup> <sup><a href="#cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-4">e</a></sup> <sup><a href="#cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-5">f</a></sup> <sup><a href="#cite_ref-Gerhard_Eisenbrand,_Peter_Schreier_1-6">g</a></sup></span> <span class="reference-text">Gerhard Eisenbrand, Peter Schreier: <cite style="font-style:italic">RÖMPP Lexikon Lebensmittelchemie, 2. Auflage, 2006</cite>. Georg Thieme Verlag, 2014, ISBN 978-3-13-179282-2, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>231</span> (<a rel="nofollow" class="external text" href="https://books.google.de/books?id=qyWGAwAAQBAJ&pg=PA231#v=onepage">eingeschränkte Vorschau</a> in der Google-Buchsuche).<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:%CE%92-Cryptoxanthin&rft.au=Gerhard+Eisenbrand%2C+Peter+Schreier&rft.btitle=R%C3%96MPP+Lexikon+Lebensmittelchemie%2C+2.+Auflage%2C+2006&rft.date=2014&rft.genre=book&rft.isbn=9783131792822&rft.pages=231&rft.pub=Georg+Thieme+Verlag" style="display:none"> </span></span>
</li>
<li id="cite_note-Sigma-2"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Sigma_2-0">a</a></sup> <sup><a href="#cite_ref-Sigma_2-1">b</a></sup> <sup><a href="#cite_ref-Sigma_2-2">c</a></sup> <sup><a href="#cite_ref-Sigma_2-3">d</a></sup> <sup><a href="#cite_ref-Sigma_2-4">e</a></sup> <sup><a href="#cite_ref-Sigma_2-5">f</a></sup></span> <span class="reference-text">Datenblatt <span style="font-style:italic;"><a rel="nofollow" class="external text" href="https://www.sigmaaldrich.com/catalog/product/SIGMA/C6368">β-Cryptoxanthin, ≥97% (TLC)</a></span> bei <a href="Sigma-Aldrich" title="Sigma-Aldrich">Sigma-Aldrich</a>, abgerufen am 4. März 2018 (<a rel="nofollow" class="external text" href="https://www.sigmaaldrich.com/DE/de/sds/SIGMA/C6368?userType=anonymous">PDF</a>).<span class="editoronly" style="display:none;"></span></span>
</li>
<li id="cite_note-Robert_Ebermann,_Ibrahim_Elmadfa-3"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Robert_Ebermann,_Ibrahim_Elmadfa_3-0">a</a></sup> <sup><a href="#cite_ref-Robert_Ebermann,_Ibrahim_Elmadfa_3-1">b</a></sup> <sup><a href="#cite_ref-Robert_Ebermann,_Ibrahim_Elmadfa_3-2">c</a></sup></span> <span class="reference-text">Robert Ebermann, Ibrahim Elmadfa: <cite style="font-style:italic">Lehrbuch Lebensmittelchemie und Ernährung</cite>. Springer-Verlag, 2011, ISBN 978-3-7091-0211-4, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>221</span> (<a rel="nofollow" class="external text" href="https://books.google.de/books?id=84AkBAAAQBAJ&pg=PA221#v=onepage">eingeschränkte Vorschau</a> in der Google-Buchsuche).<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:%CE%92-Cryptoxanthin&rft.au=Robert+Ebermann%2C+Ibrahim+Elmadfa&rft.btitle=Lehrbuch+Lebensmittelchemie+und+Ern%C3%A4hrung&rft.date=2011&rft.genre=book&rft.isbn=9783709102114&rft.pages=221&rft.pub=Springer-Verlag" style="display:none"> </span></span>
</li>
<li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text">Externe Identifikatoren von bzw. Datenbank-Links zu <span style="font-style:italic">α-Cryptoxanthin</span>: <a href="CAS-Nummer" title="CAS-Nummer">CAS-Nr.</a>: <span title="Untervorlage eingebunden: CASRN"></span><a rel="nofollow" class="external text" href="https://commonchemistry.cas.org/detail?cas_rn=24480-38-4">24480-38-4</a><span class="editoronly" style="display:none;"></span>, <a href="PubChem" title="PubChem">PubChem</a>: <a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/compound/5281234">5281234</a>, <a href="ChemSpider" title="ChemSpider">ChemSpider</a>: <a rel="nofollow" class="external text" href="http://www.chemspider.com/Chemical-Structure.4444646.html">4444646</a>, <a href="Wikidata" title="Wikidata">Wikidata</a>: <a href="https://www.wikidata.org/wiki/Q27133768" class="extiw external" title="d:Q27133768">Q27133768</a>.<span class="editoronly" style="display:none;"></span></span>
</li>
<li id="cite_note-IARC-5"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-IARC_5-0">a</a></sup> <sup><a href="#cite_ref-IARC_5-1">b</a></sup></span> <span class="reference-text">IARC Working Group on the Evaluation of Cancer-preventive Agents, World Health Organization, <a href="International_Agency_for_Research_on_Cancer" class="mw-redirect" title="International Agency for Research on Cancer">International Agency for Research on Cancer</a>: <cite style="font-style:italic">Carotenoids</cite>. IARC, 1998, ISBN 92-832-3002-7, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>46</span> (<a rel="nofollow" class="external text" href="https://books.google.de/books?id=mQHnOKLSd54C&pg=PA46#v=onepage">eingeschränkte Vorschau</a> in der Google-Buchsuche).<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:%CE%92-Cryptoxanthin&rft.au=IARC+Working+Group+on+the+Evaluation+of+Cancer-preventive+Agents%2C+World+Health+Organization%2C+International+Agency+for+Research+on+Cancer&rft.btitle=Carotenoids&rft.date=1998&rft.genre=book&rft.isbn=9283230027&rft.pages=46&rft.pub=IARC" style="display:none"> </span></span>
</li>
<li id="cite_note-Siegfried_Knasmüller-6"><span class="mw-cite-backlink"><a href="#cite_ref-Siegfried_Knasmüller_6-0">↑</a></span> <span class="reference-text">Siegfried Knasmüller: <cite style="font-style:italic">Krebs und Ernährung Risiken und Prävention - wissenschaftliche Grundlagen und Ernährungsempfehlungen</cite>. Georg Thieme Verlag, 2014, ISBN 978-3-13-170581-5, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>260</span> (<a rel="nofollow" class="external text" href="https://books.google.de/books?id=oL5oAwAAQBAJ&pg=PA260#v=onepage">eingeschränkte Vorschau</a> in der Google-Buchsuche).<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:%CE%92-Cryptoxanthin&rft.au=Siegfried+Knasm%C3%BCller&rft.btitle=Krebs+und+Ern%C3%A4hrung+Risiken+und+Pr%C3%A4vention+-+wissenschaftliche+Grundlagen+und+Ern%C3%A4hrungsempfehlungen&rft.date=2014&rft.genre=book&rft.isbn=9783131705815&rft.pages=260&rft.pub=Georg+Thieme+Verlag" style="display:none"> </span></span>
</li>
<li id="cite_note-Hartmut_Bertz,_Gudrun_Zürcher-7"><span class="mw-cite-backlink"><a href="#cite_ref-Hartmut_Bertz,_Gudrun_Zürcher_7-0">↑</a></span> <span class="reference-text">Hartmut Bertz, Gudrun Zürcher: <cite style="font-style:italic">Ernährung in der Onkologie Grundlagen und klinische Praxis</cite>. Schattauer Verlag, 2014, ISBN 978-3-7945-2804-2, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>118</span> (<a rel="nofollow" class="external text" href="https://books.google.de/books?id=c1MbBAAAQBAJ&pg=PA118#v=onepage">eingeschränkte Vorschau</a> in der Google-Buchsuche).<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:%CE%92-Cryptoxanthin&rft.au=Hartmut+Bertz%2C+Gudrun+Z%C3%BCrcher&rft.btitle=Ern%C3%A4hrung+in+der+Onkologie+Grundlagen+und+klinische+Praxis&rft.date=2014&rft.genre=book&rft.isbn=9783794528042&rft.pages=118&rft.pub=Schattauer+Verlag" style="display:none"> </span></span>
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