Vitamin A: Perbedaan antara revisi
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Asam retinoat berdifusi ke dalam inti sel dan proliferasi epitel.<ref>{{cite journal|last=Sanif|first=Rizal|date=2017|title=Vitamin A dan perannya dalam siklus sel|url=https://ejournal.unsri.ac.id/index.php/jkk/article/download/6100/3291|journal=Jurnal Kedokteran dan Kesehatan|volume=4|issue=2|pages=84|doi=|issn=2614-0411|id=}}</ref> Lalu ia mengontrol lebih dari 500 gen dengan menempel langsung ke target gen melalui reseptor asam retinoat.
Selain retinol, retinal, dan asam retinoat, juga ada karotenoid yang berasal dari tumbuhan, jamur, dan bakteri yang dapat diubah menjadi retinol dan karenanya merupakan vitamin A. Karotenoid ini ditemukan dalam jaringan dan memiliki sifat antioksidan selain fungsi provitamin.<ref name="PKIN2020Carotenoids">{{Cite book|vauthors=von Lintig J|year=2020|url=https://cloudflare-ipfs.com/ipfs/bafykbzacebet2mr74le7ucb3quxj3b4py3pqevqemleg2rqtfvxmajurefyaa?filename=Bernadette%20P.%20Marriott%20%28editor%29%2C%20Diane%20F.%20Birt%20%28editor%29%2C%20Virginia%20A.%20Stalling%20%28editor%29%2C%20Allison%20A.%20Yates%20%28editor%29%20-%20Present%20Knowledge%20in%20Nutrition%2C%20Volume%201_%20Basic%20Nutrition%20and%20Metabolism-Academic%20Pr.pdf|title=Present Knowledge in Nutrition, Eleventh Edition|location=London, United Kingdom|publisher=Academic Press (Elsevier)|isbn=978-0-323-66162-1|editor-last=BP Marriott|pages=531–49|chapter=Carotenoids|editor-last2=DF Birt|editor-last3=VA Stallings|editor-last4=AA Yates|url-status=live|access-date=2022-01-24|archive-date=2022-01-24|archive-url=https://web.archive.org/web/20220124110628/https://cloudflare-ipfs.com/ipfs/bafykbzacebet2mr74le7ucb3quxj3b4py3pqevqemleg2rqtfvxmajurefyaa?filename=Bernadette%20P.%20Marriott%20(editor),%20Diane%20F.%20Birt%20(editor),%20Virginia%20A.%20Stalling%20(editor),%20Allison%20A.%20Yates%20(editor)%20-%20Present%20Knowledge%20in%20Nutrition,%20Volume%201_%20Basic%20Nutrition%20and%20Metabolism-Academic%20Pr.pdf|dead-url=yes}}</ref>
== Vitamin A bagi kesehatan tubuh ==
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