Vitamin D: Perbedaan antara revisi
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| work = Core Genotyping Facility at the Advanced Technology Center of the National Cancer Institute, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health (NIH), Department of Health and Human Services, International Agency for Research on Cancer, Department of Cancer Epidemiology and Genetics, Masaryk Memorial Cancer Institute, Institute of Public Health, Institute of Carcinogenesis, Cancer Research Centre, Department of Preventive Medicine, Faculty of Medicine, Palacky University, Institute of Hygiene and Epidemiology, First Faculty of Medicine, Charles University, Department of Epidemiology, Institute of Occupational Medicine, Ohio State University Medical Center; Sara Karami, Paul Brennan, Philip S. Rosenberg, Marie Navratilova, Dana Mates, David Zaridze, Vladimir Janout, Helena Kollarova, Vladimir Bencko, Vsevolod Matveev, Neonila Szeszenia-Dabrowska, Ivana Holcatova, Meredith Yeager, Stephen Chanock, Idan Menashe, Nathaniel Rothman, Wong-Ho Chow, Paolo Boffetta, dan Lee E. Moore
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{| class="wikitable" style="width: 40%; float: right; font-size: 90%; margin-left: 25px;"
|-
! scope="col" style="width: 70px;" | Name
! scope="col" width="40px" | Chemical composition
! scope="col" width="70px" | Structure
|-
! Vitamin D<sub>1</sub>
| Campuran komponen molekul [[ergokalsiferol]] dan [[lumisterol]], 1:1
| style="text-align: center;" |
|-
! Vitamin D<sub>2</sub>
| [[ergokalsiferol]] (terbentuk dari [[ergosterol]])
| style="text-align: center;" |[[File:Ergocalciferol.svg|70px|Note [[double bond]] at top center.]]
|-
! Vitamin D<sub>3</sub>
| [[kolekalsiferol]]
(terbentuk dari [[7-dehidrokolesterol|7-dehidrokolesterol]] di kulit).
| style="text-align: center;"|[[File:Cholecalciferol.svg|70px]]
|-
! Vitamin D<sub>4</sub>
| [[22-dihidroergokalsiferol]]
| style="text-align: center;"|[[File:22-Dihydroergocalciferol.svg|70px]]
|-
! Vitamin D<sub>5</sub>
| [[sitokalsiferol]]
(terbentuk dari [[7-dehidrositosterol|7-dehidrositosterol]])
| style="text-align: center;"|[[File:Vitamin D5 structure.svg|70px]]
|}
== Peranan di dalam tubuh ==
Di dalam tubuh, vitamin D dapat membentuk struktur [[tulang]] dan [[gigi]] yang kuat. Vitamin D meningkatkan absorbsi kalsium di saluran pencernaan.<ref name=dis1/> Selain itu, vitamin D juga dapat memperkuat [[sistem kekebalan]] dan mencegah berbagai jenis [[kanker]].<ref name=basic/> Apabila terjadi defisiensi vitamin D, tubuh akan mengalami berbagai gangguan penyakit, antara lain osteoporosis, osteopenia, diabetes, hipertensi, dan berbagai penyakit jantung,<ref name=def>Holick MF. 2007. Vitamin D deficiency. ''Med Pro'' 357:266-281.</ref><ref name=dis1>Lee JH, O'Keefe JH, Bell D, Hensrud DD, Folick MF. 2008. An important, common, and easily treatable cardiovascular risk factor. ''J Am Coll Cardiol'' 52:1949-56.</ref> [[kanker payudara]],<ref>{{en}}{{cite web
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