出典:Wiktionary
出典:『Wiktionary』 (2025/11/06 02:53 UTC 版)
ergosterol (countable and uncountable, plural ergosterols)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/22 22:37 UTC 版)
Ergosterol (ergosta-5,7,22-trien-3β-ol), a sterol, is a biological precursor (a provitamin) to vitamin D2. It is turned into viosterol by ultraviolet light, and is then converted into ergocalciferol, which is a form of vitamin D.