Vitamin D and its Correlation to Covid-19 Wednesday, June 3, 2020Written by: Gabriela Cotne Crystalline vitamin D2 (C28H44O, CAS Reg. No. 50-14-6), also known as ergocalciferol, is the chemical 9,10-seco(5Z,7E,22E)-5,7,10(19),22-ergostatetraen-3-ol. The ingredient is produced by ultraviolet irradiation of ergosterol isolated from yeast and related fungi and is purified by crystallization as described in 21 CFR 184.1950(1).[…]