About Vitamin D
Vitamin D is a fat-soluble vitamin that was isolated in 1930 and named calciferol. Since then more metabolites have been found and the two major forms of this vitamin are now known to be vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol). Most Popular Types: Vitamin D Prescription, NatureMade Vitamin D, CVS Vitamin D,