White to off-white to light yellow crystalline powder
+100.0° - +110.0° (c=1.5, EtOH)
Store long-term at 2-8°C
REVIEW Vitamin D2 is a provitamin form of vitamin D, also called vitamin D2. It is created when ultraviolet light activates ergosterol. Vitamin D2 is a fat soluble steroid hormone precursor of vitamin D. The principal biologic function of vitamin D is the maintenance of normal levels of serum calcium and phosphorus in the bloodstream by enhancing the efficacy of the small intestine to absorb these minerals from the diet.
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Jones, Glenville. Extrarenal vitamin D activation and interactions between vitamin D2, vitamin D3, and vitamin D analogs. Annual Review of Nutrition. (2013) 33: 23-44.
Reid IR, Bolland MJ, Grey A. Effects of vitamin D supplements on bone mineral density: a systematic review and meta-analysis. Lancet. (2014) Jan 11;383(9912): 146-55.
Karlson, P.Vitamin D1 and D2 Trends in Biochemical Sciences (1981), 6(1), 29-30.