What is D3 and D4?
Vitamin D3, a.k.a. cholecalciferol, is the form of D made in the human body. It's also widely available in supplement form, as is D2. D4, 22-dihydroergocalciferol, is a very similar molecule found in certain mushroom species. Unlike D3, the effect that D4 has on the human body hasn't been well-studied.
DA: 28 PA: 72 MOZ Rank: 15