Vitamin D2 and D3 are types of vitamin D that help maintain or raise vitamin D levels in the blood and treat deficiencies. They have slightly different chemical structures and come from different ...

vitamin D, was unambiguously identified in the 1930s, thanks to the work of researchers studying the chemical structures of members of the cholesterol family.

Long-term daily supplementation with moderate (1600 international units [IU]) or high (3200 IU) doses of vitamin D3 doesn’t reduce the risk for type 2 diabetes (T2D) among generally healthy ...