We now believe that women need at least 800 units a day of D3, cholecalciferol. That's the stuff our bodies make. Vitamin D pills, multi-vitamin pills and calcium pills may contain D, but you want ...
The human body is able to synthesize Vitamin D3 through exposure to UVB rays from ... individuals is between 600 and 2,000 international units (IU) daily. The body is most efficient at making ...
In this article: Nature Made Vitamin D3 2000 ... units. For younger children, 10 micrograms (400 IU) is adequate and for ...
The average adult needs 600 international units, or IU, of vitamin D per day, whereas older adults may need around 800 IU ... or ergocalciferol, and D3, or cholecalciferol.