Is vitamin d3 the same as vitamin d?

Vitamin D3: Vitamin d3 is the most absorbable of the forms of d vitamins available. Make sure the label of your vitamin says d3, vitamin d just refers to all the forms of this vitamin.

D3 one type of D.: There are three types of vitamin D: 1, 2 and 3. In the body, 1 becomes 2, the. 2 becomes 3 and 3 is the active form. 2 becomes 3 with exposure to sunlight, which we generally discourage, which is why vitamin D3 supplementation is so important. About 2000 units of vitamin D3 daily should suffice.