Vitamin D3 Products

Vitamin D3, or cholecalciferol, is one of the two main forms of vitamin D used in supplements. Both D2 and D3 raise blood vitamin D levels, although D3 may raise them higher and for longer in some people.

Vitamin D helps the body absorb calcium and supports normal bone, muscle, nerve, and immune function. A supplement can help provide vitamin D when food and sun exposure do not meet a person's needs, but individual status is best assessed with a healthcare professional.

Vitamin D3 powders can be highly concentrated, so use only the measuring method and serving listed on the product label. Check whether the amount is shown in micrograms, International Units, or both, and include vitamin D from other supplements when reviewing your total intake.