Vitamin D is a health superstar, supporting your body from head to toe. Research suggests that it plays a key role in ...

A large clinical trial suggests vitamin D may slow biological aging by preserving telomeres. Findings from the VITAL randomized controlled trial show that vitamin D supplementation can help preserve ...

Conducted as part of a nationwide four-year trial, the study tracked over 1,000 U.S. adults (men over 50 and women over 55) and found that daily vitamin D3 could reduce biological wear and tear ...

And if you need more, many over-the-counter vitamin D supplements range from 25 to 125 mcg (1,000 to 5,000 IU).