Vitamin D is one of the most widely used dietary supplements in the United States, yet many people take it incorrectly. From ...

Medically reviewed by Jamie Johnson, RDN Key Takeaways Too much vitamin D from supplements can lead to harmful blood levels, ...

Share on Pinterest A new study compared the vitamin D boosting capacity of two forms of vitamin D: D2 and D3. Viktoriya Skorikova/Getty Images Vitamin D deficiency is associated with an increased risk ...

Scientists discovered that vitamin D2 supplements can lower levels of vitamin D3, the form the body uses most effectively. Unlike D2, vitamin D3 enhances the immune system’s first line of defense ...

Despite living in an age of abundant food options and supplements, certain vitamin and mineral deficiencies remain surprisingly common – and vitamin D is among the most widespread. Research suggests ...

Taking vitamin D2 might lower the body's levels of the more efficient form of vitamin D, vitamin D3, according to new research from the University of Surrey, John Innes Center and Quadram Institute ...

Taking one type of vitamin D supplement seems to cut the levels of another type that is more easily used by the body, which could affect our immune system. Our bodies create vitamin D when ultraviolet ...

Vitamin D supplements come in two main types: D2 and D3, and a new meta-analysis finds that taking D2 often lowers blood levels of D3. The researchers pooled data from randomized controlled trials and ...

When you decide to spend money on a vitamin or supplement, you want to be sure it delivers. Which is why it can be a bit disheartening to walk down the vitamin aisle at the drugstore looking for a ...

Vitamin D deficiency is associated with an increased risk of rickets, osteomalacia, cardiovascular conditions, and autoimmune diseases. Vitamin D2 and vitamin D3 are the two forms of vitamin D, and ...