Medically reviewed by Erika Prouty, PharmD If you take vitamin D supplements to treat any deficiencies, it's essential to ...

Vitamin D2 comes from plants, while vitamin D3 comes from animals and sunlight. Research has shown that D3 raises your blood levels more efficiently.

A new study suggests that personalized vitamin D3 supplementation, tailored to individual blood levels, may significantly reduce the risk of a second heart attack in patients who have already ...

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 ...

Experts recommend continuing vitamin D supplements in the summer to ensure your body has adequate levels year-round. While sun exposure can help, various factors can limit vitamin D production even in ...

Note: The U.S. Food and Drug Administration (FDA) does not approve supplements for safety or effectiveness. Talk to a healthcare professional about whether a supplement is the right fit for your ...

Nearly a quarter of Americans are estimated to have a vitamin D deficiency. Why is that? A 2022 study of National Health and Nutrition Examination Surveys (NHANES) data estimated that about 22% of ...

Emerging evidence highlights the critical role of vitamin D3 in cellular aging and immune health, particularly through its potential to preserve leukocyte telomere length (LTL)—a biomarker of ...

When most people think of vitamin D, they usually think about strong bones and a healthy immune system. That’s because this vitamin helps our bodies absorb calcium, which is needed to build and keep ...