Researchers analyzed 11 trials with 655 adults and discovered that taking vitamin D2 supplements decreases the body's vitamin D3 levels, a previously unknown effect.

Researchers from the University of Surrey in the UK found that taking vitamin D2 can cause reduced levels of vitamin D3 in ...

Some prenatal vitamins contain a "concerning" amount of arsenic, lead or cadmium, while others don't have key nutrients needed for a healthy pregnancy, a new study finds. Getty Images Some prenatal ...

Research warns that one widely used vitamin D supplement may unintentionally lower the body’s natural D3 levels.

Vitamins are nutrients that are found in the foods we eat. They’re needed for functions such as growth, metabolism, and nervous system activities. Share on Pinterest Anna Denisova/Getty Images Often, ...

Our bodies create vitamin D when ultraviolet rays in sunlight convert a protein called 7-dehydrocholesterol in the skin into a type of vitamin D known as vitamin D3. When sunlight is sparse during ...

Medically reviewed by Alex Yampolsky, PharmD Vitamin D2 is plant-based; vitamin D3 comes from sunlight and animal products.Vitamin D3 may be more effective than D2 at raising vitamin D levels and ...

Prenatal vitamins, typically recommended for expectant mothers, are gaining popularity among non-pregnant women who hope they can boost hair growth and improve overall beauty. But does scientific ...

If you’re like most Americans, your cupboards contain an array of supplements. A 2018 survey showed that 75% of U.S. residents are consuming some sort of dietary supplement, whether it be a probiotic, ...