Here’s what vitamin D3 is and why your body needs it.

BOSTON -- Most healthy adults under 75 can get by with the recommended daily allowance of vitamin D, but some groups should supplement with more, according to a 14-item clinical practice guideline ...

Vitamin D supplements are widely used around the world, but health experts say it’s important to understand how daily intake can affect the body over time.

YORK, Pa. — Vitamin D might just be one of the simplest ways to improve your health. "Vitamin D helps keep our bones strong, but it also can help our immune system, it can help our muscle development, ...

Medically reviewed by Alex Yampolsky, PharmD Taking vitamin C and D together is generally safe if you stay within the recommended doses. Vitamin C and D supplements may support your immune health and ...

Vitamin D is an essential nutrient for your immune system, heart health, and more. However, most Americans don't get enough vitamin D.

Two doses of vitamin D were investigated for their potential to have a positive impact on systolic and diastolic blood pressures when administered in conjunction with calcium. Outcomes in a new ...

Research suggests that taking vitamin K supplements could prevent the 'worrying' side effects associated with taking vitamin D tablets.

Many people supplement with vitamin D, especially during the colder months when it’s more difficult to get your daily dose from sunlight (since your skin makes vitamin D with sufficient sunlight ...