Medically reviewed by Jamie Johnson, RDN Key Takeaways How fast vitamins work depends on factors such as the type of vitamin, your health, and how consistently you take them.If you’re deficient, you ...

A doctor explains side effects to watch for if you're trying to figure out whether you're taking too many supplements, and ...

Vitamin E also plays an important role in the body's immune system "in keeping blood vessels working at their best," says Kate Zeratsky, a registered dietitian nutritionist at Mayo Clinic in Rochester ...

In a recent review published in the journal Food Research International, researchers reviewed the impact of vitamins C and E and β-carotene on the gut microbiome to understand how known vitamins ...