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Office of Dietary Supplements

Strengthening Knowledge and Understanding of Dietary Supplements

Woman looking at shelves of dietary supplement bottles

Dietary Supplements: What You Need to Know

Learn the basics about the effects, safety, and quality of dietary supplements.

Dietary Supplement Fact Sheets

The Office of Dietary Supplements (ODS) fact sheets give a current overview of individual vitamins, minerals and other dietary supplements. ODS has fact sheets in two versions—Health Professional and QuickFacts. Both versions provide the same types of information but vary in the level of detail. QuickFacts are now available in Spanish. more

Featured Dietary Supplement Fact Sheets

A plate of cooked fish


Selenium is found naturally in many foods, including seafood. More

Mixed nuts


The amount of magnesium you need depends on your age and sex. More