Find general information and resources on dietary supplements below. Also see:
- Vitamin and Mineral Supplements
- Herbal Supplements
- Safety and Health Claims
- Dietary Supplements for Athletes
- Commonly Asked Questions
Dietary Supplements
Questions To Ask Before Taking Vitamin and Mineral SupplementsUSDA. NAL. Food and Nutrition Information Center.
Ask these questions before taking a vitamin or mineral supplement to find out if it is safe, effective, necessary, and more.
MedlinePlus: Dietary SupplementsDHHS. NIH. National Library of Medicine.
Understand dietary supplements with information and resources that cover a variety of related topics. Also available in Spanish.
Dietary Supplements for Weight LossDHHS. NIH. Office of Dietary Supplements.
This fact sheet describes what’s known about the safety and effectiveness of many ingredients that are commonly used in weight-loss dietary supplements.
Know the Science: How Medications and Supplements Can InteractDHHS. NIH. National Center for Complementary and Integrative Health.
This interactive tool was designed to help you better understand how medications and supplements can interact in potentially harmful ways, and why it's important to speak with your doctor about supplements.
Dietary and Herbal SupplementsDHHS. NIH. National Center for Complementary and Integrative Health.
Links to information to help understand dietary supplements, find research resources and clinical trials, and more.
MedlinePlus: Herbs and SupplementsDHHS. NIH. National Library of Medicine.
Find resources for over 100 herbs and supplements organized alphabetically.
Office of Dietary SupplementsDHHS. NIH. Office of Dietary Supplements.
Find evidence-based information about dietary supplements. Resources include:
Questions and Answers on Dietary SupplementsDHHS. NIH. Office of Dietary Supplements.
Frequently asked questions about dietary supplements.
Dietary Supplement Ingredient DatabaseDHHS. NIH. Office of Dietary Supplements
The Dietary Supplement Ingredient Database (DSID) provides estimated levels of ingredients in dietary supplement products sold in the United States.