FAQ: Dietary Supplements, Complementary, or Alternative Medicines
Information about natural products, dietary supplements, medicinal plants, or other complementary or alternative medicines is available from information sources listed below.
Before starting any supplement, ask your doctor or pharmacist for information. Natural products and dietary supplements may interact with medicine you take.
- MedlinePlus® pages
- NLM® and ODS Dietary Supplement Label Database (DSLD)
- NLM PubMed® search with PubMed Complementary Medicine on
- NLM: Dietary Supplements PubMed Subset
- Type dietsuppl [sb] to get a list of all PubMed articles indexed under this subheading, or
- Add dietsuppl [sb] to your search, or
- Limit your PubMed search by selecting "Limits", then "Dietary Supplements" Subset
- National Cancer Institute (NCI) Complementary and Alternative Medicine
- National Institutes of Health (NIH) National Center for Complementary and Alternative Medicine (NCCAM)
- ClinicalTrials.gov Complementary OR Alternative trials
- NIH Office of Dietary Supplements (ODS) homepage and Making Decisions
- Food and Nutrition Information Center (FNIC/NAL) Dietary Supplements
- Nutrition.gov Safety and Health Claims
- FDA Center for Food Safety & Applied Nutrition Dietary Supplements Overview
- USP Herbal Medicines Compendium
- Natural Medicines Comprehensive Database (fee-based)
- Natural Standard Database (fee-based)
- How can I identify a pill?
- Where can I find information about drug formulations and interactions?
- Where can I find information about international (non-US) drugs?