Web source
NIH Office of Dietary Supplements. Dietary Supplement Fact Sheets. Bethesda, MD: National Institutes of Health. https://ods.od.nih.gov/factsheets/list-all/
Why we cite it
Serves as the authoritative U.S. government source for evidence-based information on dietary supplements. The fact sheet collection (200+ topics) provides standardized, regularly updated summaries of scientific evidence on vitamins, minerals, botanicals, and specialty supplements, available in both consumer and health professional versions.