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  1. Dietary Supplements - Nutrition.gov

  2. What Are Dietary Supplements? - Healthline

  3. FDA 101: Dietary Supplements

  4. Nutrition and healthy eating Nutritional supplements

  5. Dietary Supplements: What You Need to Know - Consumer

  6. Healthline Nutrition — Vitamins & Supplements

  7. Supplements: Purpose, Types, Benefits, Risks - Health

  8. Dietary Supplement Fact Sheets

  9. Background Information: Dietary Supplements - Consumer

  10. Overview of Dietary Supplements - The Merck Manuals