Download Your Copy of the Guide Improve your understanding of dietary supplements and the claims that can violate policies. LegitScript experts provide answers to the most common questions people have about dietary supplements. This 20-page Dietary Supplements FAQ guide provides helpful resources and in-depth answers to questions, including: What claims are supplements permitted to make? What are disease claims and structure/function claims? What is adequate substantiation? Are there ingredients that are not permitted in dietary supplements? Is there such a thing as "legal steroids"? What about "herbal viagra" or "miracle" weight loss pills?