Ryan McVay/Photodisc/Thinkstock U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES Alert / U.S. Department of Health and Human Services / Agency for Toxic Substances and Disease Registry Web / Applied Nutrition / Federal Trade Commission / American Academy of Dermatology / of Health National Center for Complementary / U.S. Food and Drug Administration / Points National Institutes of Health National Center for Complementary / Food Safety / Selected References Agency for Toxic Substances and Disease Registry / /