This document summarizes regulations for dietary supplements in the United States. It discusses the Dietary Supplement Health and Education Act of 1994 (DSHEA) which defines dietary supplements and regulates their labeling. Supplement labels must include supplement facts, ingredients, and contact information. Claims about nutrients, health effects, structure/function, and drugs are also regulated. Recommended dietary allowances for various vitamins and minerals are established in the U.S. Common supplements contain vitamins, minerals, herbs, botanicals, amino acids, and probiotics.