FDA regulates both finished dietary supplement products and dietary ingredients. FDA regulates dietary supplements under a different set of regulations than those covering «conventional» foods and drug products.

Among the claims that can be used on food and dietary supplement labels are three categories of claims that are defined by statute and/or FDA regulations: health claims, nutrient content claims, and structure/function claims.

FDA is responsible for taking action against any adulterated or misbranded dietary supplement product after it reaches the market.

The U.S. Food and Drug Administration’s (FDA) final regulation on good manufacturing practices (GMPs) for dietary supplements established stringent requirements for companies involved with the manufacturing, packaging, labeling and holding of dietary supplements.

The United States Pharmacopeia (USP) is a scientific, nonprofit organization that sets federally recognized public standards of quality for medicines, dietary supplements, and foods.

Five possible reasons for taking supplements or drugs as part of a a workout regimen are to improve muscle growth, muscle recovery, workout intensity, muscle endurance, and weight control.