U.S. regulation guide · Updated July 21, 2026

How are weight-loss supplements regulated in the United States?

FDA regulates dietary supplements, but generally does not approve them for safety or effectiveness before sale. Manufacturers and distributors are responsible for lawful products and truthful labeling; FDA and FTC can take action against unsafe, adulterated, misbranded, or deceptively advertised products.

Important distinction: “FDA registered” is not “FDA approved.” Registration or inspection of a facility does not mean FDA endorses the finished supplement.

What happens before sale?

Unlike drugs, most dietary supplements do not undergo FDA premarket approval. Companies are responsible for evaluating safety and ensuring labels comply with federal requirements. Certain new dietary ingredients can trigger a premarket safety-notification requirement, but that is not product approval.

What does FDA do?

FDA inspects facilities, monitors adverse-event reports, reviews labels and marketplace information, investigates complaints, and can act against adulterated or misbranded products after they enter the market.

What does FTC do?

FTC oversees advertising. Objective claims about health benefits or safety must be truthful, non-misleading, and supported by competent and reliable scientific evidence appropriate to the claim.

What claims are not allowed?

A product marketed as a dietary supplement cannot lawfully claim to diagnose, treat, cure, or prevent disease without being regulated as a drug. Structure/function claims require appropriate substantiation and specified disclaimer language.

Sources

By Right From Shelf Editorial Team · U.S. information current to July 21, 2026