Which U.S. federal agency within the Department of Health and Human Services protects public health by regulating the safety, efficacy, and security of drugs, biological products, medical devices, the food supply, cosmetics, and radiation-emitting products?

• A. Environmental Protection Agency (EPA)
• B. Centers for Disease Control and Prevention (CDC)
• C. National Institutes of Health (NIH)
• D. Food and Drug Administration (FDA)

Answer: (D)

Within the Department of Health and Human Services, the Food and Drug Administration is the agency that protects public health by regulating the safety, efficacy, and security of a wide range of products. The FDA reviews and approves new drugs and biologics to ensure they work as claimed and are safe; it also oversees many medical devices through a risk-based system, requiring premarket review and ongoing quality controls. For the food supply and cosmetics, the FDA sets safety standards, enforces labeling rules, and monitors for unsafe products. It also regulates radiation-emitting products to ensure they meet safety and labeling requirements. This combination of premarket evaluation, manufacturing oversight, postmarket surveillance, and enforcement actions is what distinguishes the FDA in guarding public health across these product areas. Other agencies focus on environmental protection, disease surveillance, or research, but the broad regulatory authority for these categories lies with the FDA.