Which statement best analyzes regulatory and safety concerns about over-the-counter weight-loss supplements compared to prescription anti-obesity drugs?

• A. Both supplements and prescription drugs are regulated identically; therefore there is no difference in oversight or evidence required.
• B. Supplements are regulated by international agencies rather than the FDA and thus are safer due to broader oversight.
• C. Supplements are regulated as foods (safety-focused) not drugs (efficacy-focused), so efficacy is not assured and they may contain undeclared stimulants or banned compounds; prescription drugs undergo stricter testing for safety and efficacy.
• D. Supplements are more rigorously tested than prescription drugs and therefore are always safer and more effective for long-term weight loss.

Answer: (C)