What makes consumers think dietary supplements are safe and effective? The role of disclaimers and FDA approval.

OBJECTIVE: The present study was designed to examine the effect of the Food and Drug Administration's (FDA) regulatory framework on beliefs about the safety and effectiveness of a dietary supplement. DESIGN: An experimental study was conducted with a sample of college students (N = 262). Participants read a description of a dietary supplement, and the experimental manipulations were embedded in the product description. MAIN OUTCOME MEASURES: Primary measures of interest included overall knowledge of the FDA's role in regulating dietary supplements and safety and effectiveness ratings of the dietary supplement. RESULTS: Results demonstrated that individuals were not very knowledgeable about the FDA's role in regulating dietary supplements. Making participants explicitly aware that the FDA did not approve a dietary supplement lowered safety ratings of the supplement but had no influence on effectiveness ratings. The opposite results were obtained for a structure-function disclaimer in which the presence of the disclaimer lowered effectiveness ratings of the supplement but did not affect safety ratings. CONCLUSION: Results highlight the importance of educating individuals about the FDA's role in regulating dietary supplements.