Figure 4

Percentage of respondents reporting knowledge of government regulation of DS safety for all respondents and according to DS user status. Respondents prompted to answer ‘Yes’, ‘No’, or ‘Don’t know’ to the following question, “Does the U.S. Government require that all dietary supplements sold are safe for consumption?” P < 0.001 indicates a significant association between DS use status and knowledge of government regulation of DS safety according to the Wald chi-square test.