Dietary supplement adulteration - knowledge, attitudes, and practices of California health care professionals: A cross-sectional survey study.

Abstract

To assess knowledge, attitudes, and practices surrounding dietary supplements (DS) among California health care professionals (HCPs) and assess factors contributing to the frequency with which HCPs discuss DS with patients. In this cross-sectional study, an online questionnaire was distributed to HCPs in California from December 2021-April 2022 via professional membership email listservs. Among 514 HCPs, overall knowledge of DS did not vary significantly by professional group, and 90% had received little to no DS education. Pharmacists (OR = 0.328, p = 0.0001) and those with less reported DS education (OR = 0.58, p = 0.0045; OR = 0.075, p = 0.0097) had a decreased likelihood of initiating conversations about DS more frequently. Females (OR = 2.5, p < 0.0001) and those with a higher knowledge score (OR = 1.2, p = 0.0297) had an increased likelihood of initiating conversations about DS more frequently. HCPs acknowledge the clinical significance of DS adulteration and would benefit from additional informational resources to reduce the adverse effects associated with adulterated supplements. HCPs initiate more conversations about DS use when they are more informed and will gain from staying up to date on DS-related information to encourage more patient communication.