Patterns and Determinants of Dietary Supplement Use and Their Public Health Implications Among Adults in Saudi Arabia: A Cross-Sectional Study.

The consumption of dietary supplements is increasing worldwide, yet national data from Saudi Arabia remain limited. This study examined the prevalence, patterns, and predictors of dietary supplement use, with emphasis on vitamin intake. A cross-sectional survey was conducted among 477 adults meeting inclusion criteria. Self-reported data included demographics, supplement use in the past 12 months, types and forms consumed, frequency, motivations, and information sources. Descriptive statistics and logistic regression were applied. Overall, 58% reported using at least one supplement in the past year, with vitamins comprising 81% of use. Pills and capsules were preferred, and daily intake was most common (58%). Female gender (AOR = 2.04; 95% CI: 1.26-3.31) and higher education (AOR = 4.04; 95% CI: 1.88-8.64) significantly predicted vitamin use. Common motivations included health promotion (19%), symptom relief (24%), and physical appearance (10%), with gender differences in reasons related to general health and immunity. Nearly three-quarters of participants relied on informal sources for supplement intake. Dietary supplement use is prevalent, particularly among women and the highly educated. Targeted education and regulatory measures are needed to promote safe, informed use, aligning with the national health strategies under Saudi Vision 2030.