Dietary supplement use for eye health in adults: knowledge, motivations, and consumption patterns in a nationwide sample of adults in Poland, 2026

Introduction Vision is a key human sense affecting both social and occupational activities. Evidence on the role of nutrients and micronutrients in eye health remains inconsistent. This study aimed to assess self-reported knowledge of diet and eye health and to characterize the use of dietary supplements for vision support among adults in Poland. Methods This cross-sectional questionnaire-based survey was conducted between 13 and 17 March 2026 on a nationwide sample of 1,090 adults in Poland. Self-reported questionnaire was used. Data were collected using Computer-Assisted Web Interviews (CAWI). Results Most respondents reported low or moderate self-reported knowledge of the impact of diet and lifestyle on eye health, with only 10.2% declaring good knowledge. Among the respondents, 27.9% declared use dietary supplements for eye health. Among users, supplementation was mainly driven by preventive decisions (38.8%) and medical recommendations (28.0%), with antioxidant vitamins and omega-3 fatty acids being the most commonly used ingredients. Female gender (aOR = 1.51; 95%CI:1.01–2.27) and residence in both small (