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Background  Despite experimental evidence implicating oxidative stress in the pathogenesis of PD, epidemiological studies have provided inconsistent associations between dietary antioxidants and risk of developing PD. Furthermore, no study has been done in any Asian population.    Objectives  We examined the associations for intake levels of dietary carotenoids (α‐carotene, β‐carotene, lycopene, β‐cryptoxanthin, and lutein) and vitamins (vitamin A, C and E) and the risk of developing PD.    Methods  We used data from the Singapore Chinese Health Study, a population‐based prospective cohort of 63,257 men and women aged 45 to 74 years during enrollment in 1993–1998. Antioxidant intake was derived from a validated semiquantitative food frequency questionnaire. Incident cases were identified through follow‐up interviews, hospital records, or PD registries through 31 July 2018. Hazard ratios and corresponding 95% confidence intervals were derived from multivariable Cox proportional hazard regression models with adjustment for other lifestyle and dietary factors.    Results  During an average 19.4 years of follow‐up, 544 incident PD cases were identified. No association was found for dietary carotenoids, individually or summed. Hazard ratio comparing highest to lowest quartile for total carotenoids was 0.98 (95% confidence interval: 0.76–1.28;  P  trend  = 0.83). There were also no clear dose‐dependent associations of dietary vitamins A, C, and E with risk of developing PD (all  P  trend  ≥ 0.10). Sensitive analyses with lag time and excluding supplement use did not materially alter results.    Conclusions  Intake of dietary antioxidants, such as carotenoids and vitamins, was not associated with the risk of developing PD in Singaporean Chinese. © 2020 The Authors.  Movement Disorders  published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.

Dietary Antioxidants and Risk of Parkinson's Disease in the Singapore Chinese Health Study