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. 1998 Jul 1;148(1):45-50.
doi: 10.1093/oxfordjournals.aje.a009559.

Cohort Study of Vitamin C Intake and Cognitive Impairment

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Cohort Study of Vitamin C Intake and Cognitive Impairment

M Paleologos et al. Am J Epidemiol. .

Abstract

To test the hypothesis that vitamin C protects against cognitive impairment, the authors conducted a cohort study (n=117) in a retirement community in Sydney, Australia. Vitamin C intake was assessed at baseline (1991) with a semiquantitative food frequency questionnaire, and cognitive function was assessed 4 years later (1995). After adjustment for age, sex, smoking, education, total energy intake, and use of psychotropic medications, consumption of vitamin C supplements was associated with a lower prevalence of more severe cognitive impairment (based on scores on the Mini-Mental State Examination; adjusted odds ratio=0.39, 95% confidence interval 0.18-0.84). There were no associations between vitamin C intake and scores on tests of verbal and category fluency. This study suggests that vitamin C might protect against cognitive impairment.

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