ArticleFrontiers in nutrition2025
The relationship between vitamin D levels and Alzheimer's disease risk: insights from a centenarian study of Chinese women.
Article in Frontiers in nutrition, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Ultraviolet radiation and neurodegeneration: molecular mechanisms underlying dual neuroprotective and neurotoxic effects.Frontiers in cellular neuroscience · 2026Review
- Increased risk of incident dementia associated with vitamin D deficiency in glaucoma patients: a TriNetX cohort study.Frontiers in nutrition · 2026Article
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11 authors.
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Abstract
Background: While vitamin D₃ (VD₃) has been implicated in Alzheimer's disease (AD) prevention, limited evidence exists among centenarians-particularly women-who exhibit unique cognitive aging trajectories. This study aimed to examine the association between serum 25-hydroxyvitamin D [25(OH)D] levels and AD risk in Chinese female centenarians. Methods: We included 514 female participants aged ≥100 years from the China Healthy Longevity Multicenter Study (CHLMS). AD was diagnosed using education-adjusted MMSE thresholds and clinical exclusion of non-AD dementias. Serum 25(OH)D and biochemical markers were measured using standardized laboratory protocols. Logistic regression models (unadjusted and progressively adjusted) assessed associations between 25(OH)D and AD. Restricted cubic spline (RCS) and piecewise regressions evaluated non-linear and threshold effects, while subgroup analyses explored effect modification. Results: Higher serum 25(OH)D levels were independently associated with lower odds of AD (adjusted OR per 1 ng/mL: 0.95; 95% CI: 0.90-1.00; Conclusion: Among Chinese female centenarians, serum vitamin D₃ levels are inversely associated with AD risk in a dose-dependent manner, particularly below 29.3 ng/mL. These findings highlight the relevance of vitamin D₃ as a potentially modifiable factor in cognitive aging and support further interventional studies in the oldest-old population.
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