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Updated: Jun 16, 2025
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Highlighting and Reducing the Impact of Negative Aging Stereotypes During Older Adults' Cognitive Testing
Published on: January 24, 2020
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Vitamin D and Cognitive Performance in Older Adults: A Cross-Sectional and Mendelian Randomization Study
Pei-Ying Li1, Nan-Xi Li2,3, Bin Zhang1,4
1Tianjin Anding Hospital, ianjin Medical University, Tianjin, China.
Alpha Psychiatry
|August 16, 2024
Summary
Higher vitamin D levels are linked to reduced cognitive decline risk in older adults. Optimal vitamin D supplementation may be around 79.9 nmol/L for cognitive health.
Area of Science:
- Gerontology
- Nutritional Neuroscience
- Biochemistry
Background:
- Cognitive decline is a significant health concern in aging populations, with limited effective treatments.
- Serum vitamin D is a recognized biomarker, but its precise relationship with cognitive function requires further elucidation.
- Existing research has not fully established the link between vitamin D levels and cognitive performance.
Purpose of the Study:
- To investigate the causal relationship between vitamin D and cognitive function.
- To identify key indicators predicting cognitive decline in older adults.
- To determine an optimal range for vitamin D supplementation for cognitive health.
Main Methods:
- Mendelian randomization analysis using genome-wide association studies data for vitamin D and cognitive performance.
- Linear regression and smooth curve fitting with National Health and Nutrition Examination Survey data.
- Machine learning models to identify predictors of cognitive performance.
Main Results:
- A 1-unit increase in vitamin D was associated with a 6.51% reduction in cognitive decline risk (P < .001).
- The relationship between vitamin D and cognitive performance is nonlinear, with an inflection point at 79.9 nmol/L.
- Top predictors for cognitive performance identified by machine learning include vitamin D, weight, height, age, and body mass index.
Conclusions:
- A causal relationship exists between vitamin D and cognitive performance.
- 79.9 nmol/L is suggested as a potential optimal level for vitamin D supplementation in the elderly.
- Future interventions should consider multiple factors beyond vitamin D.
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