Is there a role for vitamin D in supporting cognitive function as we age?

Area of Science:

• Gerontology
• Neuroscience
• Public Health

Background:

• Dementia affects 46 million globally, projected to triple by 2050, posing a significant public health challenge.
• Pharmacological treatments are limited, increasing focus on preventative lifestyle strategies for cognitive health.
• Vitamin D is an emerging factor of interest for preserving cognitive function in aging populations.

Purpose of the Study:

• To review evidence on vitamin D's role in aging and cognitive health in community-dwelling older adults.
• To discuss the utility and challenges of cognitive assessments in vitamin D research.
• To explore the biological plausibility and epidemiological associations of vitamin D with brain health.

Main Methods:

• Literature review of studies investigating vitamin D and cognitive health in older adults.
• Analysis of epidemiological data on serum 25-hydroxyvitamin D (25(OH)D) levels and cognitive performance.
• Examination of animal models for biological mechanisms of vitamin D in neurodegeneration.

Main Results:

• Evidence suggests serum 25(OH)D impacts brain health, with biological plausibility from animal models.
• Epidemiological studies show associations between low 25(OH)D and poorer cognitive performance in older adults.
• An optimal 25(OH)D level for cognitive health remains undetermined, and interventional evidence is scarce.

Conclusions:

• Preventing vitamin D deficiency in older adults is a prudent strategy for brain health.
• Vitamin D may be a viable component of comprehensive lifestyle strategies for cognitive preservation.
• Further interventional research is needed to clarify the effects of vitamin D supplementation on cognitive function.