Daijiworld Media Network – New Delhi
New Delhi, Apr 9: Vitamin D, often associated with bone strength and sunlight exposure, is now emerging as a crucial factor in long-term brain health, with new research indicating its levels in midlife can significantly influence cognitive function in later years.
A study published in Neurology Open Access has found that individuals with higher vitamin D levels in their 30s and 40s are likely to have better brain health in their 60s and 70s. The findings suggest that maintaining adequate levels early in life may help reduce the risk of neurodegenerative conditions such as Alzheimer's disease.
The research tracked nearly 800 participants over 16 years and revealed that those with sufficient vitamin D had lower levels of tau protein later in life. Tau protein, when accumulated in the brain, forms harmful tangles that damage neurons and contribute to cognitive decline and dementia.
A separate review in Clinical Nutrition Open Science noted that vitamin D supplementation can improve cognitive function, particularly among individuals who are already deficient or at risk.
Despite abundant sunlight, India is facing a widespread deficiency of vitamin D. Studies published in the Journal of Family Medicine and Primary Care indicate that nearly 70% to 90% of Indians have low vitamin D levels. Experts attribute this to factors such as darker skin pigmentation, indoor lifestyles and increasing pollution levels, which limit effective sun exposure.
Further research by the National Institute of Nutrition has also linked low vitamin D levels with poorer cognitive performance among middle-aged adults, reinforcing concerns about its long-term impact on brain health in the country.
Experts stress that the effects of vitamin D deficiency may not be immediately visible, as brain changes occur gradually over decades. The period between the 30s and 40s is considered a critical window where individuals can take preventive steps to protect cognitive health in later life.
Health professionals recommend regular testing, adequate sun exposure and medical consultation for supplementation where necessary.