It’s the sunshine vitamin.
A new study indicates that vitamin D supplements may help slow the biological aging process by preserving telomere length. Telomeres are the protective caps at the ends of chromosomes, which naturally shorten over time and serve as indicators of biological aging. This research, published in the American Journal of Clinical Nutrition, found that individuals taking daily vitamin D3 experienced less telomere shortening over several years compared to those taking a placebo.
The study analyzed data from over 1,000 participants in a larger clinical trial involving nearly 26,000 people. Participants were randomly assigned to receive either vitamin D3 or omega-3 supplements. Those taking vitamin D3 (2,000 IU daily) showed significantly slower telomere degradation over a four-year period. In contrast, omega-3 supplements did not appear to impact telomere length.
Researchers highlighted that this is the first large-scale, long-term randomized trial to provide evidence linking vitamin D supplementation with telomere preservation. These findings build on earlier results from the same trial, which had already shown that vitamin D could reduce inflammation and lower the risk of certain age-related diseases, such as cancer and autoimmune conditions.
Despite these promising results, scientists caution against making immediate changes to vitamin D intake. They stress the need for additional research to confirm these findings before updating public health guidelines. While vitamin D may be beneficial, it is not a substitute for a healthy lifestyle that includes a balanced diet and regular exercise.
Experts suggest that targeted supplementation might be useful for people with elevated inflammation or a higher risk of chronic illness. However, they emphasize that diet and lifestyle should remain the main focus for maintaining health and preventing disease.
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