Vitamin D may help turn back the body’s aging clock

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A new study published in the American Journal of Clinical Nutrition suggests that vitamin D could play a role in slowing a biological process linked to aging. Researchers found that higher levels of vitamin D may help reduce the shortening of telomeres, the protective caps on the ends of chromosomes that naturally wear down over time. Telomeres function as a kind of biological clock and shorter telomeres have been associated with a higher risk of certain diseases. While more research is needed, these findings highlight the potential of vitamin D in supporting healthy aging.

Source

Zhu, H., Manson, J. E., Cook, N. R., Bekele, B. B., Chen, L., Kane, K. J., Huang, Y., Li, W., Christen, W., Lee, I. M., & Dong, Y. (2025). Vitamin D3 and marine ω-3 fatty acids supplementation and leukocyte telomere length: 4-year findings from the VITamin D and OmegA-3 TriaL (VITAL) randomized controlled trial. The American journal of clinical nutrition, 122(1), 39–47. https://doi.org/10.1016/j.ajcnut.2025.05.003

Additional Reading

https://www.washingtonpost.com/wellness/2025/05/22/vitamin-d-aging-telomere-study/

https://news.harvard.edu/gazette/story/2025/05/vitamin-d-supplements-may-slow-biological-aging/

https://www.healthline.com/health-news/vitamin-d-supplements-may-slow-biological-aging