01/15/2026
Vitamin D3 May Slow Aging
Telomeres are the protective caps at the ends of our chromosomes. Telomeres get shorter with age, and their shortening is associated with age-related diseases. A recent study randomized participants, with half receiving 2,000 IU of vitamin D3 a day and the other half receiving a placebo. Results of the study found that telomere shortening in leukocytes (a type of white blood cell) was significantly less in the vitamin D3 group than in the placebo group. Researchers estimated that this effect might be equal to about a 3-year reduction in biological aging. More study is needed to see whether the benefit applies across all ethnicities.