A new wave of research is uncovering how vitamin D may do more than support bone strength — it could actually slow down cellular aging. A sub-study from the major VITAL clinical trial has revealed that consistent vitamin D3 supplementation might help preserve the length of telomeres, one of the body’s most recognized biological aging markers.
The Study: Vitamin D’s Role in Cellular Longevity
This finding stems from the VITAL (Vitamin D and Omega-3 Trial) study, a well-respected, multi-year clinical trial involving over 1,000 adults aged 50 and above. Participants were randomly assigned to receive 2,000 IU of vitamin D3 daily, omega-3 fatty acids, both, or a placebo over four years.
Researchers, including Dr. Haidong Zhu and colleagues, tracked the participants’ white blood cell (leukocyte) telomere length — a surrogate for biological aging — at the two-year and four-year marks.
