Vitamin D Slows Aging, May Aid Cancer Survival

Large-scale studies, including the VITAL randomized controlled trial, have found that daily supplementation with 2,000 IU of vitamin D3 can slow biological aging by reducing telomere shortening, which is linked to age-related diseases. Participants taking vitamin D experienced nearly three fewer years of biological aging compared to those on placebo. While vitamin D is widely recognized for supporting bone health and immune function, these results suggest additional benefits in protecting cellular structures and reducing inflammation. Researchers caution that vitamin D is not a cure-all, and maintaining a healthy lifestyle is crucial; most individuals can achieve adequate levels through sunlight, diet, and supplements as needed. Moderate exercise is also beneficial for preserving active vitamin D levels, particularly in periods of low sunlight. Evidence indicates vitamin D may help improve survival rates for certain cancers, such as colorectal cancer, though its preventive effect is less certain.