Vitamin D & Aging: New Research
- New research indicates that vitamin D supplementation could play a role in slowing down the aging process.
- Telomeres, protective caps at the ends of chromosomes, tend to shorten as people age, which is linked to the development of certain diseases.
- Dr. JoAnn Manson, professor of medicine at Harvard Medical School and chief of the division of preventive medicine at Brigham and Women’s Hospital in Boston, led the trial.She...
New research reveals that vitamin D supplements may considerably slow the aging process by protecting against cellular aging.The study persistent that daily doses of vitamin D can help preserve telomeres, the protective caps on chromosomes that naturally shorten with age. This preservation translates to approximately three years of reduced aging, offering a promising new avenue for longevity. More than 1,000 adults over 50 participated in the trial,with results showing ample benefits in reducing telomere shortening.This research is part of the larger VITAL study, demonstrating vitamin D’s role in combating age-related diseases. The findings are powerful, according to experts, and highlight the importance of vitamin D. While cautioning against excessive intake, the study underscores the potential of vitamin D, as reported by News Directory 3, to help the body. Discover what’s next for the role of vitamin D in health.
Study: Vitamin D Supplements May slow Down Aging Process
Updated May 27, 2025
New research indicates that vitamin D supplementation could play a role in slowing down the aging process. A recent study published in The American Journal of Clinical nutrition suggests that daily doses of vitamin D may help protect against cellular aging and age-related diseases by preserving telomeres.
Telomeres, protective caps at the ends of chromosomes, tend to shorten as people age, which is linked to the development of certain diseases. The randomized trial involved over 1,000 adults aged 50 and older.
Dr. JoAnn Manson, professor of medicine at Harvard Medical School and chief of the division of preventive medicine at Brigham and Women’s Hospital in Boston, led the trial.She stated that the effect of vitamin D on telomere shortening was comparable to saving about three years of aging.
This analysis is part of the larger VITamin D and OmegA-3 TriaL (VITAL),which has previously demonstrated the benefits of vitamin D in reducing inflammation and lowering the risk of chronic diseases associated with aging,such as advanced cancer and autoimmune disease.
according to Manson, telomeres act like the plastic caps on shoelaces, preventing chromosomes from deteriorating during cell division. Each time cells divide, telomeres shorten, potentially leading to DNA damage and cell death if they become too short. Researchers investigated vitamin D and omega-3 fatty acids due to prior studies suggesting their potential to help maintain telomere integrity.
The study divided participants into four groups: one receiving 2,000 international units (IU) of vitamin D3 and 1 gram of omega-3 fatty acid daily; one receiving vitamin D and a placebo; one receiving omega-3 and a placebo; and one receiving two placebos. Telomere length was measured in white blood cell samples at the beginning of the study, and again after two and four years.
Results showed that vitamin D supplements substantially reduced telomere shortening over the four-year period, equivalent to preventing nearly three years of aging compared to the placebo group. Omega-3 fatty acid supplements did not show a critically important effect on telomere length.
“In terms of telomere shortening, the effect was similar to saving about three years of aging,” said Dr. JoAnn Manson, MD, MPH, DrPH.
The National Academy of Medicine recommends a daily intake of 600 IU of vitamin D for people ages 1 to 70,and 800 IU for adults ages 71 and older.The study used a higher dosage of 2,000 IU, based on previous research linking this amount to a lower risk of chronic disease without significant side effects.
However, Manson cautioned that excessive vitamin D can lead to elevated calcium levels in the blood and urine, potentially causing calcification in blood vessels and soft tissues. She emphasized that vitamin D is not a cure-all and should not replace a healthy diet and lifestyle. Foods high in vitamin D include fish, dairy products, milk alternatives, mushrooms, and orange juice.Sun exposure also aids in vitamin D synthesis.
Sue-Ellen Anderson-Haynes, a spokesperson for the Academy of Nutrition and Dietetics, described the study’s statistical results as “powerful.” She suggested future research should explore the influence of vitamin D-rich diets and sun exposure on telomeres. Anderson-Haynes noted that older adults, those taking osteoporosis medications, and individuals with conditions like Crohn’s disease may benefit more from vitamin D supplementation.
“The study really shines a light on how vitamin D can help the body,” she said. “In addition to cellular preservation, it helps in so many facets of health including the gut microbiome, mood, and sleep.”
What’s next
Further research is needed to explore the long-term effects of vitamin D supplementation on telomere length and overall health, as well as the potential benefits for specific populations.