Researchers found that long-term vitamin D3 use significantly reduced telomere shortening, a key marker of biological aging, while omega-3 supplements showed no similar effect.
By yourNEWS Media Newsroom
Daily supplementation with vitamin D3 was associated with significantly slower biological aging over four years, according to a large randomized clinical trial published in The American Journal of Clinical Nutrition, offering new evidence that the vitamin may help preserve cellular health as people age.
The study analyzed data from the VITAL trial, a long-running national research effort involving older adults in the United States. Researchers focused on telomeres—protective DNA-protein structures at the ends of chromosomes that shorten as cells divide. Accelerated telomere shortening has been linked to aging and an increased risk of chronic diseases, including cardiovascular disease, cancer, diabetes, and autoimmune disorders.
Investigators found that participants who took 2,000 international units (IU) of vitamin D3 daily experienced significantly less telomere shortening than those who did not supplement, translating to a biological aging delay of nearly three years over the four-year measurement period. By contrast, omega-3 fatty acid supplementation showed no measurable effect on telomere length.
“Telomeres keep your chromosomes stable and prevent them from degrading when cells replicate,” said Dr. JoAnn E. Manson, the study’s principal investigator and chief of preventive medicine at Brigham and Women’s Hospital. “The more they shorten, the more vulnerable DNA becomes to damage, increasing the risk of chronic diseases.”
The trial followed 1,054 adults aged 50 and older. Participants were randomly assigned to receive vitamin D3, omega-3 fatty acids, both supplements, or a placebo. Blood samples were collected at baseline and again at two- and four-year intervals to measure telomere length in white blood cells.
By the two-year mark, researchers observed a modest protective effect from vitamin D3. By year four, the difference was pronounced, with significantly slower telomere attrition in the vitamin D3 group. Omega-3 supplementation, despite its well-documented cardiovascular and anti-inflammatory benefits, did not demonstrate an effect on telomere preservation.
Researchers also observed reductions in C-reactive protein, a marker of systemic inflammation, among participants receiving vitamin D3. The finding supports the hypothesis that vitamin D’s anti-inflammatory properties may play a role in slowing cellular aging.
“This suggests that vitamin D’s ability to reduce inflammation may be key to slowing telomere shortening,” Manson said.
The researchers noted that this study is the largest and longest randomized trial to date examining the relationship between vitamin D supplementation and telomere length. While the findings are considered significant, they cautioned that additional research is needed to determine how telomere preservation translates into long-term disease prevention and longevity outcomes.
Vitamin D can be obtained through sunlight exposure, diet, and supplementation. Fatty fish, egg yolks, and fortified foods are common dietary sources, while supplementation is often recommended for individuals with limited sun exposure or low baseline vitamin D levels.
The study’s authors emphasized that the results support further investigation into vitamin D’s role in healthy aging, particularly as populations grow older and age-related diseases become more prevalent.
Watch Dr. John Campbell sharing advice on maintaining proper vitamin D levels.
This video is from the Lumiere channel on Brighteon.com.
Source: Natural News