Daily Multivitamins May Slow Biological Aging, Harvard Study Finds

The claim that "a single vitamin pill can slow down time" may sound like an exaggeration, but new research suggests it could actually help delay biological aging.

According to a study published in Nature Medicine on the 13th, researchers at Harvard Medical School conducted a randomized clinical trial involving 958 elderly participants with an average age of approximately 70. The research team divided participants into four groups, assigning them to take daily doses of multivitamin-mineral supplements, cocoa extract, both combined, or a placebo, then tracked aging changes over two years.

The researchers measured participants' biological age using five aging indicators, including "epigenetic clocks" that analyze DNA changes in blood. While chronological age represents time elapsed since birth, biological age indicates how much cells and tissues have actually aged. Even among people who are 70, biological age can be younger or older depending on lifestyle habits and health status.

The results showed that the group taking daily multivitamin-mineral supplements for two years experienced slower aging rates on some indicators. Specifically, two epigenetic clocks showed aging rates delayed by approximately 2.6 months and 1.4 months respectively. Combined, this means that while 24 actual months passed, cells aged only about 20 months.

An interesting finding was that those with faster aging rates showed greater benefits. Participants identified at the study's start as having faster biological aging tended to show nearly double the slowdown in aging rates on some indicators.

In contrast, cocoa extract, frequently mentioned as a health supplement, showed no significant effect on aging indicators.

Howard Sesso, a preventive medicine specialist at Brigham and Women's Hospital at Harvard Medical School who led the study, emphasized that results should not be overinterpreted.

"This study does not mean multivitamins extend lifespan by four months," he explained. "It shows the possibility that the direction of health changes may trend slightly more positively."

Experts say that while this research presents interesting results, it is premature to treat multivitamins as "anti-aging drugs."

Luigi Fontana, professor of medicine and nutrition at the University of Sydney, Australia, noted: "This is a well-designed study, but the effects are very limited and were not consistent across all aging indicators. Interpretation requires caution."

Jenny Gunton, a professor at the same university, also warned: "While it is interesting that some biological markers may be delayed, some vitamins can have side effects when taken in high doses." Research has shown, for example, that excessive vitamin B6 intake can cause nerve damage.

Additional research is also needed to determine whether multivitamins actually lead to improved tissue function or reduced disease risk. This study was also limited by its relatively short two-year duration and the fact that most participants were healthy white individuals.

Experts ultimately emphasize that the key to slowing aging is not any single supplement but overall lifestyle habits. Balanced diet, exercise, adequate sleep, and chronic disease management all work together to create healthy aging.

However, multivitamins may help some elderly individuals in terms of nutritional supplementation. As people age, meal preparation can become difficult and the ability to absorb certain nutrients may decline. Vitamin B12 absorption particularly decreases with age, creating higher deficiency risk for those over 75.

The researchers also explained that "the importance of a balanced diet remains paramount," but noted that this study shows there is no reason to discontinue multivitamins for those already taking them.