Daily Multivitamin Use Linked to Slower Biological Aging in New Research
A groundbreaking study published in Nature Medicine suggests that taking a daily multivitamin for two years may modestly slow biological aging in older adults. The research, conducted by a team of U.S. scientists with partial funding from Mars, indicates that participants who consumed multivitamins daily experienced a slowdown in two out of five epigenetic aging markers compared to those given a placebo.
Understanding Biological vs. Chronological Age
While chronological age simply measures how long a person has lived, biological age reflects the actual condition of the body's cells and systems. Researchers estimate biological aging through DNA methylation patterns—chemical modifications to DNA that accumulate over time and influence gene function. The theory suggests that slowing biological aging could potentially delay age-related diseases and extend healthy lifespan.
"Ultimately, it is critical to determine the clinical relevance of our findings," the study authors emphasized in their published report.
Study Design and Key Findings
The research involved 958 healthy participants with an average age of approximately 70 years. They were divided into four groups:
- Daily cocoa extract plus multivitamin
- Daily cocoa extract plus multivitamin placebo
- Daily cocoa extract placebo plus multivitamin
- Two placebos daily
Blood samples collected at the study's beginning and after one and two years revealed that participants taking daily multivitamins showed reduced biological aging on two epigenetic clocks—particularly those used to estimate mortality risk. After adjusting for age, sex, and baseline measures, researchers calculated this slowdown equated to approximately four months less biological aging over the two-year period.
Cautious Interpretation and Expert Perspectives
Dr. Howard Sesso, epidemiologist at Mass General Brigham and senior author of the study, cautioned against overinterpreting the results. "There are no known risks for taking a multivitamin in our two large clinical trials. At the same time, we do not know for sure who benefits, and how," he explained.
The findings contrast with a large study published last year that found daily multivitamins didn't extend lifespan and might increase early death risk. However, Sesso's previous research has suggested multivitamins could improve cognition and reduce lung cancer and cataract risks.
Independent experts expressed measured responses to the new findings. Dr. Marco Di Antonio, a biological aging expert at Imperial College London not involved in the study, noted: "I do not think that people should start taking multivitamins daily [necessarily] but these results demonstrate that having a healthy diet and lifestyle will have an effect on your biological age."
Important Limitations and Future Research
The study revealed several important nuances:
- Effects appeared stronger in participants with faster biological aging at the study's start, possibly due to greater initial nutritional deficiencies
- Cocoa extract showed no impact on biological aging markers
- The connection between epigenetic clock changes and actual health benefits remains uncertain
Experts from Columbia University's Mailman School of Public Health, commenting in an accompanying article, agreed the effects were very small and stressed the need for further research to determine whether these modest changes translate to meaningful clinical improvements.
Di Antonio added an important caveat: "Taking multivitamins daily will be pointless if there is not a healthy lifestyle associated with it, as bad habits will have a negative impact on aging too that won't be reverted by multivitamins."
The research team emphasized that while their findings are intriguing, more work is needed to explore whether multivitamins' modest effects on biological aging markers actually correlate with improved health outcomes in older adults.
