Among more than 16,000 adults 60 and older, those taking a multivitamin for three years reported modestly better functional health — fewer symptoms and better day-to-day abilities.

Few health habits are as common, or as debated, as the daily multivitamin. Millions of older adults take one, yet large studies have often struggled to show clear benefits for hard outcomes such as heart attacks or cancer. A new analysis takes a different tack. Instead of asking whether multivitamins prevent disease, it asks whether they help people feel and function better in their daily lives.

The answer, according to research presented at NUTRITION 2026, the annual meeting of the American Society for Nutrition, appears to be a modest but meaningful yes.

A question of everyday function

The study was presented by Bayu B. Bekele, PhD, a postdoctoral fellow at the Georgia Prevention Institute at the Medical College of Georgia at Augusta University, working with senior investigator Yanbin Dong, MD, PhD.

“What makes this work unique is our focus on functional health, how people actually feel and function,” Bekele said.

That focus matters for older adults, for whom the ability to carry out daily activities — walking, climbing stairs, doing household tasks without exhaustion — often shapes quality of life more than any single diagnosis.

Drawing on a large trial

The researchers analyzed data from the COcoa Supplement and Multivitamin Outcomes Study, or COSMOS, a large randomized trial. More than 16,000 people aged 60 and older were randomly assigned to take a daily multivitamin, a cocoa extract supplement, both, or neither. Placebos were used for the control group and for participants taking only one of the two supplements, so that no one knew which they were receiving.

After three years, the team assessed functional health using the Kansas City Cardiomyopathy Questionnaire, a standardized tool originally developed for heart patients that measures symptoms such as fatigue and breathlessness alongside physical limitations and quality of life.

Better scores with multivitamins

Participants taking the multivitamin had significantly better functional health scores than those taking placebo. The largest differences appeared in symptom burden and in the clinical summary score, which combines measures of symptoms and physical ability.

The researchers suggest a few possible explanations. Multivitamins may help preserve cognitive abilities and may benefit blood circulation and physical stamina, all of which feed into how capable a person feels day to day.

“Multivitamin use supporting heart health and overall physical function may help maintain the ability” of older adults to stay active and independent, Bekele said. “These benefits may be particularly relevant for individuals experiencing fatigue, shortness of breath” and similar symptoms.

Cocoa: a narrower benefit

The cocoa extract told a different story. Overall, it did not significantly change functional health scores. But among participants with congestive heart failure, cocoa extract provided a significant benefit — a finding that, if confirmed, could point toward a targeted use for the supplement in a group with particularly high symptom burden.

Helpful, not magic

Bekele was careful to frame the findings in proportion. “For older adults, these findings suggest that a daily multivitamin could be a helpful, low-risk addition” to a healthy lifestyle, he said — but not a replacement for one. A multivitamin is not a substitute for a good diet or regular exercise.

Several caveats apply. The results were presented as a conference abstract, which was selected by an expert committee but has not yet undergone the full peer review required for journal publication, so the findings should be considered preliminary. The benefits described were modest. And because functional health was measured with a questionnaire, the outcomes reflect how participants reported feeling rather than objective physical tests.

Anyone considering a new supplement should check with a doctor first, particularly older adults who take other medications.

Still, the analysis adds a useful dimension to a long-running debate. Earlier COSMOS findings had already hinted that multivitamins might support memory and cognition in older adults. If the new results hold up, the humble daily pill may offer something many older people value most: the ability to keep doing the things they want to do.

The research was funded by the National Heart, Lung, and Blood Institute of the National Institutes of Health.

Featured image: Photo by Anna Shvets on Pexels.com

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Notes

1. Bekele, B. B., et al. Multivitamin and cocoa extract supplementation and functional health in older adults: an analysis of the COSMOS trial. Oral presentation, NUTRITION 2026, American Society for Nutrition, National Harbor, Md., July 27, 2026. (Conference abstract; not yet peer reviewed.)
2. American Society for Nutrition. “A daily multivitamin may help older adults maintain functional health.” News release via EurekAlert!, July 27, 2026. https://www.eurekalert.org/news-releases/1136435