Can a simple daily pill help older adults preserve their everyday independence? A new analysis of more than 16,000 participants presented at NUTRITION 2026 reveals that adults over 60 who took a daily multivitamin reported significantly better functional health and fewer physical limitations after three years compared to a placebo group.
The COSMOS Trial Shifts Focus to Daily Functioning
Large nutritional trials traditionally measure success by tracking whether a supplement prevents major diseases like cancer or heart attacks. A new analysis of the Cocoa Supplement Multivitamins Outcomes Study (COSMOS) shifts that lens toward how older adults actually experience daily life.
Researchers evaluated data from more than 16,000 participants aged 60 and older who were randomly assigned to receive a daily multivitamin, a cocoa extract supplement, both, or a placebo.
After three years of supplementation, participants taking the multivitamin reported significantly better functional health scores than those receiving the placebo. Investigators used the Kansas City Cardiomyopathy Questionnaire—originally designed for heart patients—to measure symptom burdens such as fatigue, shortness of breath, and foot swelling, alongside practical capabilities like dressing, bathing, and climbing stairs.
“What makes this work unique is our focus on functional health, how people actually feel and function in their daily lives — rather than just the prevention of major diseases.”
Bayu B. Bekele, postdoctoral fellow at the Georgia Prevention Institute of the Medical College of Georgia at Augusta University
Narrowing Arteries and Clearer Benefits Among Vulnerable Groups
While the overall population saw modest improvements, the most striking differences emerged among participants with specific pre-existing cardiovascular conditions. According to research author Yanbin Dong, patients with carotid stenosis—a narrowing of the main blood vessels carrying blood to the brain—experienced substantial gains.
By contrast, improvements across the broader study cohort averaged 0.45 points for symptom burden and 0.30 points for the clinical summary score.
“This means those who had a history of carotid stenosis and took multivitamin minerals will have a small clinical benefit of improving cardiovascular and functional health over time.”
Yanbin Dong, cardiologist and director of the Georgia Prevention Institute of the Medical College of Georgia at Augusta University
Weighing Cocoa Extract and Expert Cautions
The study also evaluated the effects of cocoa extract supplements across the participant pool.
“Individuals still consume their usual food during these studies, so the multivitamins are adding more nutrients into the diet above and beyond the usual nutrient intake.”
Sarah L. Booth, director of the Human Nutrition Research Center on Aging at Tufts University
Because the findings were presented at NUTRITION 2026—the annual meeting of the American Society for Nutrition—they have not yet completed the rigorous peer-review process required for journal publication.
Guidance for Older Adults Considering Supplements
As older adults weigh whether to add a daily supplement to their routines, medical professionals stress that vitamins should complement, rather than replace, healthy lifestyle habits.
“For older adults, these findings suggest that a daily multivitamin could be a helpful, low-risk addition to a healthy lifestyle to support physical well-being as they age, although it is not a substitute for a good diet or exercise.”
Bayu B. Bekele, postdoctoral fellow at the Georgia Prevention Institute
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