A large randomized trial has found that older adults who took a daily multivitamin for three years reported significantly better functional health than those on a placebo — meaning an easier time with everyday tasks like dressing, bathing, climbing stairs, and managing household chores. For anyone following evidence-based nutrition for older adults, the findings add a concrete, low-cost tool to the healthy aging toolkit.
What the Study Found
The research drew on data from more than 16,000 adults aged 60 and older enrolled in the COcoa Supplement and Multivitamin Outcomes Study (COSMOS) — one of the largest and longest randomized clinical trials of supplements in older populations. Participants either took a standard daily multivitamin or a matching placebo every day for three years. Those in the multivitamin group showed the clearest gains in two key areas: symptom burden (how much daily discomfort interfered with life) and overall physical functioning. As reported by ScienceDaily and the American Society for Nutrition, the researchers believe the benefits work through multiple pathways — preserving cognitive sharpness, supporting blood circulation, and maintaining physical stamina.
What It Means for Healthy Aging
The findings do not suggest that a multivitamin replaces a balanced diet or regular exercise — the researchers were careful to emphasize that. But for older adults who may have nutrient gaps due to reduced appetite, medication interactions, or limited food variety, a daily multivitamin appears to offer a measurable, low-risk buffer. The results were presented at NUTRITION 2026, the annual flagship meeting of the American Society for Nutrition (July 25–28, National Harbor, Maryland), and are considered preliminary pending full peer-reviewed publication.
What Comes Next
Researchers note the gains were modest but meaningful — the kind that can make the difference between independent living and needing assistance. Future work will examine whether specific vitamins or minerals within the multivitamin formula drive the effect, and whether the benefits persist beyond three years. For now, the COSMOS data represent the strongest long-term evidence yet that a simple, affordable daily habit can help older adults maintain functional independence.