06 Apr 2017 --- More than half of older American adults take a daily multivitamin supplement, but evidence of any clear health benefits is scarce. The Physicians' Health Study II (PHS II) remains the only randomized, large-scale, long-term trial to test whether a daily multivitamin reduced cardiovascular disease risk, and researchers found that after 11 years of follow up, there was no significant difference in risk of major cardiovascular disease (CVD) events among men who took a multivitamin compared to those that took a placebo.
