Taking a daily multivitamin does not help you live longer, study finds

Many adults take daily multivitamins in hopes of bettering their health. But a new study is calling their usefulness into question.

In the study, published in JAMA Network Open Wednesday, researchers analyzed data from nearly 400,000 healthy U.S. adults followed for more than 20 years and found no association between regular multivitamin use and lower risk of death.

The study was led by researchers from National Institutes of Health's National Cancer Institute, who noted the participants studied were generally healthy, meaning more research is needed for populations with nutritional deficiencies.