We've all done it: popped a multivitamin and thought "will this actually do anything?" For decades, the answer you'd typically get from health experts was a big shrug, because of a lack of solid evidence that multivitamins have a meaningful, measurable impact on our overall health or our odds of living a longer, healthier life . A study published Monday in Nature Medicine suggests that, for older adults, we might be getting closer to an affirmative nod that multivitamins do something , after it