Most people rely on caffeine to stay alert. But researchers suggest that it may do far more—lowering the risk of Parkinson’s disease and gallstones, for example. Here’s what you may not know about the times that caffeine is good for you.
* This information does not apply to women who are pregnant (or trying to become pregnant) or to children. Nor does it apply to caffeine powder or highly concentrated liquid caffeine, which can be lethal.