Research: Is drinking coffee good for you? A skeptical look at the studies.
SlateWe love to think that our vices are secretly good for us—that chocolate is healthy, that red wine is something of an elixir, and, most recently, that coffee can keep diseases at bay. I’ve been writing about this issue—the idea that coffee might have some wonderful health benefits— for nearly a decade now, and more research comes out but the bottom line never really changes. In many of these studies, the design is simply not robust enough to give us useful data on whether coffee is causing benefits or it’s simply that people who drink a moderate amount of coffee are on average a bit healthier in lots of ways than people who drink none or loads. These are studies where people are given coffee or a placebo and then followed up after a few weeks to see what’s happened to their health. When we actually give coffee to people in controlled clinical settings, there’s not much evidence that it has a benefit to their health.