All in all, the analysis is a good reminder of just how confusing it can be to navigate the landscape of nutritional research. Just remember: a single study doesn't mean anything. Scientists need to reproduce the same results over and over again, in different circumstances and settings, to determine how likely something is to hold true. So stop worrying about new research praising the health benefits of wine or demonizing your favorite wheat product. Instead, stick to the things you know are healthy—and enjoy the rest in moderation.