'Clean food eating' means different things to different people, but most adherents agree it entails paying more attention to where your food comes from. If the notion of eating clean sounds a little vague, that's because there's not one definition for the practice reasonable people might disagree on what it means. Additionally, not everything you'll hear or read about clean eating is backed up by scientific evidence. Nevertheless, there are a few basic principles about cleaning up your diet that most advocates can agree upon. We spoke to two food experts to learn a little more about the nebulous phrase. Clean eating isn't necessarily about weight loss, though that can be one of its effects. The current craze of eating only raw food or fresh juices for a set period of time doesn't have to be a part of a "clean" diet - nor is it medically necessary.