Nutrition might seem like a pretty straightforward topic, but it can quickly veer from "put food in mouth to live" to a deeply confusing place. With acronyms. And statistics. And conflicting ideologies. And just when you think you have your healthy eating journey covered, a new trendy diet comes along and knocks you off your stride. In the spirit of finding a nutritional balance that works for you, we're outlining three trendy diets, and taking into account their effect on your teeth.