The Worst Diets Ever: Diets That Don't Work

"Eat what you want, when you want, and watch the pounds disappear!" You've heard of them, maybe even tried them: miraculous-sounding diets that claim to melt off pounds with minimal effort. There are hundreds of these quick-fix diets out there, from the grapefruit diet to the detox diet to the "caveman" diet. But how do you tell legitimate weight loss plans from diets that don't work (at least in the long run)?