In the 1940s, Stanley Burroughs, a keen vegetarian (and committed nudist), came up with the Master Cleanse. It's a simple plan: You spend weeks consuming nothing but a cocktail of water, lemon juice, maple syrup and cayenne pepper, plus an optional daily cup of laxative tea and a glass of salt water. In recent years, it became a celebrity phenomenon. Beyoncé reportedly lost 20 pounds in 10 ...