10 Most Absurd Fad Diets

Lemonade Diet
Most of the weight you lose on a liquid diet is just water. Is faux weight loss really worth drinking cayenne pepper and maple syrup in lemon water? ©iStock/Thinkstock

Beyonce, Demi Moore, Ashton Kutcher and Eddie Vedder have all tried it -- the "cleanse" -- as a way to detoxify and (or) cut some weight. The lemonade diet, also known as the master cleanse, is a liquid weight loss plan that's supposed to wash the "toxins" and waste out of your body. This weight loss plan is severely restrictive, allowing for six (or more) servings of water mixed with lemon, maple syrup and cayenne pepper each day -- and if you feel like straying from that menu, you're allowed a salt-water flush in the morning and an herbal laxative tea in the evening.

Yes, you will lose weight on this plan, but what you're really doing is losing water weight and your healthy lean muscle mass, not the fat you were hoping would get flushed out. Followers report side effects such as irritability, fatigue and nausea.