Garcinia Lean XTreme Participating in a fad diet, like the ABC diet, may sound like a good plan initially. However, if you really want to lose weight and keep it off, it's better to stay away from dietary fads. Eating nothing but cabbage or pineapple may seem interesting at first, but you will soon grow tired of it. Fad diets do not give you a foundation on which to establish better eating patterns. The most effective diets are those that focus on teaching you how to eat a balanced diet.