By definition, a diet is something you undertake for weight loss. A diet will require you to alter your food choices and consumption. Most of the diets have either lots of fibers, or steamed vegetables, and very little or practically no room for carbohydrates. Although it might make you feel light, it certainly induces a series of side effects. These may vary from severe head aches, to black outs, to low mental balances to even desperate carbohydrate cravings — to something as serious as heart failure and death.