Are you starving yourself, or are you "fasting." Fasting for short periods -- no more than a few days -- can be therapeutic. During a fast, it is important to get plenty of fluids. Consuming clear brother is a good idea, but many people consider that to be breaking the fast. One should NEVER deprive oneself completely of food for long periods, particularly merely to lose weight. Complete deprivation is NOT a legitimate weight-loss method.