Fasting on water means to eat neither solid nor liquid food and to use only water as long as the fast goes on. Many people suffering from compulsive eating have tried to solve their obesity problems by fasting. During the fast itself they feel calm without food, but there is considerable risk that the fast will have aggravated the compulsive eating problem when they start eating again.
Some people have cured illnesses by means of fasting and changing the way they eat, but when it concerns eating disorders there is a risk that they can get worse. That is why fasting is not usually recommended for this situation.
Consider why you are going on a water fasting diet. If you are trying to lose some excess fat, you probably won’t lose any real weight in the long run. Generally speaking, most of the weight that you lose during a short water fast diet is water weight. Therefore, you will gain the weight back as soon as you start eating again.

In addition, your body has built in mechanisms to protect itself against starvation. Your metabolism will start to slow down, so you will burn fewer calories. In addition, if you do not get any nutrients into your body, your body will eventually start to burn your muscles to stay alive, a highly undesirable state.
If you absolutely insist on going on a water fasting diet, consult with your doctor before you start. Certain people should never try a water fasting diet, including women who are pregnant or those who have heart conditions. In addition, if you plan on going on this type of diet for more than a few days, you will want a physician to monitor your physical condition for your protection.