Water is extremely important whether dieting or not for the human body, because it is between 50 and 70 percent composed of water. This reason makes it difficult to take in too much water for body as it will adjust to accommodate the amount of water being consumed.
The other side of this is that the body can dehydrate, and this can be dangerous for the body, including thirst, nerve cells located in the hypothalamus located at the base of the brain and other parts of the body.

The use of consuming water while dieting includes drinking water prior to eating; as this can help the stomach feel fuller, resulting in eating less. It also helps in cleaning toxins from the body and can help keep the skin clear. When dieting one of the problems that can occur from the changes in eating habits is acne, drinking water, because the body is made up of so much water can help to keep the skin clear.