At this time, your body is undergoing fat metabolism and water is a key to keeping the body flushed and clean. Unfortunately, we live in a toxic world and when the body does not know what to do with a toxin it gets stored in our fat or adipose tissue. As these stores get turned over at a “rapid” rate on the HCG Diet Program some of this toxic load is released. A well hydrated body will flush the waste products from fat burning and also keep the cells nice and hydrated. In general, the whole body will respond to being hydrated. I have seen before and after photos of people who drank 2 liters of water for 3 months and the results were quite astonishing to me on as far as skin rejeuvenation.