Many dieters intuitively understand that water is closely connected to fat gain and loss.
And this has nothing to do with water retention and it's effect on your bathroom scale. It can do so indirectly, and there are two reasons for this. The first reason is that water is an extremely vital nutrient. It is the body's basic substance for quickly moving almost all biochemicals from wherever they may be stored to wherever they may be needed. It is equally vital for eliminating metabolic waste products to prevent poisoning.