Thus, the condition quickly returns. Your body will only tolerate sodium in certain concentrations. The more salt you eat, the more water your system retains to dilute it. As the water is forced through the kidneys, it will remove the excess sodium. Over weight people need more water than thin people.
Larger people have larger metabolic loads.
It also helps to prevent the sagging skin that usually follows weight loss. Shrinking cells are buoyed by water which plums the skin and leaves it clear, healthy and resilient. Water helps rid the body of waste. During weight loss, the body has more waste to get rid of - all that metabolized fat must be shed. Again . . .