The overweight person needs more water than the thin one. Larger people have larger metabolic loads. Since we know that water is the key to fat metabolism, it follows that the overweight person needs more water. Water helps to maintain proper muscle tone by giving muscles their natural ability to contract and by preventing dehydration. Again, adequate water helps flush out the waste.
Retained water shows up as excess weight.
To get rid of excess water you must drink more water. Drinking water is essential to weight loss. On the average, a person should drink eight 8-ounce glasses every day. That's about 2 quarts. However, the overweight person needs on additional glass for every 25 pounds of excess weight.