Question: how much can drinking water help you lose weight?
Answer: Observational studies have shown that people who drink mostly water have up to a 9% (or 200 calories) lower calorie intake, on average ( 16 , 17 ). Drinking water may also help prevent long-term weight gain. In general, the average person gains about 1.45 kg (3.2 lbs) every 4 years ( 18 ).