A British study found that as long as people drink a glass of 500ml water half an hour before each meal and stick to it for three months, they can lose 2 to 4kg  The research team invited 84 overweight adults to rent at random  41 of them were asked to drink 500ml water before meals, and the other 43 lived as usual  Three months later, the team found that the average weight of those who drank water before meals decreased by 4 3kg  The average weight loss of those who did not drink water before meals was only 0 81 kg, the researchers said
Some of the people who didn't drink water before the meal lost 4 kilograms.
 The average amount of exercise of those who did not drink water was higher than those who drank water before meals, indicating that drinking appropriate water before meals can really lose weight