2. If drinking water directly after meals is not conducive to weight loss, drinking water after meals is easy to dilute gastric acid and affect digestion. If you are too obese, you can eat some foods or fruits and vegetables with low fat content, take an active part in physical exercise and stick to it for a long time. Can effectively lose weight. The human body is mainly composed of water. Drinking more water can also increase muscle content and reduce fat content, especially before meals. Drinking water before meals will support the stomach space, reduce hunger, reduce appetite and achieve the purpose of losing weight.