1, low-calorie ingredients can be used. Onion water has no satiety, and a single food can't guarantee the overall nutritional intake of human body, so when drinking onion water, you can add some other low-calorie foods, such as honey, cucumber, bitter gourd, packaging materials, apples and so on.

2. Onion has low calorie and contains quercetin, prostaglandin A, potassium, vitamin C, folic acid, zinc, selenium, cellulose and other substances, which can enhance human metabolism and help reduce blood lipid and blood pressure, so it is effective in promoting fat burning after eating.