Lemon juice promotes hydration by enhancing water flavor which can make you drink more. It's a good source of vitamin C and antioxidants with one lemon containing about 31mg of vitamin C. This may help prevent cold and reduce risk of heart disease. Drinking lemon water improves skin quality, aids weightloss and help control high blood pressure. It may lower cholesterol and it's good for digestive health. The citric acid in lemon juice may help prevent kidney stones.