Lemon is a dicotyledonous plant in the family Rutaceae, citrus, rich in vitamins and nutrients, and does not produce any harmful substances, so lemon can be directly brewed water to drink.

Lemon is rich in vitamin C, sugar, calcium, phosphorus, iron, vitamin B1, vitamin B2, niacin, quinic acid, citric acid, malic acid, hesperidin, naringenin, coumarin, high amount of potassium and low amount of sodium, etc., which is very beneficial to the human body. Vitamin C can maintain the body's various tissues and interstitial cell production, and maintain their normal physiological functions.