Lemon is also known as lime fruit, lemon, Yimu fruit, etc. Lemon extract is extracted from the fruit of lemon or lemon in Rue family. It has the properties of boosting fluid, quenching thirst, dispelling heat and calming the fetus. Sore throat and dry mouth, abdominal distension, hypertension, myocardial infarction, do not think about the efficacy of diet. Lemon is one of the most beautiful fruits in the world. It is rich in vitamin C, sugar, calcium, phosphorus, iron, vitamin B1, vitamin B2, niacin quinic acid, citric acid, malic acid, hesperidin, naringin, coumarin, high potassium and low sodium elements, which is very beneficial to human body. Citric acid has the function of preventing and fading skin pigmentation. Lemons are rich in vitamin C and Vitamin P, which enhance blood vessel elasticity and toughness and can prevent and treat high blood pressure and myocardial infarction symptoms. Lemon is rich in vitamin C, which plays a role in human body like a natural antibiotic, with antibacterial and anti-inflammatory effects, enhancing human immunity and other effects. It also contains rich organic acids and citric acid. As a highly alkaline food, lemon has a strong antioxidant effect, which is very effective in promoting skin metabolism, delaying aging and inhibiting pigmentation.