2. Watermelon nutrition
Watermelon can be called "the king of summer", which is cool and refreshing, sweet and juicy, and is a good fruit in summer. Watermelon contains a lot of glucose, malic acid, fructose, protein amino acids, lycopene and rich vitamin C, except fat and cholesterol. It is a kind of food with high nutrition, high purity and safe eating. The sugar content of pulp is generally 5 ~ 12%, including glucose, fructose and sucrose. The sweetness increased with the increase of sucrose in the late mature stage. The sugar, protein and trace salt contained in watermelon can reduce blood fat and soften blood vessels, and it is also effective in treating cardiovascular diseases, such as hypertension. Watermelon frost is made of watermelon peel and seed shell, and can be used for treating aphtha, oral carbuncle, dental carbuncle and acute pharyngolaryngitis. Watermelon peel, pulp and seeds can be eaten and used medicinally.