What good method does He Chengyuan's patent freckle have?

Lemon juice and rock sugar: stir lemon juice and add rock sugar to drink. Lemon is rich in vitamin C.100g of lemon juice contains up to 50mg of vitamin C. In addition, it also contains calcium, phosphorus, iron and B vitamins. Drinking lemon juice regularly can not only whiten skin, prevent skin vascular aging, but also prevent arteriosclerosis.