The function and efficacy of lemon slices: Lemon contains carbohydrates, calcium, phosphorus, iron and vitamins B1, B2, C and other nutrients. In addition, there are rich citric acid and flavonoids, volatile oil, hesperidin, etc. Citric acid has the effect of preventing and eliminating skin pigmentation. Chinese traditional Chinese medicine believes that lemon is warm, bitter in taste, non-toxic, has functions such as quenching thirst and producing fluid, expelling heat and calming the fetus, stagnation, invigorating the stomach, and relieving pain. Diuretic, regulating vascular permeability, suitable for puffy and fat mm. Smokers should eat more lemons, because they need twice as much vitamin C as non-smokers. Lemon is low in calories and has strong contractility, so it is beneficial to reduce fat and is a good medicine for weight loss. Lemon can prevent cardiovascular arteriosclerosis and reduce blood viscosity.