Lemon leaves can be used to extract spices.

Lemon leaves can be used for the extraction of spices, lemon fresh fruit peel can produce lemon essential oil, lemon essential oil is both the production of high-level cosmetic important raw materials, but also the production of the treatment of stone disease medicines is an important ingredient; fruit embryo can also be the production of pectin, hesperidin (Vp), pectin is not only the production of high-grade candies, preserves, jams, and important raw materials, but also used in the production of medicines to treat gastric disease; hesperidin (VP ) is mainly used for the treatment of cardiovascular disease; fruit embryo juice can be extracted both the production of high-level drinks, but also the production of high-level fruit wine; fruit residue can be used as feed or fertilizer; seeds can be extracted from high-grade edible oil or medicine. Therefore, lemon is a treasure, is an important raw material for processing green products.

The medical effects of lemons have long been documented in ancient medical books. Ming Dynasty pharmacologist Li Shizhen's "Compendium of Materia Medica" recorded that lemon has the ability to generate fluids, quench thirst, and dispel summer heat. Lemon juice, bitter flavor, warm, non-toxic. Lu Chuan Materia Medica" says that lemon fruit, skin juice, etc. has the effect of relieving stagnation, strengthening the stomach, relieving pain, and treating stagnation and abdominal pain without thinking about food. Modern medicine believes that lemon is the prevention of cardiovascular disease medicine. Because citric acid in the body and calcium ions into a soluble complex, thereby alleviating the role of calcium ions to promote blood coagulation. Therefore, hypertension, myocardial infarction patients often drink lemon water, to improve the symptoms have great benefits.