Grapefruit (Scientific name: Citrus paradisi Macf.) is a genus of citrus genus, a small tree with slightly drooping branches and no hair. The leaf shape and texture are similar to those of grapefruit leaves, but generally smaller, the wings are narrower and shorter, and the midribs of the young leaves are short and fine. Racemes, sparse or single-flowered; calyx glabrous; petals slightly smaller than pomelo. Fruit oblate to round, smaller than pomelo, thin skin, fruity, cottony, fleshy yellow or pink, tender, juicy, refreshing, slightly aroma, slightly acidic, individual varieties have both bitter And tingling; less or no seeds, multiple embryos. The fruit period is from October to November.

Wild grapefruit originated in Central America. It was first discovered in Barbados, South America in about 1750. It was introduced to the United States in 1880 and introduced to China around 1940. China, Taiwan, Guangdong, Fujian, Zhejiang, Jiangxi, Hunan, Sichuan, Chongqing, Guangxi, Hainan and Yunnan have introduced and cultivated. [1-2] It has strong ecological adaptability, suitable for arid desert sandy soil, and suitable for humid subtropical climate. It is also cold-tolerant and resistant to barrenness.

Grapefruit is also called grapefruit and Zhu Xi. Because the fruit is dense when clustered, it is clustered, like grapes hanging in chains, so it is called grapefruit. It is an evergreen arbor tree of the citrus subfamily of the genus Rutaceae. It has a clan relationship with mandarin, orange, and orange, and has a close blood relationship with pomelo. It is one of the four major citrus groups (sweet orange, broad-skin citrus, lemon, grapefruit and pomelo) and is one of the most popular beverages in the upper class in western developed countries.

Grapefruit is rich in vitamin C, soluble cellulose and valuable natural vitamin P. Vitamin C can participate in the synthesis of human collagen protein, which has the effects of eliminating fatigue, helping digestion, quenching thirst, losing weight and maintaining skin. It can also promote the production of antibodies to enhance the detoxification function of the body. Vitamin P enhances the function of the skin and pores and is beneficial to the health and beauty of the skin. At the same time, it also has the effect of clearing heat, which is beneficial to improve the permeability and vulnerability of blood vessels. [2] 

Calcium and iron are important minerals necessary to maintain normal metabolism in the body. Grapefruit helps in the absorption of calcium and iron. Folic acid is a substance that is needed by pregnant women. Grapefruit contains natural folic acid, which can prevent women who take birth control pills and anemia in pregnant women. The acidic substance of grapefruit promotes the increase of digestive juice, enhances digestion and makes nutrients easy to absorb.