The fruit of the grapefruit is round or spheroidal, with a single fruit weight of about 300 g, a total sugar content of 8.27% to 9.24%, and a total acid content of 0.52% to 1. 25%. Huyou fruit contains 18 kinds of free amino acids, containing 18 kinds of free amino acids per 100 g of juice, totaling 3 707 mg, of which the highest content of proline, followed by aspartic acid and arginine, respectively 1 034, 644 and 619 The total amount of essential amino acids in the body is 339 mg, and the content of histidine is 16.3 mg. The content of these 9 free amino acids accounts for 9.88% of the total content. The contents of K, Ca, Mg, Fe and Zn which are beneficial to human health in Huyou fruit are higher. The contents of P, K, Ca, Mg, Fe, B, Zn, Mo and Si are 231, 2 060, 265, respectively. 6,11,1. 5,2. 6,0. 4 and 134 μg·mg-1. The content of the flesh is 1.99 μg·mg -1 , and the content in the pulp is 2.16 μg·mg -1 . The nutritional quality of Huyou fruit is related to trace elements in the environment. The contents of Ca, Mg and B in soil and leaves are positively correlated with most indicators of fruit quality.

Changshan Huyou contains a lot of nutrients. According to the Nanjing Institute of Botany of the Chinese Academy of Sciences and the Zhejiang Academy of Agricultural Sciences, Huyou contains a variety of vitamins and carotene, including the amino acids required by the human body. In addition, the grapefruit is rich in iron. Phosphorus, potassium, calcium and other inorganic ingredients required by the human body.

Edible method Changshan Huyou has just slightly bitterly cut the fruit. After storage, the bitterness disappears naturally and the sweetness increases. It is generally eaten in December. When eating, use a fruit knife to make a cross on the top of the fruit, then peel. The sponge layer adhered to the outside of the capsular is removed, and then the capsular is peeled off to peel off the sac, and the flesh is eaten, brittle without slag, and cool and refreshing.