Red grapefruit and grapefruit are two varieties.

Red grapefruit: its flesh is red, mainly because of the beta-carotene and lycopene. Because beta-carotene is in the body can be converted into vitamin A, is conducive to maintaining the integrity of the epithelial cells, so, winter moderate eat more red grapefruit is conducive to the prevention of respiratory diseases. But in other nutrients content, red grapefruit and other grapefruit is not much difference.

Grapefruit is an exotic variety from the United States, also known as grapefruit, the flesh is also red. Grapefruit is rich in a variety of vitamins, especially vitamin C is rich. In addition, grapefruit is one of the few fruits that is rich in potassium and almost free of sodium, which is good for maintaining the function of the heart, blood vessels, kidneys and other organs. Therefore, grapefruit is also the best therapeutic fruit for patients with high blood pressure, heart disease and kidney disease.

Grapefruit (scientific name: Citrus maxima? (Burm) Merr.), for the Rutaceae citrus tree. The shoots, leaf backs, pedicels, calyx and ovary are pilose, the young leaves are usually dark purplish red, and the shoots are flat and angular.

Leaves rather thick, rich green, broadly ovate or elliptic; racemes, sometimes with axillary solitary flowers; buds light purplish red, sparsely creamy white; calyx irregularly 5-3-lobed; style stout and long, stigma slightly larger than ovary. Fruit globose, oblate, pyriform, or broadly conical, usually more than 10 cm in transverse diameter; seeds up to 200 or more, also seedless, irregularly shaped, usually suboblong; cotyledons milky white, monoembryonic. Fl. April-May, fr. Sept-Dec.

Graphic distribution All parts of China south of the Yangtze River, with the northernmost limits found around Xinyang and Nanyang in Henan Province, all of which are cultivated. Cultivated throughout.

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