Grapefruit is a type of fruit, belonging to the pomelo family, with red fruit that tastes bitter, astringent, and sour. It is also known as "Zhuluan" or "Pomelo." When ripe, the peel is generally unevenly orange or red, and the flesh is pale reddish-white. The main sources of imported grapefruit include: South Africa, Israel, and Taiwan, China.

Grapefruit should be of considerable weight, with a glossy, thin, and soft skin for the best quality. Grapefruit is very rich in vitamin C and other nutrients, and it is a fruit low in sugar, making it a staple in the diets of those looking to lose weight.