The grapefruit is a fruit with a spherical shape, slightly flattened, with a pale yellow or reddish smooth or rough skin. ... The flesh is yellow except in the reddish varieties, that range from pink to red and have a sweeter taste. Its English name, Grapefruit, makes reference to the fact that the fruits grow in clusters.

As a source of vitamin C, the grapefruit is exceeded among common fruits only by the orange and lemon.