"Botanists believe this fruit was the result of a natural cross breeding between an orange and the pummelo.- The fruit was given the name grapefruit because of how it grows - in hanging clusters like grapes!- The grapefruit is a great source of Vitamin C.- Grapefruit is available all year but best between January and May.- Salt will make a grapefruit taste sweeter.- A grapefruit is 75% juice.- Gra" . . . .