Canned and frozen segments and juice are available also. Look for firm, thin skinned, well shaped fruit. The heavier they are for their size, the juicier they will be. They should be firm, yet resilient. Also choose grapefruit that have a shiny skin as opposed to a rough skin.
Rough skin indicates a dry fruit.
Avoid grapefruit with signs of decay as soft and discolored areas on the peel at the stem end, water soaked areas, loss of bright color and soft peel that breaks with finger pressure. Do not store grapefruit at room temperature for more than a day or two. They keep up to two weeks when wrapped in a plastic bag and placed in the vegetable drawer of the refrigerator. It can also be used to make a refreshing vinaigrette, a delightful stir-fry or broiled for a delicious breakfast treat. Grapefruit is used in pies, cakes, marmalades and jellies.