Citrus fruits vary in their amount of sourness. Lemons and limes are very sour and it's difficult to eat lemons or limes by themselves. Grapefruits are less sour, but it's common to serve grapefruits with a bit of sugar. Oranges and tangerines are very sweet.
Selecting and Storing Citrus Fruit
Citrus fruits should be firm and feel slightly heavy for their size. They can be stored at room temperature as long as the peelings are intact. Once they're peeled or sliced, the flesh should be stored in the refrigerator.Oranges can be eaten alone by removing the peels and separating the sections. Grapefruit can also be prepared this way, but they may need some sugar or other sweetener for people who don't appreciate their sour flavor. You can also use oranges and grapefruit in recipes or serve their juice as beverages. Note that when you buy grapefruit juice it usually has added sugar or other sweetener.
Nutrition Information
One medium sized orange has 70 milligrams vitamin C, 39 micrograms folate, 52 milligrams calcium, 169 micrograms lutein and 3.1 grams fiber. One orange also has about 60 calories.One-half of a medium sized grapefruit has 178 milligrams potassium, 44 milligrams vitamin C, 1187 International Units vitamin A and 1453 micrograms lycopene. One-half grapefruit also has 1.4 grams fiber and 41 calories (without added sugar).
Sources:
USDA National Nutrient Database for Standard Reference. "Oranges, raw, all commercial varieties." Accessed April 27, 2011. http://www.nal.usda.gov/fnic/foodcomp/search/index.html.
USDA National Nutrient Database for Standard Reference. Grapefruit, raw, pink and red and white, all areas." Accessed April 27, 2011. http://www.nal.usda.gov/fnic/foodcomp/search/index.html.
