This small, lemon-shaped citrus fruit has a thin green skin and a juicy, pale green pulp. Limes grow in tropical and subtropical climes such as Mexico, California, Florida and the Caribbean. Because they're an excellent source of vitamin C, limes were fed to British sailors as a scurvy preventative (the fact that was the springboard for the pejorative nickname "limey"). The two main varieties are the Persian lime (the most widely available in the United States) and the Key lime from Florida. This food is very low in Saturated Fat, Cholesterol and Sodium. It is also a good source of Potassium, and a very good source of Vitamin C. A large portion of the calories in this food come from sugars.