Oranges, whose flavor may vary from sweet to sour, are commonly peeled and eaten fresh or squeezed for juice. It also is used in certain recipes as food flavoring or garnishes. The outermost layer of the rind can be thinly grated with a zester to produce orange zest. Zest is popular in cooking because it contains oils and has a strong flavor similar to that of the orange pulp. The white part of the rind, including the pith, is a source of pectin and has nearly the same amount of vitamin C as the flesh and other nutrients.