Crystallized--or candied--ginger is created by cooking young slices of ginger root in cane sugar syrup. It has been enjoyed as a candy since the days of Marco Polo. Crystallized ginger not only has a tasty contrast of sweet and sharp flavors, it also helps the digestive process. In the seventeenth century Englishmen would have a few pieces of ginger after dinner to settle their stomachs and freshen their breath. These products contain sulfates.