Guylian bars guarantee you the same delicious taste as regular premium Belgian chocolate bars because they are made with Maltitol, a healthy alternative to sugar. Maltitol is a 100% natural product derived from natural cereals. It has fewer calories than sugar, does not promote tooth decay, and could slightly raise the blood sugar, making the bars also suitable for diabetics. Blind tests have even proven that people do not notice a difference in taste, contrary to other reduced calorie sweeteners.