Maltitol is a sugar alcohol and is commonly used as a natural sugar substitute.Except for browning it has very identical properties to sucrose and has 75 - 90% sweetens of sucrose.he powdered form of maltitol has a glycemic index of 36, which is still higher when compared to other artificial sweeteners or sugar alcohols. Thus people with diabetes should keep this in mind before consuming maltitol as a sweetener or table sugar.