Lactitol is a sugar alcohol used as a replacement sweetener for low calorie foods with approximately 40% of the sweetness of sugar. Lactitol is produced by two manufacturers, Danisco Sweeteners and Purac Biochem.

Lactitol is used in a variety of low calorie or low fat foods. High stability makes it popular for baking. It is used in sugar-free candies, cookies, chocolate and ice cream. Lacitol also promotes colon health as a prebiotic. Lacitol only has 2 calories per gram, compared to 4 calories per gram for typical carbohydrate.

Lactitol, sorbitol, xylitol, mannitol, and maltitol are all sugar alcohols. The United States Food and Drug Administration (FDA) classifies sugar alcohols as "generally recognized as safe" (GRAS). They are approved as food additives, and are recognized as not contributing to tooth decay or causing increases in blood glucose. Lactitol is also approved for use in foods in many other countries, including Canada, Japan, Israel, and throughout the European Union.