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Last reviewed July 16, 2026

Lactitol (E966)

Lactitol is a low-calorie sweetener with a dairy secret in its name. It is made from lactose, so the milk connection is not a coincidence.

Where it hides

  • Sugar-free sweets and chocolate
  • Low-calorie baked goods
  • Some laxatives and medicines

What it is

Lactitol is a sugar alcohol used to sweeten and bulk out reduced-sugar foods. Unlike most of its shelf-mates, its starting material is a dairy sugar.

Primary source 01 / 01

Lactitol is a disaccharide sugar alcohol produced from lactose.

Wikipedia encyclopedia entry Lactitol, 2025

The name is the tell

Because lactitol is manufactured from lactose, which is extracted from milk or whey, it is not vegan. If you want a sugar alcohol without the dairy origin, erythritol, xylitol, sorbitol and maltitol are all made from plant sources.

Frequently asked

Is lactitol dairy?

It is made from lactose, the sugar in milk, so it originates from dairy and is not vegan. The finished sweetener contains little to no milk protein, but its source is animal.

Which sugar alcohols are vegan?

Erythritol, xylitol, sorbitol and maltitol are typically made from plant sources such as corn or birch, so they are generally vegan. Lactitol is the milk-derived exception.

The sources

What each verdict rests on. Read them yourself.

  • Lactitol · Wikipedia, 2025 · encyclopedia overview

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