Is Sorbitol (E420) Vegan?

Oral bacteria cannot ferment sorbitol into acid the way they ferment sucrose. The additive does not feed tooth decay. Dentists and dental associations have backed sugar-free gum on that basis for decades, and toothpaste uses sorbitol as both a humectant and a sweetener. The cooling sensation in mints comes from sorbitol's negative heat of solution: dissolving it absorbs heat from the tongue.

Xylitol does the same more strongly. Sorbitol also holds moisture, keeping soft cookies chewy and dried fruit pliable, and it resists crystallizing, which stops sugar-free confectionery going grainy. Diabetic ranges use it because it raises blood glucose slowly, though it is not calorie-free and portions still count.

The small intestine absorbs sorbitol slowly and incompletely. A portion of any dose travels to the colon, draws water in by osmosis, and gets fermented by gut bacteria. Bloating, wind, and loose stools follow if the dose is large enough, which for many adults means somewhere above 10 to 20 grams. EU law requires foods with more than 10 percent added polyols to carry the statement that excessive consumption may produce laxative effects.

Sugar-free gum is the classic culprit, since a packet is easy to chew through. Sorbitol is also a FODMAP, so people managing irritable bowel syndrome are usually told to limit it along with the stone fruits and pears that contain it naturally. That is a digestive consideration and has no bearing on the sourcing answer.