Digestoa
Additive · Sweetener

Mannitol (E421)

Mannitol (E421) is a sweetener that Digestoa rates as low concern — it's considered safe at the levels used in food.

Digestoa riskLow risk
TypeSweetener
Found indiet drinks, sugar-free gum and sweets, protein products and 'no added sugar' foods
ConcernsLaxative effect

What is Mannitol?

Mannitol (E421) is a sweetener — used to add sweetness without sugar.

Is Mannitol bad for you?

Mannitol is permitted in food and Digestoa rates it as low concern. There's no strong evidence it causes harm at the levels typically used in food.

What foods contain Mannitol?

Diet drinks, sugar-free gum and sweets, protein products and 'no added sugar' foods.

Digestoa's take

You don't need to avoid Mannitol. It's one of the more benign things on an ingredients list — worth knowing, not worth worrying about.

Safer swaps

Look for products sweetened with stevia (E960) or erythritol — or simply less added sweetness.

Frequently asked questions

Is E421 the same as Mannitol?
Yes — E421 is the international additive (E-number) code for Mannitol.
Is Mannitol bad for you?
Digestoa rates Mannitol (E421) as low concern. It's permitted in food and considered safe at normal dietary levels.
What are the side effects of Mannitol?
Reported concerns include: Laxative effect.
What foods contain Mannitol?
Diet drinks, sugar-free gum and sweets, protein products and 'no added sugar' foods.
How can I avoid Mannitol?
Check the ingredients list for "Mannitol" or "E421", or scan the product with Digestoa to see if it's present before you buy.

Related sweetener additives

Aspartame (E951)Sucralose (E955)Acesulfame K (E950)Cyclamate (E952)Saccharin (E954)Neotame (E961)

Risk ratings reflect Digestoa's editorial assessment synthesising EFSA/IARC opinions and peer-reviewed research. Informational only — not medical advice.