About
Mannitol is a naturally occurring sugar alcohol (polyol) found in plants, algae, fungi, and bacteria, and is also endogenous in humans. It is used in food as a sweetener, bulking agent, humectant, and texturizer — most commonly in sugar-free confectionery, chewing gum, and low-calorie products.
Safety summary
Mannitol is GRAS in the US at intakes up to 20 g/day and broadly approved across major jurisdictions with no IARC carcinogenicity classification. At high doses it can exert a laxative/osmotic diarrhea effect common to all polyols; EU rules require a laxative warning on products with more than 10% added polyols. It is the only sweetener permitted in EU foods for infants and young children, though elevated intakes warrant caution in sensitive populations such as those with IBS or renal impairment.
Regulatory landscape
| Jurisdiction | Status | Note |
|---|---|---|
| FDA (Food and Drug Administration) (United States) | Restricted | Regulated as an interim food additive under 21 CFR 180.25 — interim status has persisted for over two decades without permanent restrictions or outright prohibition. GRAS at food-use intakes up to 20 g/day without additional labeling; products exceeding 20 g/day must carry a laxative-effect statement. Permitted as a sugar alcohol sweetener alongside sorbitol, xylitol, lactitol, erythritol, and maltitol.source |
| EFSA (European Food Safety Authority) (European Union) | Approved | Permitted quantum satis (no numerical maximum) under Regulation (EC) No 1333/2008. E421 comprises two sub-forms: E421(i) mannitol by hydrogenation and E421(ii) mannitol by fermentation. Subject to ongoing EFSA re-evaluation under the sweetener re-evaluation programme. E421 is the only sweetener specifically authorised in foods for infants and young children in the EU. Products containing >10% added polyols must carry a laxative warning label.source |
| FSSAI (Food Safety and Standards Authority of India) (India) | Approved | Permitted as a caloric/polyol sweetener under the Food Safety and Standards (Food Products Standards and Food Additives) Regulations, 2011, alongside other polyols such as sorbitol, xylitol, maltitol syrup, and lactitol.source |
Who should approach with care
Research citations
- 1FDA. 21 CFR 180.25 – Mannitol (Interim Food Additive Regulation). accessdata.fda.gov
- 2FDA. Aspartame and Other Sweeteners in Food – FDA. fda.gov
- 3other. Legal Aspects of the Food Additive Approval Process – Enhancing the Regulatory Decision-Making Approval Process (NCBI Bookshelf). ncbi.nlm.nih.gov
- 4EFSA. Protocol on Hazard Identification and Characterisation of Sweeteners authorised as food additives in the EU, 2019. efsa.europa.eu
- 5WHO. JECFA Food Additives Database: Mannitol (INS 421, CAS 69-65-8), 1996. apps.who.int
