Sweeteners
acesulfame-K causes genotoxicity
Part of: • acesulfame-K
🧭 Read this score with how it was built in mindWe re-read the papers behind these claims and corrected how each one is counted
An industry-funded narrative review had been counted as a high-quality meta-analysis, and several rows were class-level sweetener analyses that never isolated acesulfame-K. Corrected, the page holds lab, animal and modelling studies pointing both ways and no human test of DNA damage. 'Contested' here means the lab evidence disagrees, not that a human question is in dispute.
📅 Last reviewed: 2026-07-15 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: Animal studies (Animal)
How the studies fall
What the evidence shows
Contested on paper, but in truth no human test of genotoxicity exists: every counted row is in-silico, in-vitro, animal, or cancer epidemiology standing in for DNA damage.
The evidence (14)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Yan S, Yan F, Liu L, Li B, Liu S, Cui W 2022 · Nutrients | meta-analysis | tested-null | low | MA: ace-K subgroup among sweeteners with a weak Europe-only cancer signal; overall null. |
| Marchitti SA, Boon D, Jack M, Goodman JE 2025 · Adv Nutr | animal | contradicts | moderate | Narrative review (ABA-funded; authors employed by Gradient/ABA), not a meta-analysis: 'a comprehensive review of the available experimental evidence from animal and mechanistic studies'. For Ace-K: 'In vitro genotoxicity tests, including those evaluating mutagenicity, DNA damage, and DNA repair, have been negative for Ace-K'; in-vivo micronucleus studies negative except an unreplicated male-only increase in micronucleated erythrocytes (NTP: 'of uncertain biological significance'); 5 animal cancer bioassays negative. Conclusion: 'the overall weight of evidence supports the conclusion that Ace-K lacks genotoxic and carcinogenic potential.' Pools nothing; re-describes EFSA 2025 and Chappell 2020 - review, zero weight. |
| Buchner EM, Happel O, Schmidt CK, Scheurer M, Schmutz B, Kramer M, Knauer M, Gartiser S, Hollert H 2019 · Water research | in-vitro | mixed | moderate | Acesulfame ozonation products tested in micronucleus, umu, Ames-fluctuation, and comet assays: acesulfame solutions in ultrapure water showed genotoxic effects after ozonation, but the isolated/crystallized major transformation product (OP1 |
| Li H, Zhang Y, He Y, Huang J, Yao J, Zhuang X 2024 · Br J Nutr | meta-analysis | contradicts | moderate | MA of 12 observational studies: non-nutritional sweeteners as a class ('such saccharin and aspartame'), 4 studies, endometrial cancer OR 0.90 (95% CI 0.81 to 1.01). Acesulfame-K not named in the abstract; no ace-K-specific estimate. Pooled exposure, off-scope. |
| EFSA Panel on Food Additives and Flavourings (FAF), Castle L, Andreassen M, Aquilina G, Bastos ML, Boon P, Fallico B, FitzGerald R, Frutos Fernandez MJ, Grasl-Kraupp B, Gundert-Remy U, Gürtler R, Houdeau E, Kurek M, Louro H, Morales P, Passamonti S, Batke M, Bruzell E, Chipman J, Cheyns K, Crebelli R, Fortes C, Fürst P, Halldorsson T, Leblanc JC, Mirat M, Lindtner O, Mortensen A, Wright M, Barmaz S, Civitella C, Le Gall P, Mazzoli E, Rasinger JD, Rincon A, Tard A, Lodi F 2025 · EFSA journal. European Food Safety Authority | animal | contradicts | high | EFSA's 2025 re-evaluation of acesulfame K (E950) as a food additive concluded 'no safety concerns arise for genotoxicity of acesulfame K and its degradation products,' based on synthesis of systematically appraised human and animal studies |
| Shankar N, Priyanka B, Janani DV, Balaji P, Nivetha K, Vijayalakshmi J, Amshumala B, Selvan GT, Paul SFD 2026 · Molecular genetics and genomics : MGG | animal | supports | moderate | Drosophila SMART assay found dose-dependent genotoxic effects (10/30/50 mM) for Ace-K alone and in binary/ternary combos with aspartame and stevia; Ace-K-containing mixtures showed higher spot frequencies at the lowest dose (10 mM), and in |
| Pavanello S, Moretto A, La Vecchia C, Alicandro G 2023 · Regul Toxicol Pharmacol | observational | contradicts | moderate | Tox + epi review: no evidence of cancer risk associated with acesulfame-K. |
| Haighton L, Roberts A, Jonaitis T, Lynch B 2019 · Regul Toxicol Pharmacol | observational | contradicts | moderate | Quality-appraised epidemiology: no support for ace-K increasing cancer risk. |
| Zhu C, Ji D, Ma J, Da M 2024 · Oncology | meta-analysis | contradicts | moderate | MA of 10 observational studies (3 case-control, 7 cohort; 711,537 participants), artificial sweeteners as a class: 'the intake of ASs reduced the incidence of CRC (OR = 0.93, 95% CI = [0.87-0.99])'; CRC mortality OR 0.93 (0.83-1.05). Acesulfame-K not named; no ace-K-specific estimate. Pooled exposure, off-scope. |
| Okus F, Yuzbasioglu D, Unal F 2024 · Toxicology | mechanism | supports | low | Molecular docking of acesulfame potassium (ACE-K) against ATM and p53 (DNA-damage-response proteins) and DNA itself, framed around prior lab findings of genotoxic effects of ACE-K; docking scores reported for other additives but ACE-K inclu |
| Debras C, Chazelas E, Srour B, Druesne-Pecollo N, Esseddik Y, Szabo de Edelenyi F, Agaësse C, De Sa A, Lutchia R, Gigandet S, Huybrechts I, Julia C, Kesse-Guyot E, Allès B, Andreeva VA, Galan P, Hercberg S, Deschasaux-Tanguy M, Touvier M 2022 · PLoS Med | observational | tested-null | moderate | NutriNet-Santé cohort: acesulfame-K intake weakly associated with higher overall cancer risk (observational). |
| Arulanandam CD, Babu V, Soorni Y, Prathiviraj R 2025 · Toxicology research | mechanism | supports | low | In silico mutagenicity/carcinogenicity prediction (LAZAR, pKCSM, Toxtree) of 16 sugar substitutes identified four compounds, including 'Ace' (acesulfame), as predicted mutagens. |
| Xie J, Zhu Y, Yang Z, Yu Z, Yang M, Wang Q 2024 · J Transl Med | mechanism | tested-null | low | Integrative analysis of artificial sweeteners and cancer: associations inconsistent across sweeteners/sites. |
| Boon D, Marchitti SA, Colonna KJ, Chowdhury-Paulino IM, Li W, Berky A, Restrepo C, Jack M, Goodman JE 2025 · Advances in nutrition (Bethesda, Md.) | observational | contradicts | moderate | Systematic review of 90 epidemiology studies (incl. ace-K) and 17 cancer types found no consistent NSS-cancer associations and no dose-response; states experimental animal and mechanistic evidence 'does not support human-relevant carcinogen |
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