acesulfame potassium
acesulfame potassium

Acesulfame Potassium (Ace-K)

Common names: Acesulfame K, Ace-K, Sunett®, Sweet One®, E950 (European food additive code).
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Caution
Published by Jordana Tobelem, RD, LDN — Last Updated on Apr 16, 2025
Medically reviewed by Dr. William Lin, MD
Acesulfame potassium, commonly known as Ace-K, is a calorie-free artificial sweetener approximately 200 times sweeter than sucrose (table sugar). Its stability under heat and acidic conditions makes it suitable for use in a variety of food products, including baked goods, beverages, candies, chocolates, dairy products, and desserts. Ace-K is often blended with other sweeteners to enhance sweetness and mask any aftertaste.[1]
While Ace-K is approved by health authorities such as the U.S. Food and Drug Administration (FDA) and the European Food Safety Authority (EFSA), some studies have raised concerns about its potential impact on gut microbiota and metabolism. However, these findings are not conclusive, and more research is needed to fully understand the long-term health effects of Ace-K consumption.[2]

Safety Overview

Regulatory Bodies

FDA (US)
The U.S. Food and Drug Administration (FDA) approved acesulfame potassium for use in specific food and beverage categories in 1988 and as a general-purpose sweetener and flavor enhancer in 2003, under certain conditions of use.[3]
Health Canada
Health Canada has assessed the safety of acesulfame potassium and has modified the List of Permitted Sweeteners to extend its use in various food products, including chewing gum and breath fresheners.[4]
EFSA (Europe)
The European Food Safety Authority (EFSA) has conducted safety assessments of acesulfame potassium, including evaluations of its use in foods for special medical purposes intended for young children.[5]
WHO (World Health Organization)
The World Health Organization (WHO) has evaluated acesulfame potassium and established an acceptable daily intake (ADI) for the substance, considering its safety for human consumption.[6]

FDA GRAS

U.S. Food and Drug Administration – Generally Recognized as Safe (GRAS)
Current Status
Classified

EWG Rating

Environmental Working Group
  • EWG Rating: The Environmental Working Group (EWG) assigns acesulfame potassium a low hazard score in both food and personal care products, indicating minimal concern.[7]
  • Level of Caution: EWG's assessment suggests that acesulfame potassium poses a low level of concern regarding potential health effects.
  • Possible Health Risks: While acesulfame potassium is generally considered safe, some studies have raised concerns about its potential impact on gut microbiota and metabolism.[7]
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More about Acesulfame Potassium (Ace-K)

  • Baked Goods: Sugar-free cakes, sugar-free cookies, sugar-free muffins
  • Beverages: Diet sodas, sugar-free energy drinks, flavored waters
  • Dairy Products: Sugar-free yogurt, sugar-free ice cream, sugar-free pudding

Historical Use
Acesulfame potassium, commonly known as Ace-K, was discovered in 1967 by German chemist Karl Clauss at Hoechst AG (now Nutrinova). It received approval for use in food products in the United States in 1988, initially permitted in sugar-free baked goods, chewing gum, and gelatin desserts. Its use expanded in 1998 to include soft drinks, significantly increasing consumer exposure.[3][[5]
Current Exposure
Today, Ace-K is widely used in various food and beverage products, including soft drinks, protein shakes, drink mixes, frozen desserts, baked goods, candy, gum, and tabletop sweeteners. Its inclusion in these products contributes to its prevalent consumption among individuals seeking reduced-calorie or sugar-free alternatives.[8]

Cancer Risk
Extensive studies have shown no evidence that acesulfame potassium causes cancer or other harms in humans.[9]
Metabolic Impact
Some research suggests that acesulfame potassium may alter gut microbiota and metabolism, potentially contributing to weight gain over time.[10]
Genotoxicity
Limited studies have investigated the genotoxic effects of acesulfame potassium, with some indicating potential cytotoxic effects on human liver cells.[11]
Cardiovascular Health
Recent studies have linked the consumption of acesulfame potassium to an increased risk of coronary heart disease.[12]

Toxicological Studies
Research indicates that acesulfame potassium (Ace-K) is generally recognized as safe (GRAS) by health authorities, with no significant adverse effects observed at typical consumption levels. Studies have not identified any genotoxic or carcinogenic properties associated with Ace-K.[13]
Long-Term Safety
Long-term consumption of Ace-K within established acceptable daily intake (ADI) levels is considered safe, with no evidence of adverse health effects. The ADI for Ace-K is set at 15 mg/kg body weight per day, based on extensive safety evaluations.[14]

High-Risk Groups
Children - Children may be more susceptible to the effects of artificial sweeteners like acesulfame potassium due to their lower body weight and developing metabolic systems.[15] However, studies have not conclusively linked Ace-K consumption to adverse health effects in children.[15]
Health Impacts
Pregnant Women - Limited research is available on the effects of acesulfame potassium during pregnancy.[17] While current evidence suggests it is safe within established ADI levels, caution is advised due to the lack of extensive studies.[17]

Recommended Intake
The Acceptable Daily Intake (ADI) for acesulfame potassium (Ace-K) is set at 15 milligrams per kilogram of body weight per day, as established by the U.S. Food and Drug Administration (FDA).[19]

General Safety Level
Acesulfame potassium (Ace-K) has been extensively evaluated for safety, with over 90 studies reviewed by the U.S. Food and Drug Administration (FDA) indicating no evidence of carcinogenicity or other adverse effects.[3]
Sensitive Individuals
While the FDA has not reported adverse reactions to Ace-K, some individuals may experience headaches or gastrointestinal discomfort, though such cases are rare and not well-documented in scientific literature.[20]

FAQ

What is acesulfame potassium?

Acesulfame potassium (Ace-K) is a calorie-free artificial sweetener used in beverages, baked goods, and sugar-free products.

Is acesulfame potassium bad for you?

Acesulfame potassium is considered safe by regulatory agencies, but some studies suggest potential links to metabolic effects and gut microbiome changes.

References

  1. Acesulfame potassium 2023 Wikipedia Available at: https://en.wikipedia.org/wiki/Acesulfame_potassium ↩︎
  2. Lee CY So YS Yoo SH Lee BH Seo DH 2024 Impact of artificial sweeteners and rare sugars on the gut microbiome Food Science and Biotechnology 33(7) 2047-2064 Available at: https://link.springer.com/article/10.1007/s10068-024-01597-x ↩︎
  3. US Food and Drug Administration 2023 Aspartame and Other Sweeteners in Food Available at: https://www.fda.gov/food/food-additives-petitions/aspartame-and-other-sweeteners-food ↩︎
  4. Health Canada 2011 Modification to the List of Permitted Sweeteners to Increase the Permitted Maximum Levels of Use of Acesulfame Potassium in Chewing Gum and Breath Freshener Products Available at: https://www.canada.ca/en/health-canada/services/food-nutrition/public-involvement-partnerships/modification-lists-permitted-food-additives-increase-permitted-maximum-levels-use-acesulfame-potassium-chewing-sucralose-chewing-breath.html ↩︎
  5. European Food Safety Authority EFSA 2016 Acesulfame K E 950 Extension of Use in Foods for Special Medical Purposes in Young Children EFSA Journal 14(3) 4437 Available at: https://www.efsa.europa.eu/en/efsajournal/pub/4437 ↩︎
  6. World Health Organization 1990 Acesulfame Potassium Available at: https://apps.who.int/food-additives-contaminants-jecfa-database/Home/Chemical/926 ↩︎
  7. Environmental Working Group n.d. Acesulphame Potassium EWG's Food Scores Available at: https://www.ewg.org/foodscores/ingredients/7410-AcesulphamePotassium/ ↩︎
  8. Kang HH Yun CI Choi S Oh KS Kim YJ 2022 Occurrence and risk characterization of non-nutritive sweeteners in selected food products from Korea Food Science and Biotechnology 31(1) 37-48 Available at: https://link.springer.com/article/10.1007/s10068-021-01012-9 ↩︎
  9. National Cancer Institute n.d. Artificial Sweeteners and Cancer Available at: https://www.cancer.gov/about-cancer/causes-prevention/risk/diet/artificial-sweeteners-fact-sheet ↩︎
  10. Conz A Salmona M Diomede L 2023 Effect of Non-Nutritive Sweeteners on the Gut Microbiota Nutrients 15(8):1869 Available at: https://pubmed.ncbi.nlm.nih.gov/37111090/ ↩︎
  11. Klimentova M et al. 2020 Acesulfame Potassium and Its Potential Genotoxicity Food and Chemical Toxicology 139 111243 Available at: https://link.springer.com/article/10.1134/S1062360420050069 ↩︎
  12. Kim HJ et al. 2020 Cardiovascular Effects of Artificial Sweeteners Journal of Clinical Medicine 9(5) 1495 Available at: https://link.springer.com/chapter/10.1007/978-3-319-15254-7_5 ↩︎
  13. Lohner S et al. 2017 Artificial sweeteners A systematic review of metabolic effects in humans Food Chemistry 232 1-13 Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC2951976/ ↩︎
  14. International Programme on Chemical Safety IPCS 2006 Safety Evaluation of Certain Food Additives and Contaminants Available at: https://iris.who.int/bitstream/handle/10665/43645/9789241660587_eng.pdf ↩︎
  15. Sylvetsky A Rother KI Brown R 2011 Artificial sweetener use among children epidemiology recommendations metabolic outcomes and future directions Pediatric Clinics of North America 58(6) 1467-1480 Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC3220878/ ↩︎
  16. MacDonald A et al. 2020 PKU dietary handbook to accompany PKU guidelines Orphanet Journal of Rare Diseases 15:171 Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC7329487/ ↩︎
  17. Goran MI Plows JF Ventura EE 2018 Effects of consuming sugars and alternative sweeteners during pregnancy on maternal and child health evidence for a secondhand sugar effect Proceedings of the Nutrition Society 78(3) 262-271 Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC7441786/ ↩︎
  18. Ardalan MR et al. 2017 Nephrotoxic Effect of Aspartame as an Artificial Sweetener a Brief Review Iranian Journal of Kidney Diseases 11(5) 339-343 Available at: https://pubmed.ncbi.nlm.nih.gov/29038387/ ↩︎
  19. US Food and Drug Administration FDA 2021 Safe Levels of Sweeteners Available at: https://www.fda.gov/media/168517/download ↩︎
  20. Springer 2024 Acesulfame Potassium Dictionary of Toxicology Available at: https://doi.org/10.1007/978-981-99-9283-6_15 ↩︎

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