Is Acesulfame potassium bad for you?
Also listed as: acesulfame K, Ace-K, INS 950, E950
Short answer
Approved as safe by food regulators within an acceptable daily intake. It adds sweetness with no calories, usually alongside other sweeteners, though long-term research on sweeteners is still ongoing.
What it is
A calorie-free sweetener about 200 times sweeter than sugar. It is often blended with sucralose or aspartame to give a more sugar-like taste.
Where you’ll see it
Diet and zero-sugar soft drinks, sugar-free sweets, protein powders, flavoured water and some yoghurts.
+ The good side
- No calories and doesn’t raise blood sugar
- Doesn’t cause tooth decay
- Stable when heated, so it’s used in baked goods
− The other side
- The WHO advises against relying on non-sugar sweeteners for weight control
- Some people notice a bitter aftertaste
- Research on long-term health effects of sweeteners is still developing
Who should pay attention
People managing diabetes or cutting sugar, and parents choosing drinks for children.
💡 What to do: Sweetened drinks are best as an occasional swap for sugary ones. Water, buttermilk and lime water are better everyday choices.
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Sucralose
Approved as safe at normal intakes and adds no calories, but the WHO advises against relying on non-sugar sweeteners for weight control.
Aspartame
Food safety experts still consider aspartame safe within the acceptable daily intake, although a WHO cancer agency labelled it ‘possibly carcinogenic’ in 2023 based on limited evidence. People with PKU must avoid it.
Stevia (steviol glycosides)
A plant-derived, zero-calorie sweetener approved as safe. It is a reasonable sugar swap, though the WHO guidance on not using sweeteners for weight control still applies.
General food information, not medical advice. Exact limits and labelling rules vary by country. If you have a medical condition or allergy, follow your doctor’s or dietitian’s advice.