Acesulfame potassium

Additive · E 950

Acesulfame potassium, also called Ace-K, is a sweetener used in foods and drinks. It is about 200 times as sweet as sugar, so a little goes a long way. It tolerates heat and is often used with other sweeteners to balance taste.

Also known as

Acesulfame K · Ace-K · potassium acesulfame · acesulphame potassium · E 950 · INS 950

Why PRūF tracks it

Possible effects on the intestinal barrier, uncertain long-term human health associations, and impurity controls warrant attention, but laboratory experiments and observational studies do not establish that acesulfame potassium causes harm at ordinary food exposures.

Read the research

Acesulfame potassium adds sweetness in small amounts and is often combined with other sweeteners. EFSA’s 2025 assessment set an acceptable daily intake of 15 milligrams per kilogram of body weight and found estimated exposure generally below it. That assessment supports permitted uses, while leaving uncertainty about some human health findings and a possible manufacturing impurity. Newer research deserves attention: a 2026 gut-simulator experiment found that microbial products formed during exposure could affect a cultured intestinal barrier, but it did not test harm in people or reproduce normal absorption.

Observational studies also report associations with hypertension and cognitive decline; diet, health differences, and imperfect exposure measurements prevent confident attribution to Ace-K. The cognition paper has undergone corrections, so its original numerical claims need particular care. A small trial of an Ace-K/aspartame drink found no acute glucose or hormonal difference from water, which cannot establish long-term safety. Louisiana enacted removal of Ace-K from forthcoming school-food and disclosure lists before their planned operation.

Rhode Island separately excludes artificial sweeteners from specified school foods under its nutrition standards.

Research reviewed on September 5, 2026 · 12 sources