Watch
E957 — Thaumatin
Sweetener
E957 (Thaumatin), a sweetener, is rated "watch": fine in moderation. An intensely sweet protein from the katemfe fruit, roughly 2000x sweeter than sugar. Considered safe at the tiny amounts used; Yuka moved it from green to yellow in 03/2023.
Why it's rated “watch”
An intensely sweet protein from the katemfe fruit, roughly 2000x sweeter than sugar. Considered safe at the tiny amounts used; Yuka moved it from green to yellow in 03/2023.
Risk rating: Watch
Mixed evidence or a specific concern (gut, allergy, or contested safety data). Not alarming, but worth keeping an eye on rather than eating without limit.
Frequently asked questions
Is E957 (Thaumatin) safe?
An intensely sweet protein from the katemfe fruit, roughly 2000x sweeter than sugar. Considered safe at the tiny amounts used; Yuka moved it from green to yellow in 03/2023.
What are other names for E957?
E957 is also known as thaumatin.