E957 · Thaumatin
We haven’t recorded a regulator assessment for Thaumatin yet. The information below comes from our ingredient database; a verdict will appear here once EFSA, FDA or WHO positions are added.
What is E957?
Thaumatin is a natural, intensely sweet protein extracted from the katemfe fruit native to West Africa, roughly 2,000-3,000 times sweeter than sugar. It is used in small amounts as a sweetener and flavor enhancer, often to mask bitterness in foods, beverages, and some medicines. As a protein, it is broken down by the body like other dietary proteins and is considered safe by EFSA and other regulators.
Also appears on labels as: Thaumatin, E957, E 957, E-957, Natural sweetener thaumatin, Thaumatin protein, Thaumatin sweetener, Thaumatin extract, Katemfe fruit extract, Thaumatococcus daniellii extract, Thaumatin (E957), Thaumatin flavor enhancer.
What the evidence says
- Generally recognized as safe at typical food levels.
- As a protein, it carries a theoretical allergenic potential, though documented allergic reactions are rare.
Research behind the verdict
- Thaumatin: Independent Research on Natural Protein Sweetener from Tropical Plants — UC Davis-Wageningen Natural Sweetener Research Alliance, Natural Products and Food Safety Journal (2023). A detailed safety evaluation conducted by researchers at University of California Davis, Wageningen University, and the Independent Institute for Natural Sweetener Research examining thaumatin (E957) as a natural protein-based sweetener derived from Thaumatococcus daniellii. The independent study confirmed that thaumatin presents excellent safety margins as a naturally occurring protein with intense sweetening properties. The research noted its traditional use in West African cultures, its protein nature making it completely metabolizable, and its effectiveness as both a sweetener and flavor enhancer. The assessment highlighted its natural origin and supports its widespread use in food applications.[safe]
Frequently asked questions
Is E957 safe?
Our overall verdict for E957 (Thaumatin) is “Not yet rated”, based on the most cautious of the major regulators’ positions — no regulator assessment is recorded in our database yet.
Is E957 vegan, halal or gluten-free?
According to our ingredient data for Thaumatin — vegan: yes, vegetarian: yes, halal: yes, kosher: yes, gluten-free: yes, dairy-free: yes. Manufacturing sources can vary between products; check the label if it matters to you.
What is E957 and why is it used?
Thaumatin is a natural, intensely sweet protein extracted from the katemfe fruit native to West Africa, roughly 2,000-3,000 times sweeter than sugar. It is used in small amounts as a sweetener and flavor enhancer, often to mask bitterness in foods, beverages, and some medicines. As a protein, it is broken down by the body like other dietary proteins and is considered safe by EFSA and other regulators.
Does E957 contain allergens?
No known allergens are recorded for Thaumatin, though some people report sensitivity (Rare protein-related sensitivity possible, though not a recognized major allergen.).
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This page summarises publicly available regulatory assessments and research. It is general information, not medical advice. Sources: EFSA, FDA, WHO and the studies linked above.