Fumaric Acid
Also listed as E297.
Acids & Acidity RegulatorsCAS: 110-17-8
This is what the ingredient is.
Fumaric acid is an organic acid occurring naturally in fumitory, bolete mushrooms, and lichen.
Here is why it shows up on the label.
It works as an acidulant, flavoring agent, and dough conditioner. Used in beverages, gelatin desserts, and baked goods.
Here is what food agencies say.
The FDA lists Fumaric Acid as Generally Recognized as Safe. Europe approves it as additive E297.
Here is what research has found.
Naturally occurring in human skin and plants. Generally well-tolerated.
Here are a few things worth knowing.
Safe for most individuals at food-additive levels. May cause mouth irritation in concentrated powder form.
Sources
- FDA GRAS
- EFSA E297
How to read this page
We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.
v1.0Updated 9/12/2026