Quillaia extract
Soap-bark foaming agent (root beer foam).
- Category
- Emulsifiers
- Acceptable daily intake
- 5 mg/kg body weight/day (EFSA)
- Vegan
- Yes
- Vegetarian
- Yes
What it is
Quillaia extract (E999) is a natural foaming agent and emulsifier. It is rich in saponins—natural soap-like compounds that trap air and create stable foam.
How it is used in food
Make root beer’s head of foam.
Commonly found in- Ginger beer and root beer (to create the foamy head)
- Ciders and fizzy soft drinks
- Slushies and frozen beverages
Health and safety
None major at food doses.
At food doses it just makes bubbles.
Regulatory status
| Region | Status | Notes |
|---|---|---|
| Australia & New Zealand FSANZ |
Permitted | Permitted. |
| European Union EFSA / European Commission |
Permitted | Authorised for food use under EU regulations (Annex II). |
| United States FDA (Food and Drug Administration) |
Permitted | Approved. |
Identification on labels
- E-number
- E999
Also printed asQuillaja extract · Soapbark extract
How it is made
It is extracted by milling the inner bark of the Quillaja saponaria (the soapbark tree), which is native to Chile, and steeping it in water.
- Extraction — The inner bark of the soapbark tree is milled and steeped in hot water, then filtered and dried.
Worth knowing
Extract of the Chilean soap-bark tree, whose natural saponins also act as a vaccine adjuvant.
Conclusion
A rare and specific additive, E999 is highly valued in the beverage industry for its ability to create a thick, appealing foam on drinks that wouldn't normally hold a head.
References
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Open the appEntry last reviewed 2026-07-28.
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