Source dependent

The source or production method of E920 can vary, so it is not always vegan.

Names you may see on a label

L-cisteínaCisteínaL-cysteinCysteinl-cysteineL-cysteine hydrochlorideL-CysteineL-2-Amino-3-mercaptopropionic acidL-Cys(R)-2-Amino-3-mercaptopropanoic acid(2R)-2-amino-3-sulfanylpropanoic acid(2R)-2-amino-3-mercaptopropanoic acidL-ЦистеинL-cysteinaCysteinaL-ЦистеїнL-Cystéine et ses chlorhydratesL-CystéineCystéineC3H7NO2SL-kysteiiniKysteiiniL-kysteiiniäKysteiiniäL-cysteïnecysteïneE 910CysteinerD-CysteinCysteinhydrochlorid-Monohydrat

How to verify it

Look for a vegan certification or a manufacturer statement identifying the original source. The ingredient name alone does not settle it.