Is E921 vegan? Sources and aliases

Source dependent

The source or production method of E921 can vary, so it is not always vegan.

Names you may see on a label

Monoidrato di L-cisteina cloridratoL-Cystein-Hydrochlorid-MonohydratL-cystein hydrokloridmonohydratMonohidrato de hidrocloruro de L-cisteínaL-CystineL-cysteïnehydrochloridemonohydraatMonohydrát hydrochloridu L-cysteinuL-kystiiniL-kystiiniaL-kysteiinihydrokloridimonohydraattiCystineChlorhydrate de L-cystéine monohydratéMonohydrat chlorowodorku L-cysteinyL-цистеина гидрохлорид моногидратL-cysteine hydrochloride monohydrateL-cystein hydrochlorid monohydratL-시스테인 염산염 일수화물Cloridrato de L-cisteína monohidratado

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.