Is Cysteine Hydrochloride vegan?

Cysteine Hydrochloride

Unconfirmed

L-cysteine hydrochloride is the hydrochloride salt of L-cysteine, produced from L-cysteine by reaction with hydrochloric acid. It shares the same origins as L-cysteine (animal hair/feathers or synthetic) and is used as a dough conditioner and in pharmaceutical and cosmetic applications.

Also known as Cysteine HCl, L-Cysteine HCl, L-Cysteine Hydrochloride, L-Cysteine Monohydrochloride
E number E920
CAS number 52-89-1
Last reviewed 16 April 2026

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