Back to catalogSafety
E920EmulsifierModerate concern
L-Cysteine
In plain words
The short version
An amino-acid dough conditioner — often derived from animal hair or feathers, creating documented vegan / halal / kosher concerns.
Why we flag it amber
It's permitted and generally considered safe, but there are a few reasons to be mindful — like sensitivities in some people, debated studies, or intake limits. The Safety section below explains the specifics.
Safety profile
ADI not specified — considered safe as a normal dietary amino acid. The safety concern is sourcing rather than the molecule: animal-sourced material is typically not declared by source on labels, conflicting with religious dietary observance and veganism.
The detail
Educational information only. Not medical or dietary advice.