Is L-Cysteine Vegan?
It depends — L-Cysteine may or may not be vegan.
Why
L-cysteine is a dough conditioner that can be derived from duck/chicken feathers, human hair, or synthetic/plant fermentation sources. The origin is rarely labeled.
Where you'll find it
- Commercial bread
- Bagels
- Pizza dough
- Pastries
Vegan alternatives
- Synthetic (fermentation) L-cysteine
- Ascorbic acid dough conditioners
Frequently asked questions
Is E920 vegan?
It depends on the source. Feather- or hair-derived L-cysteine is not vegan; fermentation-derived is. Manufacturers must be contacted to confirm.
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