L-cysteine
What is L-cysteine?
L-cysteine is a non-essential amino acid, meaning the body can synthesise it. It is a building block for proteins. It can be sourced from animal or plant materials, and is often produced industrially via fermentation or by extraction from natural sources like feathers or hair.
Is L-cysteine vegan?
No. L-cysteine is animal-derived, so it is not vegan.
Is L-cysteine a major allergen?
L-cysteine is not one of the 14 major allergens that must be emphasised on UK food labels.
What is L-cysteine used for?
L-cysteine is used as a dough conditioner in baking, improving the texture and workability of bread dough.
Is L-cysteine safe?
L-cysteine is authorised as a food additive in Great Britain and is listed on the Register of Food Additive Authorisations.
Why it's used
L-cysteine is used as a dough conditioner in baking, improving the texture and workability of bread dough. It can help to reduce mixing time and make dough more elastic. It is commonly found in bread, pizza bases, and other baked goods.
Health notes
L-cysteine is authorised as a food additive in Great Britain and is listed on the Register of Food Additive Authorisations. European food safety authorities (EFSA) have evaluated L-cysteine and its derivatives. JECFA has also evaluated it and set an acceptable daily intake. At typical levels of consumption in food, it is not considered to pose a health risk. Some concerns have been raised regarding the sourcing of L-cysteine, particularly if derived from human or animal hair, but regulatory bodies consider authorised sources to be safe.
Regulatory status
Authorised in Great Britain (FSA register): England, Scotland, Wales. FSA register of authorised products
Permitted uses in the EU
| Food category | Maximum level |
|---|---|
| 6.2.1 flours | No numerical limit listed |
| 13.1.3 Processed cereal-based foods and baby foods as defined by Regulation (EU) No 609/2013 | 1000 |
Allergen info
L-cysteine is not one of the 14 major allergens that must be emphasised on UK food labels. It is not derived from any of these allergens. Not a major allergen.
Foods that contain L-cysteine
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