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Is L-Cysteine Halal?

Also known as: E920, Cysteine, L-Cysteine hydrochloride

E920 Additive Page →
⚠ Varies by Source

Source & Ruling

SourceHalal Ruling
Human HairHaram — derived from human hair (common source, especially from China)
Duck Feathers HalalHalal — from halal-slaughtered poultry feathers
Duck Feathers Non HalalHaram — from non-halal slaughtered poultry
Synthetic FermentationHalal — produced via microbial fermentation

Detailed Explanation

L-Cysteine is an amino acid used as a dough conditioner in bread and baked goods to improve texture and reduce mixing time. Historically, most L-cysteine was derived from human hair (collected from barbershops in China) or duck/chicken feathers. Synthetic production via fermentation is increasingly common but human hair remains a significant source. It is rarely listed on bread labels in stores/bakeries.

How to Identify

Listed as 'L-cysteine', 'E920', or 'dough conditioner'. Often not listed in bakery/restaurant products. May appear in the ingredients of packaged bread.

Halal Alternatives

Commonly Found In

Related Ingredients

Varies by Source Gelatin Varies by Source Animal Rennet Varies by Source Glycerin / Glycerol Varies by Source Stearic Acid Varies by Source Magnesium Stearate

Frequently Asked Questions

Is L-Cysteine halal or haram?+
The halal status of L-Cysteine is classified as Varies by Source. L-Cysteine is an amino acid used as a dough conditioner in bread and baked goods to improve texture and reduce mixing time. Historically, most L-cysteine was derived from human hair (collected from ba...
What is L-Cysteine made from?+
L-Cysteine can come from the following sources: Human Hair, Duck Feathers Halal, Duck Feathers Non Halal, Synthetic Fermentation. L-Cysteine is an amino acid used as a dough conditioner in bread and baked goods to improve texture and reduce mixing time. Historically, most L-cyste...
What are halal alternatives to L-Cysteine?+
Halal alternatives to L-Cysteine include: Fermentation-produced L-cysteine, Other dough conditioners (ascorbic acid/E300).