Is E920 halal or haram?
L-Cysteine · Dough conditioner
E920 (L-Cysteine) is generally classified as not halal. ~80% derived from human hair (typically not Islamically slaughtered if from animals); 8–10% from pig bristles. Synthetic forms exist but are rarely labeled.
What is E920?
E920, listed on labels as L-Cysteine, is a dough conditioner that strengthens dough in baking. You'll most often find it in packaged and processed foods.
Is E920 halal? The verdict
E920 is generally considered not halal. ~80% derived from human hair (typically not Islamically slaughtered if from animals); 8–10% from pig bristles. Synthetic forms exist but are rarely labeled. Avoid products that list it unless they carry credible halal certification confirming a permissible alternative source.
How to check E920 on a label
Scan the ingredient list for E920 and its other names. If it's present and the source isn't stated, treat the product as doubtful. A barcode or photo scan with Halal Food AI flags E920 automatically and tells you whether the product declares a halal source.
Other names & label terms to scan for
L-CysteineL-Cysteine hydrochlorideE920
Bottom line
E920 is not halal in its typical form — avoid unless explicitly halal-certified.
Stop guessing in the aisle
Halal Food AI flags E920 and every other suspect or not-halal additive automatically — just scan the barcode or snap the ingredient list. Plain-language verdicts, 25+ languages.