E921 — L-cystine
Needs verification
E921 (L-cystine) needs verification. Closely related to E920, used in bakery.
Why it needs verification
Same source question as E920.
Where you meet it
Bread and dough improvers.
What to do in the shop
Look for a product that names the source, says plant-based or vegan, or carries a halal certificate. If nothing on the packet settles it, the manufacturer can tell you, and their answer is the only thing that turns E921 from a question into an answer.
A status here describes the additive in general — a specific product can be different. The same number can be made from plant or animal material depending on the manufacturer, and the label does not say which.
Questions people ask
Is E921 halal?
E921 (L-cystine) needs verification. Same source question as E920.
How do I know if the E921 in a product is halal?
Only the manufacturer can tell you which source they used, unless the packet says plant-based, vegan, or carries a halal certificate.
Related additives
- E920 — L-cysteine · Needs verification
- E913 — Lanolin · Needs verification
- E904 — Shellac · Needs verification
Check a product, not just a number
An additive's status describes the additive in general. What matters is the whole ingredient list on the packet in your hand.
This is information, not a fatwa. These statuses combine published scholarly positions with ingredient analysis, and they can be incomplete or out of date. For anything that matters, confirm with the manufacturer and with a qualified authority.