Food additive · Acidity regulator / processing aid

L-cysteine

E-number
E920

An amino acid used as a dough conditioner; may be made from feathers or by fermentation.

  • Food additive
  • Expert review pending

Concern level

No concern Level 0 of 4 How concern levels work

A whole food or a benign function, with no credible concern. It never costs points. The concern level sets how many points L-cysteine costs on a product’s receipt.

Popular products that list L-cysteine

33 of the 17,000 most-scanned products in the US with a GoodSwap page list L-cysteine. The 12 most scanned:

Diets and allergens

Vegan
Yes
Vegetarian
Depends on the source
Gluten-free
Depends on the source

For the ingredient in general. Always check the package: a product’s own labels win.

Names GoodSwap recognizes on labels (9)
  • e920
  • cysteine
  • l cysteine
  • cysteine hydrochloride
  • l cysteine hydrochloride
  • flour treatment agent e920
  • l cysteine dough conditioner
  • flour treatment agent l cysteine
  • flour treatment agent l cysteine hydrochloride

Sources

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