Flour treatment agents · E900–E999
E920, also known as L-cysteine hydrochloride, is a flour treatment agents food additive. Dough conditioner, often from animal sources. Skaren rates it “moderate”. It is not suitable for vegans.
What is E920?
Cysteine is a semiessential proteinogenic amino acid with the formula HS−CH2−CH(NH2)−COOH. The thiol side chain in cysteine enables the formation of disulfide bonds, and often participates in enzymatic reactions as a nucleophile. E920 sits in the E900–E999 series, which in the EU classification mainly covers glazing agents, gases and sweeteners.
What is E920 used for?
E920 belongs to the flour treatment agents group. Flour treatment agents improve the baking properties of flour.
Is E920 safe?
E920 is rated “moderate”. It is approved for use in food, but some people prefer to limit it. “Moderate” means it is approved, but is debated or something some people prefer to limit.
How E920 appears on labels
On food packaging you'll find E920 either as the number “E920” or by the name “L-cysteine hydrochloride” in the ingredient list, often after its function. Ingredients are listed in descending order by weight, so an additive near the end is present only in small amounts.
Is E920 vegan?
No, E920 is animal-derived and not suitable for vegans.
This information is for guidance only and is not medical advice.
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