YenzoWhat is E920 (L-Cysteine)?
In Yenzo's data, E920 (INS 920) is L-Cysteine.
E920L-Cysteine
E920 is L-Cysteine. INS 920 is not in Appendix 1 of Circular 24/2019/TT-BYT, so this page does not yet state a Vietnamese rule for it.
- Code
- E920 · INS 920
In VietnamNot on Vietnam's list of permitted additivesNot on Vietnam's list of permitted additives (Circular 24/2019); it may be used only in a product whose declaration is registered with the Vietnam Food Administration
Risk level on the Yenzo Scalevery lowBased on the Open Food Facts additives taxonomy
How E920 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, flour treatment agent (920), dried onion and garlic, pepper, natural colour (160a).
flour treatment agent (920)flour treatment agent 920E920INS 920
Questions about L-Cysteine
Is E920 permitted in Vietnam?
INS 920 was not found in Appendix 1 of Circular 24/2019/TT-BYT (consolidated 09/VBHN-BYT). The page draws no conclusion on the rule for E920.
Can children and pregnant women have E920?
In the EU, Annex II, Part E of Regulation (EC) No 1333/2008 lists E920 (L-cysteine) in category 13.1.3, processed cereal-based foods and baby foods: at most 1,000 mg/kg and only for biscuits for infants and young children. The Regulation has no separate provision for pregnant women. If you have a particular health condition, ask a doctor.
Other flour treatment agents
E529Calcium oxidevery lowE924Bromates (flour treatment agent)highE924aPotassium bromatehighE927bCarbamide (urea)lowE1100Amylasevery lowE1101Protease, invertase and papainvery low
See all flour treatment agents →Updated 21 October 2026
Sources (3)
- Open Food Facts additives taxonomy (Yenzo's table cites no EFSA opinion for this code). Open Food Facts additives taxonomy, https://github.com/openfoodfacts/openfoodfacts-server/blob/main/taxonomies/additives.txt (entry en:e920)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 1
- Regulation (EC) No 1333/2008 on food additives (consolidated text of 18.08.2026), Annex II, Part E, category 13.1.3