YenzoWhat is E101 (riboflavin)?
It is riboflavin, also known as vitamin B2, and its salt forms (INS 101(i), 101(ii), 101(iii)). In food it is a colour that gives a yellow shade; riboflavin is also added as a vitamin.
E101Riboflavins
E101 is riboflavin, also known as vitamin B2, and its salt forms. In food it gives a yellow colour; riboflavin is also added as a vitamin.
Did you know? Circular 24/2019/TT-BYT lists riboflavin in three forms: synthetic riboflavin (INS 101(i)), riboflavin 5'-phosphate sodium (101(ii)) and riboflavin from the bacterium Bacillus subtilis (101(iii)).
- Code
- E101 · INS 101
- Group
- Colour
In Vietnam✓ PermittedOn the list of permitted additives — Circular 24/2019, Appendix 1
Risk level on the Yenzo Scalevery low?Based on the Open Food Facts additives taxonomy
How E101 appears on labels
IngredientsIllustrative example
Wheat flour, vegetable oil, salt, sugar, colour (101), dried onion and garlic, pepper, natural colour (160a).
colour (101)colour 101E101INS 101
INS sub-codes
INS 101(i)Riboflavin, synthetic
INS 101(ii)Riboflavin 5'-phosphate sodium
INS 101(iii)Riboflavin from Bacillus subtilis
Sources: Codex CXG 36-1989, Class Names and the International Numbering System (INS)
Riboflavins in food
Non-alcoholic drinksHard and soft candyChewing gumEdible ices and fruit ice creamBaked goodsPotato and cereal snacksCooked noodles and pastaDipping sauces and sauces
Questions about riboflavins
Is riboflavin (E 101) harmful?
In 2013 EFSA did not set an ADI for riboflavin (E 101(i)) and riboflavin-5'-phosphate sodium (E 101(ii)) because long-term studies and reproductive and developmental studies were missing. EFSA concluded that, despite uncertainties in the database, the two are unlikely to be of safety concern at the currently authorised uses and use levels as food additives. EFSA also noted that their use as additives gives an exposure above that from the regular diet.
Is E101 permitted in Vietnam?
Yes. Riboflavin (INS 101(i), 101(ii), 101(iii)) is listed in Appendix 1 of Circular 24/2019/TT-BYT, the list of additives permitted in food, with the function colour.
Other colours
E100Curcuminvery lowE102TartrazinemoderateE103AlkanninhighE104Quinoline yellowmoderateE110Sunset yellow FCFmoderateE120Cochineal, carminic acid, carmineslow
See all colours →Found in these products
Ngũ cốc Kellogg's Corn FlakesKellogg's · cereals and oats
Mì Samyang Buldak vị gà cay sốt rosé (rosé hot chicken ramen)Samyang · instant noodles
Mì xào Samyang vị gà cay (spicy chicken stir-fried ramen)Samyang · instant noodles
Mì ramen Vifon vị nước tương (soy sauce ramen)Vifon · instant noodlesMì ramen HO-YA vị gà (golden chicken ramen)HO-YA · instant noodlesUpdated 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:e101)
- Thông tư 24/2019/TT-BYT (văn bản hợp nhất 09/VBHN-BYT), Phụ lục 1, dòng 3-5 (INS 101(i), 101(ii), 101(iii))
- EFSA Journal (2013). Scientific Opinion on the re-evaluation of riboflavin (E 101(i)) and riboflavin-5'-phosphate sodium (E 101(ii)) as food additives