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E101 riboflavin (vitamin B2): what it is, its sources, vegan or not

E101 is riboflavin (vitamin B2), a colour. E101 can come from fermentation or a lab. Vegan and vegetarian profiles get Fits you.

Decode another E-numberWhich E-numbers come from animals?Add vegan to my profile

By Bravoora teamUpdated Sources checked 4 sourcesHow we check

Fits you

for a vegan profile

E101=fermentation or a lab

What is E101?

E101, riboflavin (vitamin B2), is a colour, an additive that adds or restores colour in a food.

What is E101 made from?

The source is not stated on the pack: a label does not have to say which of these was used.

  • Fermentation
  • Made in a lab

Is E101 vegan?

Fits you. E101 can come from fermentation or a lab. Nothing from an animal.

Bravoora is a calorie tracker and ingredient checker app. Scan a pack, a supplement or a skincare label and it answers for each person on your plan.

What the app says to each profile, and the reason it shows.

VeganFits youE101 can come from fermentation or a lab. Nothing from an animal.
VegetarianFits youE101 can come from fermentation or a lab. Nothing from an animal.

What other names does E101 have on a label?

Any of these on a pack means E101. The checker reads them all.

E101E 101E-101INS 101Colour (101)Colour (E101)Riboflavin (vitamin B2)Vitamin B2

What would change the answer for E101?

For E101, only the ingredient list itself. A code the camera cannot read gets Needs one more scan, and the app never guesses a code it cannot see.

Sources: EU, US and Codex additive rules

Where additives are listed and approved. Bravoora reads the source and the diet; it does not rate the hazard.

  1. EU Regulation 1333/2008 on food additives (the E-number list)
  2. EU Regulation 1169/2011, Annex II: the allergen sources a label must name
  3. US FDA: Food Additive Status List
  4. FAO/WHO Codex: General Standard for Food Additives (GSFA) online

Names and classes cross-checked with Open Food Facts (Open Database License).

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