Is Riboflavin (B2 / E101) vegan?
Vegan· E101
Riboflavin used as yellow coloring is bacterial-fermentation derived. Vegan.
Also known as: vitamin B2
What it is
Vitamin B2, produced by fermenting Ashbya gossypii or Bacillus subtilis.
Why vegan
Microbial fermentation, no animal inputs.
Where you'll find it
- Cereals
- Yellow drinks
- Cheese-style vegan products
Vegan alternatives
- N/A — already vegan
FAQ
- Is riboflavin in supplements vegan?
- Yes — modern industrial riboflavin is fermentation-derived.
Sources
Last reviewed June 4, 2026