What is E101?
E101 is Riboflavin (vitamin B2), a colour. No animal source in normal food production.
Also written as: INS 101, E-101, E 101. INS is the international numbering system used outside Europe, including on labels in Asia, Australia and the Middle East.
What to do
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Frequently asked questions
Is E101 halal?
E101 (Riboflavin (vitamin B2)) is halal. No animal source in normal food production.
What is E101 made from?
Made by fermentation or synthetically.
What is E101 used for?
E101 is used as a colour, typically in sweets, soft drinks, desserts, sauces and snacks.
What should I do if a product contains E101?
No action needed for this additive. Check the rest of the ingredient list, and remember that meat products still need proper halal slaughter.
Related E-numbers
Last reviewed 2026-10-06. How we decide · Suggest a correction