What is E640?
E640 is Glycine, a flavour enhancer. Usually synthetic, but an animal (gelatin) source is possible.
Also written as: INS 640, E-640, E 640. INS is the international numbering system used outside Europe, including on labels in Asia, Australia and the Middle East.
What to do
Look for a halal logo, a "vegan" label, or a stated plant source on the pack. If none of these are present, you can contact the manufacturer and ask for the source.
Frequently asked questions
Is E640 halal?
E640 (Glycine) is doubtful (mushbooh). Usually synthetic, but an animal (gelatin) source is possible.
What is E640 made from?
Mostly synthetic; can be made from gelatin.
What is E640 used for?
E640 is used as a flavour enhancer, typically in crisps, instant noodles, stock cubes and ready meals.
What should I do if a product contains E640?
Look for a halal logo, a "vegan" label, or a stated plant source on the pack. If none of these are present, you can contact the manufacturer and ask for the source.
Related E-numbers
Last reviewed 2026-10-06. How we decide · Suggest a correction