Foods Containing E641 (L-Leucine)
E641 (L-Leucine) is a flavour enhancer (fermentation or animal) used in crisps and snack foods, instant noodles. Here are the foods where you'll find it on the label.
Common foods that contain E641
- crisps and snack foods
- instant noodles
- soups
- sauces
- processed meats
- ready meals
In the UK and EU, E641 must be declared either as "E641" or as "L-Leucine" in the ingredients list.
Is E641 safe?
EFSA has reviewed E641 and considers it safe for human consumption at the levels used in food. No credible evidence links L-Leucine to harm at normal dietary intakes.
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Reduce or replace E641
Products relevant to E641 and your dietary choices
MSG-Free Seasoning
Natural umami seasonings — yeast flakes, seaweed, herbs — without E6xx.
Natural Flavour Blends
Stock, seasoning blends and umami without synthetic enhancers.
Food Sensitivity Test
Check which flavour enhancers or additives are affecting you.
Frequently asked questions
What foods contain E641?
E641 (L-Leucine) is commonly found in crisps and snack foods, instant noodles, soups, sauces, processed meats. It must be declared on UK/EU labels as either "E641" or "L-Leucine".
Is E641 safe?
EFSA has reviewed E641 and considers it safe for human consumption at the levels used in food. No credible evidence links L-Leucine to harm at normal dietary intakes.
Is E641 vegan?
E641 source varies: fermentation or animal. Cannot be confirmed vegan without manufacturer verification.
Data: Open Food Facts (ODbL) · EFSA