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Leucine
Leucine
Also known as: E641, L-Leucine
Low concern
L-Leucine is an essential amino acid required for human nutrition. As a food additive (E641) it has been reviewed without significant safety concerns at typical use levels.
Found in
560 products
E-number
E641
What it is
L-Leucine (E641), an essential branched-chain amino acid used as a flavor enhancer and processing aid.
Flavoring/processing aid; nutritional supplement (essential amino acid).
What regulators actually say
"The food additive amino acids may be safely used as nutrients added to foods... L-Leucine."
Regulatory status
United States — FDA
GRAS as a nutrient (21 CFR 172.320 - amino acids)
European Union — EFSA
Approved amino acid
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