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Glycine

Also known as: E640i, E640

Low concern

Glycine is a naturally occurring amino acid recognized as safe by FDA when used in accordance with good manufacturing practice. EFSA has not flagged safety concerns at typical food use levels.

Found in

313 products

E-number

E640

What it is

Glycine is a non-essential amino acid (E640) used as a flavor enhancer and nutrient in food.

Flavor enhancer, sweetener modifier, and buffering agent.

Why it's flagged

high supplemental doses may cause GI upset

What regulators actually say

"Glycine and its monosodium salt may be safely used in foods in accordance with the following prescribed conditions."

FDA 21 CFR 170.50 — accessdata.fda.gov

"Glycine (E 640) is permitted as a flavour enhancer in the European Union."

EFSA Journal — efsa.europa.eu

Regulatory status

United States — FDA

GRAS for nutritive purposes (21 CFR 170.50)

European Union — EFSA

E640 authorized as flavor enhancer in the EU

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