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Doubtful — depends on source
E640 (Glycine & sodium glycinate) is an amino acid that can be produced synthetically or derived from animal protein — so it is treated as doubtful (mushbooh) unless the source is known.
Glycine is the simplest amino acid, used in small amounts as a flavour enhancer and taste modifier. It can be made synthetically or obtained from protein (which may be animal-derived).
Produced by chemical synthesis, or by hydrolysing protein — which can be plant or animal in origin. The source is rarely stated.
Glycine is doubtful because it can be synthetic (halal) or extracted from animal protein (permissible only if from a halal animal). Because the source is usually unstated, it is treated as doubtful until confirmed. Much commercial glycine is synthetic, but this should be verified.
It may be found in — this does not mean every product below contains it.
GlycineSodium glycinateE640INS number: 640
In Singapore, verify the finished product on the MUIS HalalSG register or contact the manufacturer if the source is unclear.
Check MUIS HalalSGSources: EFSA, FAO/WHO, MUIS · Last reviewed: July 2026 · This guidance is not certification.
It is doubtful (mushbooh). It can be synthetic (halal) or from animal protein (permissible only if from a halal animal). Since the source is usually unstated, verify with certification or the manufacturer.
It can be — glycine can be synthetic or obtained from animal protein. Much commercial glycine is synthetic, but confirm the source.
'Glycine', 'Sodium glycinate' or 'E640'.
Humble Halal methodology: we classify additives by their common origin, not by any specific product. A generally-halal ingredient does not make a finished product halal-certified. This page is general guidance, not certification or religious/legal advice — always verify the complete product. Last reviewed July 2026.