Glycine and Sodium Glycinate

E640 is glycine and its sodium salt, a flavour enhancer used in beverages and processed foods. SANHA classifies E640 as Mushbooh and notes the source is gelatin (which is typically animal-derived from pork or non-zabīha cattle). Glycine can also be produced synthetically. No other major halal authority in the source corpus has published a per-additive position on E640. Without source disclosure the additive defaults to doubtful unless the product carries halal certification confirming a synthetic or zabīha-bovine source.