... Pharmaceutical , Food and Feed Grades .Usages:1. Food grade glycine is mainly used as nutritional supplement and food additive. Keep and improve ... taste. Used as Buffering agent of beverage and liquor , as additive of juice , soy sauce , salted vegetables . Used as stabilizer ... of amino acid , as VC stabilizer .3. Feed Grade glycine is used as feed additive .4. Industrial grade glycine is mostly used ...