gamma-Polyglutamic acid is a water soluble, biodegradable, non-toxic biopolymer produced by microbial fermentation. gamma-Polyglutamic acid is a sticky material first found in “natto”, a fermented soybean. gamma-Polyglutamic acid is an unusual anionic, naturally occurring homo polyamide that is made of D & L glutamic acid units connected by amide linkages between alpha amino & gamma carboxylic acid groups