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Polylysine is a natural substance from microbial metabolism. It is widely used as food preservative. It can inhibit the growth of Gram(+) and Gram(-) bacteria such as E. coli and Bacillus subtilis, yeast, lactic acid bacteria, Staphlacoccus aureus, ect..
Polylysine was generally recognized as safe as food preservative by FDA in October, 2003. It is widely used in food preservation. It is harmless to the body because it is automatically hysrolized into nutritive amino acid, lysine. It can be used in rice, noodles, cakes, snacks, and ice creams, salad, canned foods and meat products.
In addition, polylysine is used in SAP to produce sanitation products, such as sanitation napkin and diapers, because of its good absorption of liquid. It can also be used as a carrier for pharmaceutical molecules.