This invention discloses a method of preservation of a food product comprising the step of adding 1) a first component comprising between 10 ppm and 1% of a biocidal salt of Nα-(C1-C22) alkanoyl di-basic amino acid alkyl (C1-C22) ester cationic biocidal molecule with an anionic counterion, and 2) a second component comprising from 10 ppm to 1% by weight an acyl monoglyceride, directly to a food product. The preferred cationic biocidal molecule comprises Nα-lauroyl-L-arginine ethyl ester (“LAE”). The invention also discloses the method of preservation of a food product using salts of a Nα-(C1-C22) alkanoyl di-basic amino acid alkyl (C1-C22) ester cationic biocidal molecule and an anionic counterion with or without a monoglyceride of a fatty acid, whereby the packaging film is compounded with the salts and the optional monoglyceride of a fatty acid.