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VitaPro® Nisin is a natural antibacterial food and dairy preservative produced by the fermentation of lactic acid bacterium, Lactococcus lactis. VitaPro® Nisin inhibits the growth of a wide range of gram positive bacteria and pathogenic bacteria, and is particularly effective against some heat resistant spore-forming bacteria.

In the United States nisin is permitted in pasteurized cheese spreads and pasteurized processed cheese spreads.