Nisin is a natural food preservative with high efficiency, non-toxicity, safety and no side effects, and has good solubility and stability. It can effectively inhibit the growth and reproduction of many Gram-positive bacteria that cause food decay, especially for thermostable Bacillus, Clostridium botulinum and Listeria.
Natamycin has a strong inhibitory effect on molds, yeasts and fungi, but has no inhibitory effect on bacteria, viruses and other microorganisms. It is widely used in cheese, meat products, pastries, juices and other foods worldwide.