Introduction

Nisin is a natural food preservative classified as a bacteriocin, which is a type of protein produced by certain bacteria. It is specifically derived from the fermentation of *Lactococcus lactis*, a strain of lactic acid bacteria. Nisin is renowned for its strong antibacterial properties, particularly against Gram-positive bacteria, which include various pathogens that can spoil food or cause foodborne illnesses.

Applications of Nisin

1. Dairy Products: Nisin is commonly used in cheese production to prevent the growth of spoilage organisms such as *Clostridium botulinum* and *Listeria monocytogenes*. It helps maintain the quality and safety of cheese during storage.

2. Canned Foods: In processed and canned foods, nisin helps to inhibit microbial growth, extending shelf life and ensuring that products remain safe for consumption over time.

3. Meat Products: Nisin is utilized in various meat products to inhibit the growth of harmful bacteria, thus improving food safety and preserving the sensory qualities of the meat.

4. Beverages and Sauces: It is also utilized in certain beverages and sauces to provide an additional layer of protection against spoilage.

Specification