Nisin microbial source

In view of the safety of synthetic food preservatives and other defects , humans are exploring safer, more convenient Ethyl lactate  atural food preservative. Microbial sources such as nisin , natamycin , red yeast rice and other elements ; animal origin lysozyme , chitosan, buffered lactic acid , propolis ; plant source agar oligosaccharides, Eucommia vegetarian , spice , lilac , plum extract ; microbial, animal and plant sources combined R- polysaccharide.