Our company, Lanzhou Weiri Bio-Engineering Co.,Ltd., is one of the leading manufacturers and exporters of natural food preservatives (NISIN and NATAMYCIN) in China, which are extracted from soybean by physical technics without any organic solvent. They are of high quality and really green products. NISIN and NATAMYCIN are widely used in the fields of dairy products, beverage, canned food and meat products.