The food additive Nisin is a kind of polypeptide substance produced by Streptococcus lactis, which consists of 34 amino acid residues and has a molecular weight of about 3500 Da. Because Nisin can inhibit most gram-positive bacteria and has a strong inhibitory effect on the spores of Bacillus, it is widely used in the food industry as a food preservative.

The mechanism of action of Natamycin is to combine with ergosterol and other sterol groups in fungi to inhibit the biosynthesis of ergosterol, thereby distorting the cell membrane, ultimately leading to leakage and cell death. Surface treatment of dough with Natamycin in baked goods can obviously extend shelf life.

L-carnitine is a type of amino acid that promotes the conversion of fat into energy. The pure product is white crystal or white transparent fine powder. It is easily soluble in water, ethanol and methanol, easily soluble in acetone and insoluble in ether, benzene and chloroform. Ethyl acetate. L-carnitine easily absorbs moisture, has good water solubility and water absorption and can withstand high temperatures over 200°C.

L-carnitine has no toxic effects and side effects on the human body. Red meat is the main source of L-carnitine, and the human body can also synthesize it to meet physiological needs. Not a real vitamin, just a vitamin-like substance. It has many physiological functions such as fat oxidation and breakdown, weight loss, anti-fatigue, etc. As a food additive, it is widely used in infant food, diet food, sports nutrition, dietary supplements for middle-aged people and the elderly. Nutritional enhancers for vegetarians and animal feed additives, etc.