Gamma aminobutyric acid (GABA) is an amino acid that works as a neurotransmitter in human brain. Neurotransmitters function as chemical messengers. GABA is considered an inhibitory neurotransmitter because it inhibits some brain signals and decreases activity in human nervous system.

Nisin (E234) is an antimicrobial peptide produced by microbial fermentation. It can effectively inhibit the reproduction of Gram-positive bacteria and inhibit heat-resistant Bacillus and spores exclusively. As a food preservative, it’s usually used in meat products, dairy drinks and other fields.

Natamycin (E235) is an anti-fungal compound produced by Streptomyces fermentation. Except inhibiting the growth of various molds and yeasts, Natamycin can also reduce the production of mycotoxins. As a food preservative, it’s usually used in cheese, cakes and other foods.

Pullulan is a polymer biological polysaccharide produced by microbial fermentation. It has good film forming property, and its aqueous solution has good adhesion, which make it widely used in various food products for candy, snacks etc.

Polylysine is a homopolymer of L-lysine, one of the essential amino acids. It is linked by peptide bond formed with α-carboxyl of L-lysine and ε-azyl from other L-lysine, with molecular weight between 4130-5776, usually used as food preservative.

Sucrose fermentation product is mainly made from white granulated sugar and yeast extract, and safe bacteria in accordance with GRAS are selected for fermentation production. It can usually be used in meat products, dairy products, baking products, egg products, rice and flour products, beverages and other food fields, so that food can produce, change or improve the flavor of food, in line with the development trend of clean labels and healthy food.

Astaxanthin, as a kind of highly efficient pure natural antioxidant, the most important functionis to scavenge free radicals, improve the human body's anti-aging ability, with extremely strongantioxidant capacity, in health care products, pharmaceuticals, cosmetics, food additives and otheraspects ofthe broad prospects for application.

S-adenosylmethionine is an important physiologically active substance widely present in thebiological world, which has the effects of maintaining normal cell function, promoting cellregeneration and antioxidant, scavenging free radicals, etc., and plays a vital role in the normalconduct ofthe body's metabolic activities.