Yeast extract  is a kind of powder product which is obtained by autolysis of primary grown Saccharomyces cerevisiae yeasts. Description Light beige to yellow, powder form, soluble in water. Balanced Free amino acids, Peptides, Vitamins, Nucleotides, Trace elements. Application As a kind of nitrogen source in culture media, can be widely used in below applications: Laboratory culture media and microbiology test. Widely used in large scale industry fermentation, such as Amino acids, Organic acids, Antibiotics, Enzymes, Vitamins, and other bio-based products.