... 3.Kosher & Halal Certi. 4.For Industrial Fermentation and Microbiological Medi Brewer's Yeast Extract for Culture Medium and Fermentation GPL-931Brewer's Yeast ... material: Amino acids, antibiotics, nisin, lactic acid, polymer, VC, inosine, ect.Microbiological medium: Pseudomonas, acetobacter, gluconobacter oxydans, e.coli, bacillus subtilis ...