1.certificated by Kosher 2.100% fresh natural brewer yeast 3.riched in eight essential amino acids, peptide,vitamin B,ect. Brewer yeast powderBrewer yeast powder ( debittering type) is derived from selected brewer yeast processed by self-reliant patented technology. It is rich in high quality protein, vitamin B, dietary fiber, yeast sourced polysaccharide and selenium, zinc, chrome and other ...