... in nucleotides, nutrition of peptidea, glutathione, etc Autolysis Yeast Powder (Feed Grade) GSZ-221 Appearance : odor light yellow or yellow brown ... enzymes, enchance digestion and absorption rate, which can effectively improve feed efficiency.Rich in nucleotides, peptides and polysaccharides, such as immune ... it after use and keep moisture proof. Autolysis Yeast Powder (Feed Additive)