... 2.appropriate proportion of restrictive amino acids , 3.highdigestion and absorption rate Yeast powder(Feed grade) 40%,45%,50%,55%,60%.A ... . Function and use1.Is a quality protein supplement ingredients, amino acid balance, may ... place Shelf life: 12 monthsPackage 1Package 2 Yeast feed 40%,45%,50%,55%,60%