... .high protien45%,50%,55%,60% 3.improve animal grow Feed additives :Yeast powder(Feed grade) 40%,45%,50%,55%,60%.A ... enzymes, not only help to digestion ,but also improve certain enzyme activity in the digestive tract. 4. Enhance immunity, adsorption Pathogenic ... place Shelf life: 12 monthsPackage 1Package 2Used for animal Feed additives--yeast feed