Protein 45%min, more than 50 nutritional elements at least, is a perfect protein additive for pet, livestock and aquatic feed. The brewers yeast powder is made from the 100% pure brewers yeast. Its processed through de-impurity, autolysis, dryness and etc. Its a perfect protein material for pet, livestock and aquatic products. The product contains more than 50 kinds of nutritional elements, the ...