... Digestion rate 3.rich in Amino acid, vitamin Yeast powder(Feed grade) 40%,45%,50%,55%,60%.A. Function and use1 ... order to reduce costs. 2. Rich in a variety of vitamins and carotenoids, especially rich in vitamins B, can prevent ... vitamin B deficiency occurred. 3. Rich in a variety of digestive enzymes, not only help to digestion ,but also ... place Shelf life: 12 monthsPackage 1Package 2 Yeast feed 50%