... .high Digestion rate 3.rich in Amino acid, vitamin Yeast powder(Feed grade) 40%,45%,50%,55%,60%.A. Function and use1.Is ... vitamins and carotenoids, especially rich in vitamins B, can prevent vitamin B deficiency occurred. 3. Rich in a variety of digestive ... and dry place Shelf life: 12 monthsPackage 1Package 2 Yeast feed 50%