Premix (Blending) Premix is made by uniformly mixing one or more trace ingredients like various trace mineral elements, various vitamins, synthetic amino acids, plant extract, certain drugs additive, etc. with thinner or carrier in certain ratio. It is an osculant compound feeds. We can also make the premix according to customers' demands. Contents in Premix The premix consists of vitamins, amino acids, protein, minerals, carotene, plant extract, etc.