Vitamin Premixes

Vitamin premixes are custom formulated to meet the desired requirements for growth or reproduction, and are blended with carrier materials to produce a batch mix. Premixes are formulated so that only small amounts (5 10 pounds) are added to 1 ton of complete feed. Rice hulls are widely used as a carrier because they are less destructive than most cereal grains and by-product feeds. Ground limestone is often added to increase flowability and density; however, the amount used should be stated on the premix label in order to account for the added calcium in diet formulation.[3,12] Vitamins should not be premixed with trace minerals because the latter will enhance vitamin oxidation. Important physiochemical and handling properties of vitamin premixes and the carriers used are chargeability (electrostaticity), compression, hygroscopicity, lumping, and flowability.[12]

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