Milk Specialties Global Animal Nutrition offers Energy Booster Mag. The product is an energy-dense, rumen-inert fat supplement with dietary magnesium and a melting point of 159 F for warm climates, according to the company. Energy Booster Mag contains 2.3% magnesium by weight, along with magnesium oxide and saturated, free fatty acids, the company says. The product is available in 50-lb. bags, 2,000-lb. totes and in bulk.