Sustained-Release Ultra-Premium MPI Blend. With Natural 80:20 Casein: Whey Ratio. Protein Shake Mix. UMP is considered a “must have” by natural physique athletes and other Beverly clients. They rely on its naturally balanced blend of high-quality proteins to help them recover from workouts, build and preserve lean muscle, and support healthy body weight. Why people like it:. Hours of muscle-building support: 90% of the protein in UMP is supplied by Milk Protein Isolate (MPI), Obtained from fresh skim milk, MPI contains a natural 80:20 blend of casein and whey protein that supports your muscles for hours at a time. The lasting effects of UMP make it great for use at breakfast time, post-workout, before bed, etc. Rich, satisfying flavors and creamy mouthfeel make it a treat to eat. Stomach-friendly: Easy to digest. No gas or bloating. Can be added to shakes, smoothies, brownies, puddings, cookies, and more.