Media only screen and max width 400px desk display none media only screen and min width 401px mob display none take your mass and size goals to the next level by using progain extreme progain extreme provides 40g of protein in every serving using fast acting and slow release proteins every serving of progain extreme provides 600 calories 3g calcium hmb and 40g of high quality protein for gains in muscle size it also naturally contains 99g of bcaas and 79g of g