Superior to Whey Protein Alone For Muscle Growth and Recovery. GABA, Added BCAAs and Enzymes to Support Lean Mass and Recovery. The New Standard for Growth Promoting Protein Supplementation. Research Has Shown That The Combination Of Whey And Casein Protein Is More Effective For Supporting Muscle Growth And Recovery Versus Whey Alone. Features Growth Factors and Immunoglobulins from RPM Factors. Bromelain and Papain Support Exercise Recovery and Protein Digestion. The Combination Of GABA And Whey Protein Has Been Shown To Support More Lean Mass In Conjunction With Exercise Than Whey Protein Alone. Muscle Serum Contains More BCAAs Per Serving Than Whey Protein Isolate. Typical BCAA Profile Per Scoop (36g) From Added BCAAs And Those Naturally Occurring In Protein: L-Leucine: 2.9g, L-Isoleucine: 1.8g, L-Valine: 1.8g.