New Powerful Formula. Mass Gaining Formula With mTOR Activators. Science confirms what athletes have always known: high quality calories and protein intake is linked to muscle size and strength. Monster Mass is a macronutrient dense gainer designed to maximize lean mass gains. 50% More Leucine. Monster Mass is fortified with 4 grams of added L-Leucine to drive an industry leading 3:1:1 Ratio of BCAAs. Recent university research shows that Leucine enriched beverages consumed with exercise synergistically activates and prolongs activity of mTOR signaling pathway, which increases muscle anabolic potential (muscle growth). Monster Mass contains 50% more Leucine per gram protein than typical protein powders. Typical Amino Acid Profile per 4 scoops 150g (50g Protein): L-Isoleucine 2,495mg, L-Leucine 8,465mg, L-Valine 2,560mg, L-Tryptophan 710mg, L-Lysine 3,810mg, L-Threonine 2,370mg, L-Phenylalanine 1,625mg, L-Methionine 955mg, L-Alanine 1,830mg, L-Arginine 1,110mg, L-Glycine 775mg, L-Aspartic Acid 4,135mg, L-Glutamine & Precursors 10,215mg, L-Cysteine 945mg, L-Histidine 945mg, L-Tyrosine 1,570mg, L-Proline 3,310mg, L-Serine 2,175mg. 50g Protein Matrix: (0-2 Hours, Rapid Release Proteins: Whey Protein Concentrate, Whey Protein Isolate, Whey Protein Hydrolysate). (2-6 Hours, Sustained Release Proteins: Whey Protein Concentrate, Milk Protein Isolate, Micellar Casein, Caseinates). 610 Calories: Macronutrient Dense Formula For Maximizing Lean Mass Gains. 4g Added L-Leucine: For mTOR Pathway Activation (Muscle Protein Synthesis). 2g Added L-Glutamine: To Enhance Muscle Tissue Recovery/Repair. 250mg Aminogen: Digestive Enzyme Complex For Efficient Protein Digestion and Utilization. Carbohydrates Drive Protein Utilization: Carbohydrates Trigger Insulin Production Which In Turn Helps Drive Amino Acid Uptake and Utilization By Muscle Tissues. Since we founded CytoSport in 1998, we've been dedicated to working with sports scientists, coaches and trainers to redefine protein enhanced products for active lifestyles and serious athletes– supporting performance when it matters. Over the years, we've expanded to create a comprehensive line that encompasses the athletic experience from preparation, to hydration, to recovery. Our products are among the very few that are manufactured in a NSF International GMP for Sport Registered facility. Our facilities are also inspected and regulated by the FDA. We carefully manufacture our powder products and ready-to-drink pre-blends onsite at our corporate campus in Benicia, California. Making efficacious products for athletes and active lifestyle individuals requires responsibility on all fronts. As our business has grown, so has our footprint. We have made environmental sustainability a focus and driver in everyday decision making. For more, please visit our website. Through it all, CytoSport has been committed to one thing, building athletes from the inside out. Greg and Mike Pickett, Father/Son. Made in USA.