Monster Mass is a powerful yet easily digestible mass-building formula. Although it tastes like an ultra-rich milk shake, Monster Mass' 600+ calorie advanced protein and carbohydrate systems make it the ultimate nutritional tool for building monster size and muscle. Monster Mass delivers rapid-releasing anabolic whey, glutamine peptides and free form BCAA's that are complemented by slower, anti-catabolic caseins and other complete milk protein isolates. This powerful combination of fast and slow proteins creates an "anabolic window" that lasts for hours.