Although it tastes like an ultra-rich milkshake, MONSTER MILK's advanced protein system makes it an ultimate nutritional tool for helping to build muscle. MONSTER MILK is the most powerful, easily digestible, sustained-release protein formula. Rapid-releasing anabolic whey, glutamine peptides and free form BCAAs are complemented by slower, anti-catabolic caseins and other complete protein isolates. This powerful combination of fast and slow proteins create an "anabolic window" that lasts for hours.