Animal Pump is an effective and unique pre-workout product from sports nutrition experts Universal Nutrition. Animal Pump is like a self-contained 'stack' incorporating all the various popular types of preworkout products into one hassle-free solution. Each Pump pack contains a preworkout energy subformula, a muscle-pumping nitric oxide subformula, a creatine formula, an antioxidant subformula and an insulin transport subformula to get everything inside the muscle cells. You take Animal Pump before working out to set up your muscles and metabolism for maximum power output and performance. That translates into bigger and better gains that you achieve faster than without Animal Pump.