Allnutrition Big Pump Pre-Workout is a pre-workout formula designed for strength athletes who want to feel the pump during training without additional stimulants. It contains a blend of ingredients responsible for nitric oxide production. L-citrulline and arginine are responsible for increasing nitric oxide production (and extra pumping). Beta-alanine is known for its effectiveness in allowing longer workouts, which can contribute to rapid muscle growth. In addition, muscle growth is supported by creatine, which in Allnutrition Big Pump Pre-Workout is provided by creatine monohydrate. Nitrogen is enhanced with taurine, which supports creatine absorption.