Formulated to support your energy levels and stamina Longer lasting energy More power and recovery USN B4-Bomb is an exhilarating pre-workout, formulated to support your energy levels and stamina when it counts. This innovative supplement can also provide the following benefits: Teacrine which works with the body's natural metabolic processes to deliver longer lasting energy, increasing mental clarity whilst improving mood and motivation. ALA protects the muscle and increases glucose uptake in the muscle for more power and recovery.