Intense Pump Pre Workout. Infused with Pikatropin for pin-point focus and determination. L-Leucine and HMB for recovery and anabolic muscle development. Agamatine Sulfate & Citrulline for muscle-swelling pumps. You love the high energy pre-workout Mr. Hyde... and then you discovered Dr. Jekyll, the most intense pump formula on the market! Just one scoop of Dr. Jekyll delivers an almost instant rush of muscle-swelling, vein-popping ingredients directly to your active muscles. Whether you train at night, or simply looking for a pre-workout that focuses on pump and endurance, Dr. Jekyll delivers results...period!