Magnum Nutraceuticals' Research and Development team has handpicked these ingredients for synergistic effects. Arginine is a strong amino acid that may help support muscle recovery, endurance and protein synthesis. L-Citrulline and L-Norvaline are known Arginine catalysts, maximizing your training experience. With the addition of 5 sources of Creatine, Serum may also promote muscle strength and muscle mass without any bloating, water weight or loading phase. Arginine is a semi essential amino acid that is a building block of protein. Arginine is not manufactured endogenously, and exogenous consumption is required to satisfy Arginine requirements. Arginine is known best for the "pumps" it creates and is recognized as an all-natural way of supporting increased strength, and lean muscle mass. Creatine provides energy to your muscles. Muscles receiving energy is critical for anyone active; especially anyone lifting weights, exercising, playing sports, or any other activity that is demanding and stressful to your muscles. Creatine has been suggested to help increase lean muscle mass, muscle strength and athletic performance.