K-Boost is the brand name for a stimulant injector that is centred around a injection of Phosphocreatine. This acts as a high energy reserve, which when injected during strenuous exercise, acts as a booster, allowing the user to go further. This effects skeletal muscles and the brain, allowing the user to be both more physically and mentally active and is especially useful when tired, both physically and mentally and the user needs to recover faster or operate for a short while longer.