ENERGY provides energy and mental clarity for general activity. GPS Energize feeds the muscles and neuromuscular system and protects muscle tissue from being broken down by activity. There is no need to take ENERGY and GPS Energize at the same time, but you can take them on the same day. Do not exceed 4 servings per day of ENERGY, Metabolic ONE, GPS Energize or PURE Café in any combination, to prevent potential undesirable effects of too much caffeine.