Our signature blend of BCAA’s (Branched-Chain Amino Acids) + EAA (Essential Amino Acids) is one of the most effective supplements for any fitness and nutrition program. The main role of O2 Fuel Recharge is to help stimulate protein synthesis in the body, which is the process of making muscle. It also helps to decrease muscle soreness and reduce muscle fatigue allowing for quicker recovery. Other benefits include increased energy levels and mood enhancement. Recommended to take before/after training but can also be taken throughout the day.