Concentration & focus L Carnitine 500mg Keep your energy levels consistent from the office to the gym, Jarrow Formulas L Arginine 1000 mg supports performance by boosting blood flow, enhancing your pump, and improving endurance and L Carnitine is an amino acid found in high concentrations in muscle, heart, and liver tissues. Inside the cells, L Carnitine transports fatty acids into the mitochondria for energy production (i.e., ATP) and reduces