ENDURO works in concert with your body's cardiovascular system to increase hydration, performance, and endurance during intense physical activity. Enduro is a non-stimulated, non-caffeinated energy booster designed with two special ingredients, L-Arginine & L-Citrulline, which help increase blood flow and oxygen to the muscles and cells of the body. The black pepper extract and bio protected blend in Enduro help maintain absorption of nutrients to the body and improve circulation and blood flow to the body. If you're looking for a non-caffeinated, non-stimulated pick me up that's healthy and safe for daily use, ENDURO is the answer. USAGE: Mix 1 serving (1 scoop) of MTN OPS ENDURO in 8-12 oz of water. Take up to twice per day. Best used as a non caffeinated natural energy boost and endurance product. Great as a caffeine free pre workout, cardiovascular boost for long distance/endurance athletes and oxygen boost during strenuous activities.