Feel the MEGA dose! ARGI POWER™ 1500 MEGA CAPS® MEGA CAPSULES® contains 1500 mg of highest-quality pharmaceutical L-arginine HCL in 1 capsule!!! L-arginine is a food ingredient that participates in the formation of many important biologically active substances in the body, e.g. nitric oxide (NO). Moreover, arginine acts as a provider of the formamidine group in the biosynthesis of creatine. Argi-Power works great as an independent supplement, as well as a valuable addition to OLIMP creatine stack.