itric Oxide supplements have been the weapon of choice for maximizing the pump. Essentially, Nitric Oxide helps promote blood flow to the muscles, which in turn supports a better pump. NO3 Chrome utilizes NO3 in the form of Arginine Nitrate—a fusion of L-Arginine and Nitrate. Combining these two efficient and powerful ingredients helps give you the long lasting, unbelievable pumps to help your muscle gains.