Ironflex Arginine is a dietary supplement that helps increase nitric oxide, thus improving muscle vascularity during training. Arginine significantly increases the efficiency of training, the muscles receive nutrients better and your endurance will increase considerably. Ironflex Arginine has higher properties than the free form of arginine. It is the most advanced supplement for increasing muscle vascularity during training, ideal for both beginners and professionals. Dosage: Take 3-5g before training in 200ml of water. On rest days, take a 3g dose before bed.