GNC AMP Ultra Nox is a fully-dosed formula delivering the stimulant-free fuel needed to support intense muscle pumps endurance and energy production. Train harder with our advanced complex designed for ultimate performance. Take your workouts to the next level. This advanced formula helps maintain your physical activities for longer so you can crush your workouts with little to no fatigue while maximizing N.O. Production & Blood Vessel Tone. GNC AMP Ultra Nox has a non-stimulant superior fatigue-fighting formula for added energy plus vitamin B12 to maintain healthy blood and nerve cells. GNC AMP Ultra Nox contains 1.5g L-citrulline and a nitric oxide enhancer to help fuel your bodys N.O. cycle for increased power during intense training. Take 4 tablets daily with 8 fl. oz. of water or sports beverage 30-60 minutes before your workout as a dietary supplement. On non-training days take first thing in the morning. For over 85 years GNC has been the leading global health and wellness brand providing the best in performance inspired nutrition. We are committed to meeting the highest standards while applying the most up-to-date advances in nutritional science. Above all else GNC aims to inspire people to live well.