About this item COMBINATION OF L CITRULLINE AND L ARGININE: This combination of the two most vital amino acids are needed to get the most from your work out. Our Nitric oxide supplement provides everything your body needs to push your exercise to the next level. PRE WORK OUT SUPPLEMENT: It doesnҴ matter what sport you are in, whether you are a pro or just want to boost your workout, Nitric Oxide is for you. We Guarantee that you will feel the power of our nitric oxide formula from day one. ENERGY LEVELS AND PERFORMANCE FORMULA - Our amino acids that convert into strong nitric oxide help keep your energy levels up through out your workout. Feel the different during your pumps and reach new levels of your exercise during pre workout, during workout and post workout. IMPROVE MUSCLE FLOW AND MUSCLE GROWTH - The strong combination of L-Arginine,L Citrulline, as well as other herbal ingredients in our powerful Nitric Oxide booster work synergistically to funnel clean oxygen and nutrient-rich blood straight into your muscle cells. This pre workout fuel kick starts the anabolic process, and means greater endurance and stronger pumps for record-setting workouts. 90 DAY GUARANTEE: We believe in our STRONG NITRIC OXIDE BOOSTER FORMULA, however as with most supplements, results arenҴ instant. We encourage you to take the daily dosage for a full 90 days, and if it doesnҴ work as described simply send it back for a full refund