The reason Nitric Oxide Plus or any of our arginine products produce more Nitric Oxide than any other products is based on science. Arginine only has a half life of a couple of hours, that means that in less than 4 hours there is no Nitric Oxide production. Most of the competition have a ratio of 5 to 1 or as high as 25 to 1 in the arginine/citrulline combination. With 25 to 1 the Nitric Oxide is not much beyond 5 hours and very little beyond 3 hours. With a 5 to 1 ratio the production of Nitric Oxide is about 8 hours and weak beyond 4 hours. With a ratio 2 or 3 to 1 arginine/citrulline the Nitric Oxide is strong for 12 hours. With our products, we have two doses per day to get 24 hours of Nitric Oxide production. And this is the most important part of the reason for our products outperforming all others in Nitric Oxide production. See the graphs below where Dr Boger demonstrates the science of this issue and the comparisons.