Of each of the NO2 boosters I've tried out; Arginine, agmatine, etcetera, this one seems to get the job done the best. In addition, it has the additional advantage of flushing out or buffering ammonia which presents a pleasant temper boost and more energy. I follow the Wim Hof Process http://weight-gain51593.dailyhitblog.com/8802152/5-simple-techniques-for-nitrulline-powder