I am curious why Standford has only studied NAC? We currently use GSH both inhaled and oral, however I have been considering using small amounts of the NAC as well. Do you use the same brand as the study? As every CF parent we want to do the best, but it is often hard to know what that is. The studies that I have read on both sides (GSH and NAC) make a lot of sense to me as well as the testimonies of people using both. If you could give me some insight I would appreciate it.