Hi
I've had my son on GSH (oral only) for the last few years. I have some NAC but he doesnt like the taste of them.Both GSH and NAC are the subjects of current phase two trials.I believe the research bears testament to the effectiveness of both these supplements, and my son has been much healthier while on GSH. I'm not convinced about the mucolixer, we did try some but couldnt tell any difference.
Have a look at the above blog, I'm pretty sure that she has a lot of research on there and is a true believer in NAC.