Sorry... I am kind of a newcomer as I am not following this board for 3 years now.
I started again after reading the article on oral GSH (see my other post).
I have also been very cautious about alternative medicines with my 5 years daughters in these years, but we use inhaled GSH and we give oral DHA (omega 3) with good results.
Another very successful experience is with Rooibos. A tea from southafrica. It does not impact the lungs but it reduces inflammation in the gut. We needed to reduce our creon dosage of one/third. Anybody else has experience with Rooibos ? We did not see much difference between red or green rooibos. The important thing is that the thea should be prepared from the raw material. No packages rooibos. It is ineffective.