@irene8 The first day I took HLA, over a year ago, I felt it was transformative, my chest felt more supple, breathing was easier•. At the time, I was treated for an aspergillus infection for 3 months; I expelled a LOT of stuff during those 3 months, especially the first month. My SpO2 went from 93 to 98, I felt good, really good, cardio exercise was easier and easier. Nowadays I don't bring up a lot of mucus. I nebulize with 3% saline to clean my lungs (I move mucus then but I don't have a lot of mucus to expel) and it helps also in the way I feel. I will try and find that article again that explained HLA was very protective of the lungs against various kinds of lung diseases. I will look for it again and post it if I find it. May be nebulizing the 7% with hyaluronic acid would be more helpful in expelling mucus, I do not know, I have not tried it yet. Best wishes for great health.