Barb; hyaluronan or hyaluronic acid in high not low molecular weight helps in flare up and there are trials to see if it stops emphysema in lungs going on right now. They are (nih.gov/news-events/news-releases/nih-study-shows-hyaluronan-effective-treating-chronic-lung-disease) I have researched and this seems to stop elastin degradation in the alveoli which is a big part of emphysema, it also clears mucus from the lungs.