It seems to be helping a little but I have not had it very long and I am hoping for better and better. I have used it religiously since I bought it and I am up a few notches from my starting position which must mean a good start to my breathing improving, a word of warning though....I use an inhaler for astma and I would say that whilst building up the breathing, my breathing , immediately after using the product has worsened, presumably as the muscles have to be worked to get stronger and improve. All in all a positive feeling and I hope it will permanently help my lungs.