This is a great product. I have COPD and in April started oxygen 24/7. My wife saw Lignosus on Facebook and bought one for me. My doctor said it was okay for me to take them and they have really made a difference. I was using Mucinex, but these are much better. So far I am not coughing the mucus and when I start to feel short of breath I take two sachets of Lignosus and breathe better. I am going to continue ordering these and won’t be without them.