Bought this for my 52-year-old father who’s a chain smoker. Years of smoking has affected his breathing and he’s coughing is alarming already. After about 2 weeks of taking Lignosus, I noticed that he’s breathing is less labored and he’s coughing less. This is very promising! I will have him continue taking this supplement with the hopes of helping him breath “normally” as normal can be in his case.