Mrs.D, I have long considered using NAC but I am not sure if it was you or somebody else who said that if I don't have congestion due to mucus, it'll not be of help. Since, thank God, I don't cough and no phlegm/mucus, I havent taken it. Based on my understanding in this thread, it seems that NAC is not only use to loosen mucus, is it?

Thank you.

Mary