Well, my self-care protocol overall has improved my health, so it is hard what difference any one thing makes.
Two thing I know I have are 'sticky mucus" and a hyper-active inflammatory reaction. NAC helps with both, so overall it seems to have a positive effect for me.
I also have asthma and hyper-reactive airways so have avoided inhaled glutathione, which is a component of NAC as it breaks down in the body. Some people here use it and think it effective.
We each need to try things to see what works for long-term management.
Sue
Sue