Theres nothing dangerous about nac
It must be some degree of effective for them to take it down.
My spouse, who is very “into” natural alternatives, said that NAC can elevate levels of homocysteine (an inflamatory). Always have to be careful balancing.
I have not taken it (at least not in a separate supplement). The study posted seemed to be using NAC for COVID in hospitalized cases.
Not sure how much should or would take as a preventative.
That said, I ordered some more to add to the bottle or two that I have.