I have a good friend who takes it daily for her immune system.

Others are jumping on it to "detox" their bodies as they've done the vaxxes and are having issues and want to clean their bodies.

There is a lot of info on this antioxidant and I'll just post this one link.

Studies show N-Acetyl Cysteine supplement can protect against COVID-19

Personally I don't take it, I have other antioxidants that work for me and I do no vaccines.