I take NAC (pureblood) I take it because I'm around a LOT of vaxxed people. Friends that took the jab, I tell them to do Carry Medejs protocol and take NAC and other stuff. Most say they feel better after doing it

MAC was banned by the FDA as soon as it was announced that it was a good thing to take for Covid, etc. NAC is the precursor to glutathione, so that can also be taken if NAC can't be found. Interesting that some vitamin companies are dropping various products. I also find if I'm around even one vaxxed person, I get some symptoms.