Here's something interesting. The FDA has recently scared a bunch of supplement providers (including Amazon) from selling N-acetylcysteine (NAC), apparently a widely popular and cheap supplement that protects the liver. They warned everyone that they were reclassifying a drug-turned-supplement from the 60's - that's been a supplement for decades - as a drug once again.
https://medicalkidnap.com/2021/07/22...s-of-covid-19/
In a completely unrelated and totally not connected matter, Phase 2 trials were run around the same, using NAC to treat C19 symptoms.
https://clinicaltrials.gov/ct2/show/NCT04419025