I saw the product named 'Immunist' advertised as an iodine nasal spray for anti-Covid efforts. I looked it up on the 'Net and see the FTC sent the company a warning letter.
The links I tried to access the letter were dead. So I tried the wayback machine (Internet Archive) and saw that it had been saved a few times, the most recent is August.
The warning letter cites many exammples of advertisements for Immunist and then writes that it's not legal to claim that a product is effective if you don't have legitimate reason to believe it to be true...see where I'm going with this?
Maybe the .gov has since realized they might be called on their hypocracy and deleted it. Or maybe it's just my hypersensitive browser software refusing to link - that happens sometimes. Original document link: www.ftc.gov
Wayback Machine (archive.org)
This is standard in the industry. Depending on the statement (claims) and the data provided (if any), the statements of efficacy and safety are negotiated with the FDA and put in the label (package insert). As this is OTC product and regulated by the FTC, there may be a lower threshold. My guess is the company saw the peer-reviewed lit, made a claim and statement in the press, and got slapped down. They may or may not come back with the data and negotiate.
The info is out there if people want to find it. That may have been the extent of their plan.