Friend. “Peer reviewed” doesn’t mean what you think it does. Peer review isn’t something that indicates that a given claim is verified. Instead, it’s something that indicates that a given paper has reached the bare minimum for consideration. It’s generally a red flag when people use “peer reviewed” as a synonym for “true,” particularly when the paper is published in a relatively unknown journal, and an entire parade of red flags when people treat “not peer reviewed” as “almost as good as true.”
Regardless of your opinions on the use of various treatments for COVID-19, I strongly recommend that you read this article and take their methodology to heart. “Doing research” doesn’t mean poking around on scholar.google.com and reading extant studies. Sometimes “doing research” means actually running an experiment to verify that the effects claimed in a published paper are replicable. Sometimes “doing research”, as in this case, entails doing statistical analyses of publications looking for tells of shoddy methodology or even straightforward misrepresentation. Note: There’s some really fun tricks that people can use to detect bogus data — for example, when humans attempt to fabricate “random” data, typically the numbers they come up with don’t match an actual random distribution.
Anyway, I hope that helps.