Spend a few hours and browse some of the paid ads and ads that look like real articles about cures and balms from 1850~1915 or so newspapers in a Google newspaper search. I now understand why regulation or at least a standard is now in place that labels some things as "This is an advertisement" and why there are labels on things that state "not medically proven" and such.
One random example here at the bottom of page 1 column 4.
If you look and read random papers you will many more scattered throughout with some wild claims.
Ointments that promise to fix just about anything. Aspirin is even in some of those ads promising to fix all kinds of things, it is still around but had many more claims for fixing ailments back then. Left without regulation, people WILL make wild claims to make a buck, that is why we have many of these consumer protection regulations now.