Americans seem to be particularly susceptible to being scammed.

References :

https://en.wikipedia.org/wiki/Snake_oil

https://pmc.ncbi.nlm.nih.gov/articles/PMC1676328/

https://www.cspinet.org/news/airborne-agrees-pay-233-million-settle-lawsuit-over-false-advertising-its-miracle-cold-buster

https://www.fda.gov/food/information-consumers-using-dietary-supplements/questions-and-answers-dietary-supplements

https://www.investopedia.com/terms/p/pumpanddump.asp 

Tim Minchin "Storm":

https://www.youtube.com/watch?v=HhGuXCuDb1U