Wow this beats even the famous German radon baths!
In the times of widespread radiophobia, comes out there's a whole massive market of quackery targeted at fans of all kinds of "natural therapies" - devices that promise "negative ions", "electromagnetic shield" etc.
...which basically are bracelets or tokens filled with... slightly radioactive thorium oxide, with measurable emissions.
I wonder how many of these people call attend anti-nuclear marches π€
https://www.youtube.com/watch?time_continue=225&v=3BA5bw1EV5I
Details from NRC https://public-blog.nrc-gateway.gov/2014/07/28/negative-ion-technology-what-you-should-know/