Very interesting ... I wonder what this means for those of us with 'metal fillings' in our teeth.
https://www.fda.gov/medical-devices/dental-devices/dental-amalgam-fillings#:~:text=Dental%20Amalgam%20Graphics&text=Dental%20amalgam%20is%20a%20dental,silver%2C%20tin%2C%20and%20copper.