research Maternal and neonatal hair mercury concentrations: the effect of dental amalgam March 2003 in “BJOG: An International Journal of Obstetrics and Gynaecology” Mothers and newborns with dental fillings have higher mercury in their hair, but adding fillings during pregnancy doesn't raise mercury levels further.
research Thallium - poisoner’s poison: An overview and review of current knowledge on the toxicological effects and mechanisms January 2024 in “Current research in toxicology” Thallium is highly toxic, causing severe health issues, and Prussian blue is the best antidote.