Average concentrations were the same range as cobalt, chromium, iodine, and selenium, which are known vital nutrients. Inorganic tin is capable of entering into biological activity at saline pH, and it is far less toxic than other known vital trace elements such as copper and cobalt. In addition, tin levels do not vary statistically with gender, age, or geographical areas. Misk found traces of tin in the fetal heart and spleen, and higher levels in the liver, while Schroeder and others reported no tin in stillborns... Full Text