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[–]gretathroatborg 4 insightful - 2 fun4 insightful - 1 fun5 insightful - 2 fun -  (2 children)

flouride

[–]Robin 4 insightful - 2 fun4 insightful - 1 fun5 insightful - 2 fun -  (1 child)

https://jamanetwork.com/journals/jamapediatrics/fullarticle/2748634 Yeah, to name just one of many possibilities... :-(

[–]Airbus320 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 2 fun -  (0 children)

Is lead poisoning still common?