My FIL was a burner at the Quincy shipyard in MA. He drank a quart of milk on the way to work every day. At 58 he was diagnosed with dementia and we lost him again 9 years later.Richard Eames said:As far as I concerned wheel weights belong on tire rims, when welding galvanized pipe, need to drink a lot milk.
It was due to the fumes of heavy metals so do not inhale zinc or galvanized fumes simple breathing masks or apparatus and he would not have left us 30 years ago.