It just occurred to me: steel rusts over time and that may lead to other problems.
"Rust has an unpleasant metallic taste, which often deters people from ingesting it in toxic amounts. But prolonged ingestion consuming contaminated well water, for example can cause serious health issues including diarrhoea, stomach ache, nausea and vomiting. In severe cases, liver failure and major cardiovascular complications may occur characterized by rapid breathing, increased heart rate and weak, erratic pulse."
Just balancing the pros and cons of steel!
Tim
But Tim, on the "pro" side . . . dentists love steel shot.
