just had mine done for the first time.
I remeber as a kid I would use my teeth to remove the lead bullet from 22's in order to get the gunpowder out of them. I distinctly remember chewing on a couple because they tasted sweet. When I started casting my wife had a cow, and thought I was gonna die of lead poisoning, well I tried to show her data on lead but she is as stubborn as I am. so I got tested and it turned out I was only a 3. Doc just called and told me. I didn't notice any long term effects from chewing on lead, but it was at a time when "experts" say it is the worst for you, when your brain is developing.