Chocolate is full of lead. I found out about this because about 15 years ago a close friend of mine got stuck in traffic in a rainstorm, got out of his car, wandered around and killed himself in front of everyone. He was in no way depressed. It was so fucking bizarre that his family wouldn't let it rest. They knew there was no foul play because dozens of motorists saw him. Finally it came back that he had severe lead poisoning. That led me down a path trying to make sense. As it turns out leaded gas fumes are extremely high in lead. That lead is absorbed by beans. Coffee AND chocolate. If you consume either of these from areas with high concentrations of leaded gas emissions then you are most certainly consuming lead. I read a lot about this at the time. https://goodfoodfighter.com/why-is-there-lead-in-my-chocolate/