Toxicity is a big word. What about small long term effects?
Lithium is prohibited in eu outside of psychiatric therapy, too. But it might be an essential nutrient (small doses).
My trust into the official narrative science is limited.
Edit: as the tobacco interest group has proven studies and scientific evidence can be bought. Don’t know why y’all are reacting so allergic
That’s a bit much extrapolation from the few things I’ve written