I’m not talking about mineral springs, or chugging a glass of seawater. I’m talking about the groundwater for much of continental Europe. Again: it’s supposed

I’m not talking about mineral springs, or chugging a glass of seawater. I’m talking about the groundwater for much of continental Europe. Again: it’s supposed to bioaccumulate there. Bioaccumulation is a part of homeostasis; the fact that iron (calcium, etc.) bioaccumulates is neither a reason to avoid it nor to exceed a healthy dietary quantity. And the evidence is overwhelmingly supportive of municipal fluoride levels being both safe and sufficient for dental health.