If you've never heard of it, not far from Atlanta, there's this: https://en.wikipedia.org/wiki/Lithia_Springs,_Georgia . Interesting history there, about "restorative" lithia water springs.

Is there any dietary sources for lithium?

Partner just told me a story she used to put Lithium drops in her friend water (reasoning that after 10 days when it comes to action people usually come to their sense and seek professional help, but it didn't work in this case and friend tried to self healing and eventually relapsed).

Did the friend know that your partner added lithium to her drink?

Unsure, but for a person with thoughts that someone is following her, revealing that they are putting something in their drink might be catastrophic.

The full title is Lithium levels in tap water and psychotic experiences in a general population of adolescents.

One wonders what would be found if outsourcing corporations audited their partners tap water.

p = 0.021

"Aquatic lithium has no significant effect on incidence of self-reported psychosis."

As I understand it, there is supposed to be about a factor of two difference between the dose that actually does any good, and acute toxicity. So trace amounts are not expected to help those people who could benefit from lithium medication.

Please correct me if I have misunderstood this.

How long until a community supplements their water supply with lithium?