Clinical use of lithium salts: guide for users and prescribers
journalbipolardisorders.springeropen.com
journalbipolardisorders.springeropen.com
It is possible to buy trace mineral drops which contain such small amounts of lithium as to be safe for everyday use (as a bonus they also contain other useful trace minerals, like magnesium). I personally have been using them for years.
[1] https://www.ncbi.nlm.nih.gov/pubmed/1699579
[2] https://www.researchgate.net/publication/263055240_Standard_...