@theglobalnomad1
The standard reply from researchers is always to wait for final results from phase 3 studies and officia FDA approval - they need to say those things from a liability concern.
There is an independent credible lab that tests supplements such as lithium orotate - ConsumerLabs. We have purchased one of their tested products to use.
The micro doses and just making sure you hydrate should address any concerns over kidney issues (assuming you don’t have advanced kidney disease).
Our perspective is that the disease is not waiting for FDA approval - thus we are willing to utilize evidence supported approaches such as TMS, 40 Hz light and sound, and lithium to try to slow progression. There are no magic bullets , but even if each treatment approach has only a minor effect, hopefully it will on a cumulative basis have a meaningful effect.