In that study, the water the people were drinking was up to 20x what was on the high end of the other study. If you are drinking water that is 20-100x higher in

In that study, the water the people were drinking was up to 20x what was on the high end of the other study. If you are drinking water that is 20-100x higher in lithium, that is more like taking the lithium pills than it is like getting it from water. Further to that, the study proved nothing statistically significant... So if 20x higher lithium concentration causes no statistically significant downsides, what could the harm of being on the upper bound of what is typical in areas that are not lithium mines be?