Antimanic and phase-prophylactic features of lithium (Li) in subjects with affective
disorders has been known for a long while. Furthermore, it has also been proven for
decades that - partially due to its aforementioned effects - Li has marked antisuicide
properties in subjects with mood disorders. Intriguingly, consistent findings from
several studies conducted in the last 15 years suggest that the antisuicide effect
of Li can also be detected in those members of the population who consume drinking
water with high Li contents (in connection with this, we must note that the level
of Li in tap water is several orders of magnitude less than the therapeutic dose of
Li). Based on these results, and also taking into the consideration the long-known
anti-goiter effect of iodized table salt, some experts suggest considering the enrichment
of tap water with microdose Li. This paper paper briefly summarizes our current knowledge
on this topic as well as the related clinical and ethical dilemmas.
