7-Up used to contain lithium until scientists discovered that it could be lethal if consumed in large quantities. Taken in proper quantities, however, it has been shown to be beneficial. In fact, it has been shown to reduce the rate of suicides in places where it occurs naturally in the water.
In 1990 a study of 27 counties in Texas, researchers discovered that, in the places where the water had the least amount of lithium, people had significantly greater
levels of suicide, homicide, and rape than the people whose water had the
higher levels of lithium. In fact, the group whose water had the highest
lithium level had nearly 40 percent fewer suicides than that with the lowest lithium
level. In Japan, a study of more than a million people over a five-year period
found that suicide rates were inversely correlated with the lithium content of
the local water supply. Similar studies in Greece and Austria have corroborated
these findings. Moreover, in reanalyzing the Japanese study, researchers discovered
that those people with higher levels of lithium in their water supply had lower
levels of “all-cause mortality.”
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