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Lithium in Water Cuts Suicide Rate

Japanese study links trace amounts in water supply to less suicides

By Rob Quinn, Newser Staff

Posted May 2, 2009 7:26 AM CDT

(Newser) – People in areas where the tap water contains lithium are less likely to kill themselves, according to a new Japanese study. The researchers found that the element—used in high doses to treat mood disorders—appeared to "significantly" reduce the suicide rate even when only tiny amounts of it were found in drinking water, the BBC reports.

The scientists believe the cumulative effect of drinking water containing small amounts of lithium over many years may have a protective effect on the brain. They called for more research to be done, but stopped short of suggesting lithium be introduced to water supplies. Mental health experts said the findings definitely merited further investigation, although they warned that large doses of lithium have unpleasant side effects and can be toxic.

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Japanese researchers have found that naturally occurring lithium in low levels in the water supply cuts the suicide rate, sparking suggestions it be added to drinking water. (©ChrisDownUK)

A suicide prevention hotline by the Golden Gate bridge. (©Piutus)

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This intriguing data should provoke further research. Large-scale trials involving the addition of lithium to drinking water supplies may then be feasible, although this would undoubtedly be subject to considerable debate. - Professor Allan Young of Vancouver's Institute for Mental Health

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Lithium in Water Cuts Suicide Rate