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Salt may be "nature's antidepressant"

(Medical News Today) UPDATED 2009-03-11
Scientists working with rats have found that animals who have a salt deficiency appear to shy away from activities they normally enjoy. The investigators say this finding suggests that a salt deficit--and the craving associated with it--can induce one of the key symptoms associated with depression. Experts say the idea that salt is a natural mood-elevating substance could help explain why humans are so tempted to over-ingest it, even though it's known to contribute to high blood pressure, heart disease, and other health problems.
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