Negative ions have been getting press because they’re believed to be good for your health. But what are negative ions, exactly? The theory behind negative ions is that they provide a calming effect on the brain. That’s why people are often drawn to the ocean, where negative ions are plentiful in the salty air. A study from researchers at the Federal University of Rio de Janeiro found that participants who inhaled negative ions for 30 minutes showed reduced levels of depression.
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