![]() Researchers looked at 100 years of studies and found evidence that negative ions could: But this study did find a small improvement on cognitive performance after short-term exposure to increased negative ions.Ī 2018 review of ionization literature also found an effect of negative ionization on many facets of human health. Lower levels of exposure (just 30 minutes or so) were only enough to help people affected by SAD.Ī very small 2015 study didn’t find any major effects on mood or mental health from negative ions. Shorter duration of negative ion exposure may positively affect seasonal depression.High levels of exposure (like several hours or more) to negative ions caused people with chronic depression and seasonal affective disorder (SAD) to record lower scores on surveys of their depression symptoms. ![]()
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