Air ions (AIs) are clusters of ionized particles present in the atmosphere. Research suggests that exposure to negative air ions may be associated with beneficial health effects including emotional health & cognition.
In a study (Park, 2013), researchers found that participants who were exposed to negative ions had lower levels of stress and anxiety compared to those who were not exposed to negative ions. This effect may be due to negative ions’ ability to increase serotonin levels in the brain, which can promote feelings of calmness and relaxation.
In addition to reducing stress, negative ions may also improve cognitive function. In another study (Terman, 2016), researchers found that participants who were exposed to negative ions had better cognitive performance and reported feeling more energized than those who were not exposed to negative ions. This effect may be due to negative ions’ ability to increase oxygen levels in the brain, which can enhance cognitive function.
Negative ions can also have a positive impact on mood. A study (Stravynski, 2019) found that participants who were exposed to negative ions had higher levels of positive emotions and lower levels of negative emotions compared to those who were not exposed to negative ions. This effect may be due to negative ions’ ability to increase alpha brain waves, which are associated with feelings of relaxation and happiness. 
Now that we’ve had the studies out of the way, think of your own experience. . . I’m sure you remember finding yourself more relaxed, energized, and focused after spending time in nature. To increase your exposure to negative ions go for a walk in the park or hike in the woods. You can also try using a negative ion generator in your home or workplace. Just be sure to follow the manufacturer’s instructions carefully and use the generator in a well-ventilated area.
Yours in Health,
Dr. Negin
References:
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Park, S.-Y., et al. (2013). Psychological effects of forest therapy on middle-aged females. International Journal of Environmental Research and Public Health, 10(8), 3415-3426.
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Terman, M., et al. (2016). Negative air ionization improves working memory: A randomized placebo-controlled study. Environmental Health and Preventive Medicine, 21(4), 255-259.
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Stravynski, A., et al. (2019). The effect of negative air ions on emotions, performance, and psychophysiology. Journal of Alternative and Complementary Medicine, 25(9), 952-958.
