Scientific studies have shown that atmospheres charged with negative ions relieve hay-fever and asthma symptoms, seasonal depression,
fatigue and headaches. It's also been shown that negatively ionized atmospheres improve performance of voluntary movement, increase work
capacity, sharpen mental functioning, and reduce error rates.
Remarkable as it may seem, a room charged with negative ions was shown to stem bacteria growth and precipitate many airborne contaminants
including pollen, dust and dust mites, viruses, second-hand cigarette smoke, animal dander, odors and toxic chemical fumes.
One double-blind trial compared the benefits of
high-density negative ionization and low-density negative ionization for people with Seasonal Affective Disorder (SAD). Depressive symptoms improved by
at least 50% for over half of patients receiving the high-density ionization for 30 minutes daily, while only 15% of those
receiving low-density ionization had 50% or greater improvement. There were no side effects, and all of the patients who
responded to the therapy relapsed when it was discontinued.
In another controlled trial, high-density ionization was as effective as light therapy in treating the symptoms of SAD.
A study at the New York State Psychiatric Institute determined that high-density ionization combined with naturalistic dawn
simulation was a particularly effective antidepressant.
Two well-conducted studies have looked at the effects of air ionization on winter depression. Both of these studies compared
a high-density air ionizer with a low-density ionizer. People sat in a room at home with the ionizer for 30 minutes every
morning over a 2-3-week period. People with winter depression who used the high-density ionizer showed much more improvement
than those who used the low-density ionizer. No studies have been carried out on air ionization as a treatment for other types of depression.
In a number of studies, the use of an anion generator, a type of air ionizer, has shown promise for reducing the symptoms of acute
mania.In a double-blind crossover study at Ohio State University, high concentrations of ambient anions were used to treat 20
acutely manic men.It was concluded that air ionization produced a significant antimanic effect in the treatment of bipolar disorder.
Based on these studies, negative air ionization is an effective nonpharmaceutical treatment.
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