Negative ions (that is, negative-charged
ions) in a room
act as air purifiers, causing dust, pollen, mold, smoke, and many other allergens to stick together
and fall to the floor, or be attracted to objects in the room. Among other things, they can make the
air you breathe more pure and allergen-free.
A high negative ion exposure appeared associated with
feeling better about self, less sensitive, and more responsive or innervated (energized).
8/82 issue of Aviation, Space, and Environmental Medicine.
Studies have shown that some people become
moody or very
depressed when negative ion counts are very low (Seasonal depression) or when positive ion counts
are high (such as in front of a computer monitor).
"Results indicated that subjects had faster
reaction times and reported feeling significantly more energetic under negative Air Ion conditions
than under normal air conditions."
From Influence of Negative Air Ions on Human performance
"... The introduction of negative ion generation
increased the subjective rating of alertness, atmospheric freshness, and
environmental and personal warmth."