ARE NEGATIVE IONS OF BENEFIT TO YOU?

Quite a bit of research has gone into this topic. Research ranges from the pseudo-scientific to the reputable. A list of some papers from the latter group is given here. In summary, there is no evidence that negative ions have any effect on well being however it is defined. The claims by commercial producers of negative ion generators that their products enhance efficiency, increase productivity and contribute to personal health are unsupported by scientific evidence. However, if you think something is going to do you good then it may in fact do so; this is the placebo effect. And a bit of research in the 1990's is going into it. But that is another story.