Answer:
There has been no scientifically proven effects of magnetism on the body. There are several theories about magnets having the ability to improve the immune system, or help regulate blood flow, but most magnets are not even close to being strong enough to effect the small diamagnetic properties of hemoglobin in our blood. It is highly improbable that magnets can have any effect on our body, and so far there has been no discovery of anything like this happening. If magnetic therapy was a legitimate way to improve the body through magnetic fields it would have been all over the news.