A doctor that I used to use did a lot of work with magnets, including using them for diagnostics-- I do not and did not understand exactly what the procedure was, but he was able to get get information that was verified using other, independent procedures. It has been ten or more years since, and, surprisingly(given that it seemed to work), I've never heard about it.

Another doctor that I had, who was much more mainstream(in fact, he was one of those doctors that always are on lists in magazines) told me that if it works, and doesn't do any harm, you should keep doing it--He told me that a there are a lot of therapies don't work for everyone, or even for most of the people that try them, but can be very effective for a few people--and If it works for 99 others, but not for you, it doesn't work--