Right now on XXX they're selling 'magnetic therapy', they'd be as well selling magic beans. I mean, they're charging £100 for some dumb rotating magnet and claiming real medical benefits for this piece of junk. For a complete review of current research on magnet therapy have a look at this paper . The XXX site does also seem to make some ludicrous claims including 'increasing circulation' - I do notice they claim no real medical benefits and all the language is closeted in 'may' and 'might'. Anyway, for fear of being sued, I use evidence from the following sites as the source of my statements:
http://skepdic.com/magnetic.html
http://www.csicop.org/si/9807/magnet.html
Think of it this way, if magnetic fields had an effect on circulation...why's there no effect in MRI scanners? These little magnets on sale are around 2300gauss - MRI units are around 5000-20000 gauss! COUGH...SNAKE OIL...COUGH...
UPDATE: Umm...yes, after talking to a friend of a legal persuasion I've basically bottled it and decided to remove the names of the companies involved - not because I think their products are any good but because I really don't want the hassle of fending off a libel suit...