Masterspas

Their "Master Force Bio-Magnetic Therapy System" is classic pseudo-science, which means "sounds like science but is actually anything but". A local salesman claimed that the American Medical Association says it works. Not only could I not find any evidence that that's true, I found the opposite - every study I found concluded that magnets do nothing, except for a placebo effect. I encourage you to research it for yourself, think critically, and demand evidence.