magnets are fascinating, I have a big box full of magnets. I bough some of them to make a device to effectively pick up nails from part of my land, well another made the device based on my back of envelope drawing. The device worked extremely well. This so my Lamborghini (tractor) not should get punctured wheels. Mostly neodymium magnets.
"While the prospects do not look good for a breakthrough in therapies using weak magnetic fields, perhaps something useful will be uncovered." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2241819/
"These results suggest that exposure to a static magnetic field of 4 T or stronger might lead to physiological and growth abnormalities at the cellular level."https://www.ncbi.nlm.nih.gov/pubmed/8316709
best therapy u can get from magnets is likely from magnet fishing...lots of stuff u can drag up with a weak and strong magnets from the ocean floor (certain coins, nails, bicycles, cars, ships)....more exiting than fishing for fish, magnet fishing also known as vegan fishing (harmless for the fish)!.