I've used them and like them, but I do not know if they are safe to use under magnets. Jandee Smart out here in Cali uses them, she credits the products for her and BCR Stella Bella's results. I think they are a California based company... http://makingyoubetterbrands.com/lame-away-equine-therapy.html
A part of the plant as I understand it. I have used the Old School Horse Rub on my back, it stinks to high heavens but it allows me to use my body in a run as opposed to my legs dangling useless and my brain freezing because my back hurts to the point I can't do anything but lock up.