A back support, or similar biomagnetic therapy product
A number of companies which have magnetic Magnetic filter therapy products available for purchase often fail to indicate the type of magnets they use in their supports, wraps, braces, and other therapy products and devices. You should exercise caution if you encounter this type of practice, because the magnets used in these biomagnetic products may be composed of inferior, lower-grade materials and the strength of their electromagnetic field may not be adequate to provide the desired health benefits.