Aren't all magnetic therapy products the same?

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No they are not. Most products on the market use magnets that are either too small, or insufficient in number and strength to provide any real benefit. The polarity of the magnets is also a very important issue. Many products contain magnets that are facing the wrong way (the south or positive polarity is facing the body), which can increase, rather than ease discomfort. There are also products that are improperly using bipolar (both poles on the same surface) magnets which can cause increased discomfort.