Brian,

What are mate magnets? A google search turned up nothing. Do you have links to research and/or vendors? Are they safe? How long have you been using the magnets and how often?

As far as safety, I'll stick with the idea that if it's not obviously toxic like a drug and it feels good and relieves pain, it probably is safe and healing.
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How funny! I just realized that you were speaking Aussie.

So, I'll change my questions. What type of magnets do you use and how powerful? You mentioned a low price. Do you have a link to the vendor? We all could use practical, specific advice with something that's worked for one of us. Thanks mate.