Personally, I have measured that after removing the so-called tourmaline (so-called heating magnet), this kind of products will still heat up when worn around the neck, which means that the so-called tourmaline inside has no effect.

After consulting a lot of information, I carefully identified it myself. The conclusion is that there are many rubber particles on the skin side of this product, and the fever is on these particles. Synthetic capsaicin is mixed with rubber particles, which will heat up when attached to the skin. Because the content is small, the fever is slow and lasts long.

Of course, there are real Tomalin's, but tens of dollars can't be bought, and the cost is more than that.

If you have to buy it, there is a simple identification method, that is, first of all, the price should be at least several hundred, and there are no rubber particles, which should be true (not guaranteed).

If you don't believe the experiment I said earlier, you can take the one you bought apart carefully and try it yourself. If you do as I said, you can throw it away. If it is not hot, you can also wrap the removed tourmaline in a cloth and stick it on your skin to see if it is hot. Don't stick it directly on the skin, because the magnet may have been soaked in capsaicin, and not sticking it on the skin will basically hinder its function.

If the experiment shows that you bought a real tourmaline, congratulations.