The gym I go to has a physical therapy area and the physical therapist is pimping these

https://pbsband.com/

No way are they effective and are a big scam. Someone there tried to sell me one (40 bucks) and when he said hold out your arm, I knew right away. That is a huge psychological trick used throughout the yrs to convince people of the effectiveness.

I'm not saying this wristband works or doesn't work, but will say that it comes with a 30 day money back guarantee.

If you buy it and try it, you can return it if you think its a scam.

The bad news is that you will probably have to pay the shipping

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Let Food Be Your Medicine And Medicine Be Your Food.(Hippocrates)

Shipping (which I am sure more than covers the actual cost of the band) plus a certain percentage of placebo effects which are positive.