I don’t have the links, but it was supra who posted his evidence when he was making the same thing calling it the ring of power. You should be able to find it in google under ring of power, basically some older dude got his testosterone levels checked for a routine check up. He then came to the doctors later on after wearing the ring of power and checked his testosterone levels again to find they had skyrocketed. Pretty sure supra went to the doctors as well and the doctor said he was in the 3 highest test levels he had seen and the other guys were using steroids.
Definitely not conclusive evidence, what is mainly meant to be raising the testosterone is the zinc transfer direct to were it is needed.
We had a lot of people using them here and I can’t remember anybody getting anything from it, anything to do with the ring of power I would write off as gorilla marketing techniques.
I haven't failed, I've found 10,000 ways that don't work. Thomas Edison (1847-1931)