For example, like the ones worn by women's volleyball players, right? Some are called energy silicone neck rings, which contain titanium elements. They can ionize cells by emitting consistent wavelengths, regulate body currents, and thus be beneficial to the human body. role.

Another element is germanium. It increases the oxygen-carrying capacity of the blood. Activate brain tissue, delay brain aging, and improve human microcirculation.

Many people now wear this kind of element necklace.

I saw it on Taobao.