What's the use of bian Shi? Can you really promote blood circulation and dredge collaterals?

Yes, you can. Many people question Bian Shi's function and think that Bian Shi is an ordinary stone, and its function is purely hype. In fact, the real bian stone can really improve human blood microcirculation, which can be verified by microcirculation tester. Generally speaking, regular businesses will also issue corresponding test reports.