I heard that hair crystals have some kind of energy, and what effects they have on the human body. Are these true? Scientific? Or superstitious?

Fa crystals do indeed have energy. All materials in nature are radiating crystals. They have been buried underground for hundreds of millions of years. Its energy is conceivable. As for its effects, you can only say whether you believe it or not. Without a kind of psychological sustenance, no one can expect to win five million by worshiping the Bodhisattva. As long as you bring the things you like, you will be happy and in a good mood. Naturally, everything you do will get twice the result with half the effort, bringing you good luck