The efficacy of this product comes from three substances rich in "vitality cement": intercellular cement, which has a structure similar to the cementing substance of hair itself, and thus can easily blend into the damaged gaps of hair; natural proteins tightly bound to intercellular cement, which replenish the lost proteins in hair; cations with positive charges, which not only carry the elements in intercellular cement to the inside of hair, but also smooth the scales of hair cuticle. Ultimately, at the damaged parts of hair, the vitality cement essence reconstructs the lost substances inside hair, making hair regain elasticity and toughness from the root to the tip, and making hair fiber tissue more compact and soft.