Traditional Chinese medicine believes that "hair is caused by blood, the kidneys govern the bone marrow, and the essence is in hair" Black food has certain benefits in nourishing the kidneys. Combing hair can promote the rise of clear yang and the harmony of qi and blood.
Boiling Platycladus orientalis leaves in water can relieve mild hair loss and gray hair caused by kidney essence deficiency. The best combs are horn combs, wooden combs that do not generate static electricity.