Liu Wei Di Huang Wan is a classical formula, a commonly used Chinese patent medicine, mainly for liver and kidney yin deficiency. Due to liver and kidney yin deficiency caused by soreness of the waist and knees, dizziness, palpitations, as well as impotence, premature ejaculation, sperm reduction, menstrual disorders in women, and also infertility, which are mainly caused by liver and kidney yin deficiency, Liu Wei Di Huang Wan can be applied to all these conditions. If the gray hair is caused by Yin deficiency of the liver and kidney, the use of Liu Wei Di Huang Wan is effective, but if it is not caused by Yin deficiency of the liver and kidney, it may not be effective.