Depending on the symptoms, patients who need to turn gray hair into black can use Cao Yuandan, Gui Spleen Pill, Yue Ju Pill, Seven Treasures Beauty Beard Pill and other remedies. Patients with blood-heat syndrome are mostly seen in young adults, i.e. the so-called juvenile white head, accompanied by irritability, head baking heat, etc. Such patients can use Caoyuodan to cool the blood and darken the hair. Patients with emotional troubles can be seen as depressed or overworked, and their hair often turns white in a short period of time, mostly starting from the temples, accompanied by loss of appetite, dry mouth and throat, chest tightness and abdominal distension, etc. Such patients can use Gui Spleen Pill and Yue Ju Pill to ease the liver and relieve depression (treating depressive illnesses by unblocking the liver’s qi), and nourish the heart and spirit. Patients with deficiency of yin and blood are mostly seen in middle-aged and old people, with gray hair starting from the temples, often accompanied by dizziness, blurred vision, memory loss, and lumbar and knee soreness (a feeling of soreness and weakness in the lumbar area and knees). The adverse effects and contraindications of the above formula are not known. If you want to darken your hair, you should seek medical advice in time and should not take medication on your own, so as not to jeopardize your condition.