Shouwu shampoo due to external use can play a limited role in the efficacy of the general can not achieve the effect of gray hair into black. Shouwu is the Chinese medicine He Shouwu, is Polygonaceae He Shouwu dry tuberous roots, its taste bitter, sweet, astringent, warm, into the liver, heart, kidney three meridians, have nourishing blood and nourishing yin, detoxification carbuncle efficacy, in addition to lubricate the bowels and the effect of interception of malaria, the role of the treatment of premature whitening of the beard and hair, malaria, rubella, sores and carbuncles, itching and constipation has a therapeutic effect. He Shou Wu is usually used in decoction to treat premature whitening of hair due to deficiency of the liver and kidneys (weak liver and kidneys) and deficiency of qi and blood, and is often used together with other drugs such as dihuang (地黄), chasteberry (女贞子), mulberry (桑椹子), and so on. This product is strong in tonicity and astringency, and is contraindicated in cases of dampness and phlegm. Raw use of slippery bowels, loose stools should not be used. The adverse effects of He Shouwu are not clear. If you need to use the drug He Shouwu, should be used under the guidance of a traditional Chinese medicine practitioner to identify the evidence, not to buy their own medication, so as not to delay the condition.