When Mao Zonggang commented on the Romance of the Three Kingdoms, Liu Bei and Kanroji described it as follows: "The groom is dressed in a brand-new suit, but I don't know if he ever had black beard medicine." It can be seen that in ancient times, black beard and hair were an important symbol of youth and beauty. Nowadays, many young people have premature hair growth because of excessive pressure, often staying up late, overworking and other reasons. Some people have to dye their hair often out of love for beauty, which wastes energy and affects their health. Then try natural black beard medicine, such as Eclipta prostrata and Ligustrum lucidum. It occurs outside the kidney, and black enters the kidney first, so both herbs can benefit the liver and kidney, benefit the lower body and be proud, and have strong yin and dark hair. The following is a brief introduction:

Eclipta prostrata is a yin tonic, also called Eclipta prostrata, which is sweet, sour and cold in nature and enters the liver and kidney meridians. Its main functions are tonifying kidney and yin, cooling blood and stopping bleeding. Because of its sour and cold taste, it can cool blood and stop bleeding, so it is used to treat blood loss due to yin deficiency and blood heat. Ancient doctors thought that it could clear the intestines and expel pus, and it could treat blood dysentery with rapid effect. Eclipta prostrata enters the kidney to nourish yin, so it has the function of black beard. Eclipta prostrata has the characteristics of tonifying the middle energizer and clearing away heat, and is a commonly used medicine for treating yin deficiency and blood dryness and nourishing liver and kidney. Eclipta prostrata can nourish liver and kidney and cool blood to stop bleeding, which can be used as the first choice for patients with yin deficiency and internal heat bleeding syndrome. The medicine can not only be taken orally, but also be applied externally to treat traumatic bleeding.

Fructus Ligustri Lucidi is also called Ilex, which is sweet, bitter and cool in nature, and belongs to liver and kidney meridians. Its main functions are tonifying kidney and liver, clearing heat and improving eyesight. The medicine can tonify the yin of liver and kidney without being greasy or dry, and is a product for clearing away the yin. It is suitable for syndromes such as yin deficiency and blood dryness, soreness of waist and knees due to liver and kidney deficiency, dizziness and tinnitus, palpitation and insomnia, blurred vision, and premature graying of hair.

the compatibility of Eclipta prostrata (harvested in summer solstice) and Ligustrum lucidum (harvested in winter solstice) is one of the commonly used drug pairs, so it is called Erzhi Pill. Both herbs have the effects of nourishing yin of liver and kidney, Eclipta prostrata can cool blood to stop bleeding, Ligustrum lucidum can improve eyesight with black beard, and both herbs can be used to nourish yin and clear heat, and treat lumbago due to yin deficiency, neurasthenia, vision loss, hot flashes and anxiety, premature graying of beard and hair, etc., and dried mulberries can also be added to increase their power of nourishing yin and enriching blood. Both of them can be used not only as pills, but also as decoction or soaking in water, especially for young people with gray hair, whether it is kidney yin deficiency or blood heat, they can be used to soak in water as tea. Both drugs have the effect of treating premature gray hair, but in general, the two drugs must be used together.

Ligustrum lucidum is usually steamed with wine or roasted with salt, while Eclipta prostrata is roasted with charcoal, and the prices of both medicines are relatively low, so it is not recommended to use them directly after picking. The other two herbs are cold, so those with cold diarrhea and yang deficiency should avoid taking them.