Er Zhi Wan (Two-Essence Pill): A Simple Formula for Nourishing Liver and Kidney Yin
- Hongji Medical
- 1 day ago
- 4 min read
The Two-Essence Pill (Er Zhi Wan) is a popular traditional Chinese medicine formula known for its simple ingredients and noticeable effects in nourishing the liver and kidneys, and slowing down aging. It's like a bright star in the night sky, guiding people towards a long and healthy life.
The name "Er Zhi Wan" comes from the two key herbs it contains: glossy privet fruit (女貞子, Nǚ Zhēn Zǐ) and Eclipta (旱蓮草, Hàn Lián Cǎo). These herbs are harvested around the time of the Winter and Summer solstices, respectively, when their medicinal properties are considered to be at their peak.

Er Zhi Wan Explained
Formula:
The formula is very simple, consisting of only two herbs:
Glossy Privet Fruit (Nǚ Zhēn Zǐ) (Principal herb): Has sweet and bitter properties, and a cooling nature. It nourishes the liver and kidney yin, clears deficiency heat, and is used to darken hair and improve eyesight.
Eclipta (Hàn Lián Cǎo) (Assistant herb): Has sweet, sour properties, and a cooling nature. It nourishes the liver and kidney yin, cools the blood to stop bleeding, and can also eliminate dampness and relieve itching.
Together, these herbs work to nourish the liver and kidneys, and clear deficiency heat.
What it Treats (Pathology):
The Er Zhi Wan mainly targets a condition called "liver and kidney yin deficiency." In Traditional Chinese Medicine, the liver stores blood, and the kidneys store essence (a vital substance).
The liver and kidneys nourish each other. Long-term fatigue, staying up late, and emotional stress can deplete the yin fluids of the liver and kidneys, leading to this deficiency. When yin is deficient, yang (the opposite force) becomes excessive, causing internal heat and various symptoms.
Liver and kidney yin deficiency can cause problems throughout the body. It can lead to dizziness, blurred vision, and tinnitus (ringing in the ears).
It can also disturb the mind, causing insomnia, restless sleep, irritability, and lead to weak lower back and knees. In men, it can lead to seminal emission and premature ejaculation.
Symptoms it Helps:
The Er Zhi Wan is mainly used for liver and kidney yin deficiency, which can show up as:
Dizziness and blurred vision
Insomnia and restless sleep
Dry mouth and throat
Weakness and soreness in the lower back and knees
Weakness in the legs
Seminal emission
Premature graying of hair
A thin, rapid pulse
These symptoms all point to a core problem: a shortage of yin fluids in the liver and kidneys.

How it Works:
The Er Zhi Wan combines glossy privet fruit and Eclipta to nourish the liver and kidney yin. Glossy privet fruit nourishes the liver and kidneys, and replenishes essence and blood.
Eclipta cools the blood, stops bleeding, and also nourishes the liver and kidneys. Working together, these herbs effectively replenish the yin fluids, restoring balance and correcting the underlying problem of liver and kidney yin deficiency. When the yin fluids are sufficient and balance is restored, the symptoms are relieved or eliminated.
The main function of the Two-Essence Pill is to nourish the liver and kidney yin. By nourishing these yin fluids, it can improve the symptoms and restore health and vitality.
Specifically, the Two-Essence Pill can:
Nourish Yin and Replenish Kidneys: Replenish liver and kidney yin fluids.
Darken Hair and Improve Eyesight: Nourish essence and blood, making hair dark and shiny, and improving vision.
Strengthen Bones and Tendons: Nourish the liver and kidneys, strengthening bones and tendons.
Calm the Mind and Improve Sleep: Nourish the heart and spirit, calming the mind and improving sleep.
Slow Down Aging: Replenish essence and blood, slowing down the aging process.
Modern Uses:
Modern research shows that the Two-Essence Pill has various medicinal effects and can be used to treat:
Neurasthenia (Nerve Weakness): It can nourish the nerves and improve symptoms like insomnia, forgetfulness, and dizziness.
High Blood Pressure: It can regulate the endocrine system, lower blood pressure, and relieve headaches and dizziness caused by high blood pressure.
Chronic Hepatitis: It can protect the liver, promote the repair of liver cells, and improve symptoms like fatigue and poor appetite.
Systemic Lupus Erythematosus: It can regulate the immune system and relieve symptoms.
Leukopenia (Low White Blood Cell Count): It can be used for leukopenia caused by chemotherapy and radiation therapy.
Important Notes:
While the Er Zhi Wan has many benefits, keep these points in mind:
Diagnosis is Key: This formula is for liver and kidney yin deficiency only, not for other conditions. Consult a Traditional Chinese Medicine practitioner for a proper diagnosis before use.
Pregnancy: Pregnant women should use it with caution and under the guidance of a doctor.
Avoid During Colds: Avoid using during a cold.
The Er Zhi Wan is a valuable part of the Traditional Chinese Medicine treasure. With its simple formula and noticeable effects, it brings health and hope. In today's world, where people face a lot of stress, liver and kidney yin deficiency is common.
Using the Two-Essence Pill appropriately can nourish the liver and kidneys, slow down aging, and improve quality of life. However, remember to consult a Traditional Chinese Medicine practitioner before use to ensure safety and effectiveness.