Quick Facts
| Latin Name | Eucommiae Cortex |
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| Chinese Name & Pinyin | 鹽杜仲 · Yan Du Zhong |
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| Medicinal Part | Tree barks and root barks |
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| Efficacy Category | Tonifying |
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| Botanical Origin | The dried bark of Eucommia ulmoides Oliv. (Eucommiaceae), processed with saltwater. |
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| Nature & Flavour | Sweet; Warm |
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| Channels Entered | Liver, Kidney |
What Is Yan Du Zhong?
Yan Du Zhong (Salt-processed Eucommia Bark) is a medicinal herb of Traditional Chinese Medicine.
Primarily produced in Guizhou, Sichuan, Yunnan, Shaanxi, Hubei, Henan.
Nature & Flavour: Sweet; Warm
Channels Entered: Liver, Kidney
Yan Du Zhong: Materia Medica Profile
Identification & Quality Standard
Eucommiae Cortex
Botanical Origin
The dried bark of Eucommia ulmoides Oliv. (Eucommiaceae), processed with saltwater.
Production Regions
Primarily produced in Guizhou, Sichuan, Yunnan, Shaanxi, Hubei, Henan.
Quality Requirements
Superior is thick, large, broken with many white fibers.
Macroscopic Features
Flat plate or丝状. After salt processing, surface is dark brown. Broken surface has silver-white elastic fibers. Salty taste.
Traditional TCM Properties
Sweet; WarmLiverKidney
Traditional Functions
Supplements liver and kidney, strengthens bones and sinews, calms the fetus.
How Yan Du Zhong Is Used in TCM
In the Chinese materia medica, Yan Du Zhong is classified among the Tonifying herbs.
Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.