Loading
New to this? Read about Four Natures & Five Flavors and Channel Tropism
The dried bark of Eucommia ulmoides (Eucommiaceae). Enters the Liver and Kidney channels. Sweet and warm, it is the key herb for supplementing the Liver and Kidney, strengthening sinews and bones, and calming the fetus. It treats Liver-Kidney insufficiency with lumbar-knee soreness and threatened miscarriage, and additionally lowers blood pressure. Clinically it is usually salt-processed (yan du zhong) to direct its action to the Kidney.
偏于降血压、强筋骨
引药入肾，增强补肝肾、强筋骨、安胎之功，临床多用此
易于煎出有效成分，破坏胶丝便于煎服
煎服6–10g。盐炙后入药为多。
Reference range for non-pregnant adults. Not a personalized prescription. Pregnancy, lactation, and pediatric use require specialist supervision.
Documented interactions exist with the following Western drug classes. Click to view mechanism, severity, and clinical recommendations.
Protective guidance only — when to avoid or use with caution. This block deliberately omits pregnancy, lactation, and pediatric dosing: any such use must be managed by a qualified TCM practitioner or appropriate specialist.
阴虚火旺者慎用。生杜仲偏于降压、强筋骨；炒杜仲（盐炒）则补肝肾、安胎之力强，二者不可混用。
炮制时须炒至断丝，方便有效成分煎出。阴虚火旺者慎用。生品与盐炙品功效有别，临床须区分。
味辛，平。主腰脊痛，补中，益精气，坚筋骨，强志，除阴下痒湿，小便余沥。久服轻身耐老。
上品
@misc{bencaodian-du-zhong,
author = {{Bencaodian Editorial}},
title = {Dù Zhòng 杜仲 (Eucommia Bark) — Eucommiae Cortex},
year = {2026},
howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine},
url = {https://bencaodian.org/en/herbs/du-zhong},
urldate = {2026-04-17},
note = {CC BY-SA 4.0}
}© Bencaodian Editorial · Licensed under CC BY-SA 4.0
杜仲含木脂素类（松脂醇二葡萄糖苷）、环烯醚萜（桃叶珊瑚苷）及绿原酸，药理确证其降压、骨代谢调节与免疫调节作用。
Duzhong contains lignans (pinoresinol diglucoside), iridoids (aucubin) and chlorogenic acid; pharmacology confirms antihypertensive, bone-metabolism and immunomodulatory effects.
《中国药典》以松脂醇二葡萄糖苷作为含量测定指标。
Chinese Pharmacopoeia uses pinoresinol diglucoside as the assay marker.
传统为补肝肾、强筋骨、安胎要药；现代以炒杜仲降压作用较佳。
Classical herb to tonify liver-kidney, strengthen sinews and calm fetus; salt-fried form preferred for hypertension.
WHO 收录本品降压作用证据与传统使用。
WHO monograph reviews antihypertensive evidence and traditional use.
This section is provided for academic reference only and does not constitute medical advice.