
Eucommia ulmoides
Also known as Eucommia Bark, Gutta-percha Tree Bark.
Du Zhong acts primarily as: Liver/Kidney tonic, Antihypertensive, Anti-osteoporotic, Anti-inflammatory, Antioxidant, Immunomodulatory, Pregnancy-supportive (threatened miscarriage). Secondary actions include Tonify Liver and Kidney, Strengthen sinews and bones, Calm the fetus, Lower blood pressure.

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| Preparation | As written | Metric |
|---|---|---|
| Dried bark decoction | Dried bark decoction: 6-15 g/day (often dry-fried for back/kidney use) | 6000-15000 mg |
| Tincture (1:5) | Tincture (1:5): 2-5 ml three times daily | 2-5 mL |
| Powder/capsule | Powder/capsule: 1-3 g/day | 1000-3000 mg |
Doses are reproduced from the sources for practitioners and are not a recommendation for any person.
primary-actions. Du Zhong acts primarily as: Liver/Kidney tonic, Antihypertensive, Anti-osteoporotic, Anti-inflammatory, Antioxidant, Immunomodulatory, Pregnancy-supportive (threatened miscarriage). Secondary actions include Tonify Liver and Kidney, Strengthen sinews and bones, Calm the fetus, Lower blood pressure.
indications. Du Zhong is traditionally indicated for: Liver and Kidney deficiency, Sore weak low back and knees, Stiffness and weakness of joints, Osteoporosis and bone fragility, Fatigue, Frequent urination, Dizziness, Hypertension, Threatened miscarriage with low back pain and vaginal bleeding, Restless fetus, Impotence.
dose-reference. Reference preparation/dosing for Du Zhong: Dried bark decoction: 6-15 g/day (often dry-fried for back/kidney use); Tincture (1:5): 2-5 ml three times daily; Powder/capsule: 1-3 g/day
safety-cautions. Du Zhong - Contraindications: Yin deficiency with marked heat signs (use with yin tonics), Otherwise broadly safe, Monitor with antihypertensive drugs (additive lowering) | Side effects: Rare mild GI upset, Well tolerated, Dizziness if blood pressure lowered excessively when combined with antihypertensives.
Du Zhong stands in 47 documented formulas in the library, among them jia wèi sì wù tàng, dàng guì dì huáng yin, dà bũ yuán jiàn, dà zào wán, wú bi shân yào wán, yòu gui wán.

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