Eucommia

BotanicalBest with a meal

What is it

Eucommia (Eucommia ulmoides), known as Du Zhong in Traditional Chinese Medicine, is a deciduous tree native to China whose bark is one of the most important herbs for kidney and liver function in TCM. It is commonly used for joint health and to support back and knee strength.

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Mild hypertension

Limited Evidence

Small clinical studies suggest eucommia extract may produce modest reductions in blood pressure. Evidence is preliminary and trial quality varies.

Joint and bone support

Limited Evidence

Used traditionally and supported by limited preclinical and small clinical studies for connective tissue and bone health. Rigorous human evidence is sparse.

How it works

Eucommia bark contains lignans (pinoresinol diglucoside), iridoids (aucubin), phenolic compounds (chlorogenic acid), and minerals. In animal studies these compounds show antihypertensive, bone-supportive, and anti-inflammatory effects. Some research suggests effects on collagen synthesis that may explain traditional use for connective tissue support. Clinical research in humans has examined eucommia for mild hypertension and bone health, with small studies showing modest benefits. Mechanism proposed for the antihypertensive effect involves vasodilation and a potential modest diuretic action.

Dosage

Traditional decoction: 6-15 grams of dried bark daily. Modern extracts vary; concentrated capsule extracts typically 250-500 mg, 2-3 times daily. DSLD label data did not include a median dose.

When and how to take it

WHEN: 2-3 times daily, often with meals. Traditional decoctions are taken warm. HOW: As decoction (bark boiled in water), tincture, granule, or capsule. Often used in combination formulas.

3 commercial forms

Compare the main delivery options and what they’re best suited for.

Dried bark (raw or fried)

Used in decoctions.

Salt-fried preparation is traditional for kidney support.

Standardized extract (capsule)

Modern convenient form.

Concentrated; doses vary.

Leaf extract

Alternative to bark; sustainable harvesting.

Modern source; lower in some constituents than bark.

Safety

Generally well tolerated in traditional use. Some reports of mild GI upset. Long-term safety data are limited but the herb has centuries of traditional use.

Who should be cautious

Use caution in pregnancy and lactation (limited safety data, although traditionally used in some pregnancy formulas). People on antihypertensive or anticoagulant medications should consult a clinician. Discontinue if rash or other reactions develop.

Interactions

Potential additive effects with blood pressure medications - monitor blood pressure if taking together. Theoretical interaction with anticoagulants. Discuss use with your clinician.

Frequently asked questions

Is eucommia safe long-term?⌄

Used traditionally for centuries with a good safety record. Detailed long-term modern safety studies are limited; consult a clinician for chronic use.

Can eucommia replace blood pressure medication?⌄

No. Modest preliminary evidence does not justify replacing prescribed antihypertensive therapy. Discuss any addition with your clinician.

References

Eucommia on Wikidata — Wikidata link

Eucommia on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Eucommia (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.