Mu Xiang
StarAucklandia lappa Decne.
Traditionally used for
- Digestion
- Bowel health
- Energy & fatigue
☯ TCM Properties
Moves Qi and Alleviates Pain; Strengthens the Spleen and Promotes Digestion; Regulates Qi Flow in the Chest, Abdomen and Lower Body; Promotes Qi Movement in the San Jiao
Traditional Chinese Uses
Mu Xiang (costus root, saussurea root) is one of the most widely used Qi-moving herbs in Chinese medicine, prized for its strong aromatic quality and ability to relieve digestive discomfort. It moves Qi throughout the digestive tract to address abdominal bloating, cramping, diarrhea with urgency, poor appetite, and nausea — especially when these arise from Qi stagnation with dampness. Its warming, moving nature also supports the formulation of tonic herbs by preventing them from clogging digestion.
Western Herbalism Properties
Used In Formulas (7)
Relationships
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Botanical Description
Aucklandia lappa (synonyms Saussurea costus, S. lappa) is a robust perennial herb in the family Asteraceae, native to the moist, open subalpine slopes and meadows of the western Himalayas, particularly Kashmir, Himachal Pradesh, and adjacent areas, at elevations of 2500-3500 m. The plant produces a stout, fragrant, vertical taproot 30-60 cm long that exudes a characteristic balsamic, woody aroma. The aerial stems reach 1-2 m, bearing very large, ovate to triangular basal leaves up to 50 cm long with irregularly toothed margins, long winged petioles, and a rough surface. Stem leaves are progressively smaller and amplexicaul. Dark purple to almost black tubular florets are packed into hard, spiny, globose flower heads 3-4 cm across, clustered at the stem tips in late summer. The species is critically endangered in the wild and is listed under CITES Appendix I.
Active Constituents
Costunolide
Sesquiterpene lactone (guaiane/germacranolide type)Concentration: Major bioactive; a principal marker of the essential oil
A key active sesquiterpene lactone with anti-inflammatory (NF-kB inhibition), gastroprotective, choleretic, antispasmodic and anticancer activity. Together with dehydrocostuslactone it is used as a pharmacopoeial quality marker.
Dehydrocostus lactone (dehydrocostuslactone)
Sesquiterpene lactone (guaianolide)Concentration: Major bioactive marker, co-dominant with costunolide
Regulates gastrointestinal smooth-muscle motility, promotes bile flow and shows anti-inflammatory, antibacterial and antitumor activity; a defining constituent of the root's activity.
Essential oil (volatile terpenoids)
Volatile oil / terpenoid mixtureConcentration: Roughly 1-3% of the dried root
The aromatic volatile fraction (rich in sesquiterpene lactones and terpenes) underlies the qi-moving, digestive and carminative actions and the herb's characteristic aroma.
Saussureamines / alkaloids
AlkaloidConcentration: Minor constituents
Minor nitrogenous compounds reported from the root that contribute to gastroprotective and smooth-muscle effects.
Costus lactone / other sesquiterpenes (e.g., costol, alpha-costene)
SesquiterpeneConcentration: Minor volatile components
Additional sesquiterpenes of the volatile oil that add to the anti-inflammatory and antimicrobial profile of the crude drug.
Lignans and flavonoids
Lignan / flavonoidConcentration: Minor polar constituents
Antioxidant polar constituents that supplement the anti-inflammatory activity of the sesquiterpene-rich oil.
⚠ Drug Interactions
Gastrointestinal prokinetics / antispasmodics
Costunolide and dehydrocostuslactone modulate gastrointestinal smooth-muscle contraction and gastric emptying, so combined use with prokinetic or antispasmodic drugs could produce additive effects on motility.
Clinical note: Generally minor; monitor for altered bowel motility if used with agents that affect gut motility.
CYP-metabolized drugs
Sesquiterpene lactones from Aucklandia can modulate cytochrome P450 activity in vitro; theoretical interference with the clearance of co-administered CYP substrates.
Clinical note: Clinical relevance unproven at typical dietary/decoction doses; consider only with narrow-therapeutic-index drugs.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 3–6 g | Daily | — | — | 中国药典 2020 【用法与用量】3～6g。 【性味与归经】辛、苦，温。归脾、胃、大肠、三焦、胆经。 — Chinese Pharmacopoeia 2020, quoted verbatim; route and cautions preserved. Replaces a cleared category-filler value. |
Preparation Methods
Water decoction (added near end / hou xia)
Parts: root
About 3-9 g of the dried root; because the active volatile oil is heat-labile it is traditionally added late in decoction. Used to move qi, relieve abdominal and epigastric distension and pain, and harmonize the middle burner.
Raw vs. bran/dry-fried (wei/roasted) preparation
Parts: root
Raw Mu Xiang more strongly moves qi and relieves pain; the roasted/bran-fried form (wei mu xiang) is preferred to bind the intestines and stop diarrhea and dysenteric disorders.
Component of formulas (e.g., Xiang Sha Liu Jun Zi Tang, Xiang Lian Wan)
Parts: root
Combined with Coptis (in Xiang Lian pill) for damp-heat diarrhea and dysentery, or with Sha Ren and tonic herbs for Spleen qi deficiency with poor appetite and distension. Note: true Mu Xiang (Aucklandia/Saussurea costus) is CITES Appendix I listed; sustainably cultivated sources and species substitutions (e.g., Yun Mu Xiang) should be used, and wild-collected Saussurea costus is subject to international trade restrictions.
Dui Yao — Herb Pairs
The classical two-herb combinations this herb appears in, each with an action neither herb has alone.
Moving qi to stop pain combined with directing qi downward and reducing accumulation, the pair relieves abdominal distension, tenesmus and food or damp-heat stagnation.
Accumulation with distending pain, constipation or dysentery with tenesmus.
Core pair of a classical formula — Mu Xiang Bing Lang Wan, Ru Men Shi Qin (Zhang Congzheng)
Together they clear damp-heat from the intestines while moving qi to relieve abdominal pain and tenesmus.
Classic indication: damp-heat dysentery with abdominal pain and tenesmus; the pair forms Xiang Lian Wan.
Named pairing — Lu Jingshan, Shi Jinmo Dui Yao
Move qi, awaken the spleen and harmonize the stomach, relieving distention and pain from qi stagnation with dampness.
Seen in Xiang Sha Liu Jun Zi Tang for spleen deficiency with qi stagnation.
Named pairing — Lü Jingshan, Shi Jinmo Dui Yao
Evidence Tier
Limited evidence · 2 studiesRecorded studies by study design, strongest design at the top. This is a study-design tier only, not a GRADE rating: it does not weigh risk of bias, consistency or precision.
Systematic review / meta-analysis
0
Randomized controlled trial
0
Other clinical trial
0
Observational / case report
0
In vitro / animal
1
1 verified · 0 unverified
Other / unclassified
1
1 verified · 0 unverified
Verified: design read from PubMed for a DOI that resolves to the cited paper Unverified: taken from the study's recorded description
Clinical Studies
Aucklandia lappa Decne.: a review of its botany, cultivation, ethnopharmacology, phytochemistry, pharmacology, and practical applications
A comprehensive review summarizing the chemistry (costunolide, dehydrocostuslactone and other sesquiterpene lactones) and pharmacology of Mu Xiang, including gastrointestinal-motility regulation, anti-inflammatory (NF-kB), antibacterial, choleretic and antitumor activities that underpin its traditional qi-regulating and digestive uses.
Pharmacokinetic study on costunolide and dehydrocostuslactone after oral administration of traditional medicine Aucklandia lappa Decne. by LC/MS/MS
An LC-MS/MS pharmacokinetic study characterized the absorption and disposition of the two principal sesquiterpene lactones after oral administration of Aucklandia lappa extract, providing quantitative in-vivo exposure data for its main markers.
Historical Texts
Shen Nong Ben Cao Jing (Divine Farmer's Materia Medica)
Han dynasty, c. 200 CEBen Cao Gang Mu (Compendium of Materia Medica), Li Shizhen
Ming dynasty, 1578 CEReferences
- Frontiers in Pharmacology review authors. Aucklandia lappa Decne.: a review of its botany, cultivation, ethnopharmacology, phytochemistry, pharmacology, and practical applications . Frontiers in Pharmacology (2025) [DOI]
- Zhang J, Hu X, Gao W, Qu Z, Guo H, Liu Z, Liu C. Pharmacokinetic study on costunolide and dehydrocostuslactone after oral administration of traditional medicine Aucklandia lappa Decne. by LC/MS/MS . Journal of Ethnopharmacology (2014) [DOI]
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.
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