☯ TCM Properties
Relieves the Exterior, induces sweat, expels Wind-Dampness, promotes urination and alleviates pain; Eliminates toxins, treats sores and carbuncles and relieves swelling topically and internally; Enhances the functions of the Kidney and Liver channels, increases the libido and treats wasting and thirsting; Anti-cancer
Traditional Chinese Uses
Ba Qia is the rhizome of Smilax china (Rhizoma Smilacis Chinensis, also called Jin Gang Teng), a prickly greenbrier vine, used among the wind-damp-dispelling medicinals. Sweet and sour with a neutral nature, entering the Liver and Kidney channels, it dispels Wind-Dampness, frees the channels, promotes urination, resolves toxicity and reduces swelling. It is a classic remedy for wind-damp painful obstruction (bi) with joint aches and stiffness, and for Damp-Heat and toxin conditions — chronic pelvic inflammation and abnormal vaginal discharge, urinary difficulty, gout and rheumatism, dysentery, and Heat-toxin sores, carbuncles and swellings.
It is decocted or soaked in wine, made into pills or powder, and often paired with other Damp-clearing and detoxifying herbs. It has also featured in traditional formulas for scrofula and, historically, for syphilitic sores.
Botanical Description
Smilax china is a perennial, deciduous climbing vine of the Smilacaceae, native to East and Southeast Asia. It produces tough, prickly stems that scramble several metres over shrubs and trees, supported by paired tendrils arising from the petiole base. The leaves are alternate, broadly ovate to nearly orbicular, leathery, with three to five prominent arcuate veins. Small yellow-green flowers appear in axillary umbels in spring, followed by glossy red berries about 6–8 mm across. The medicinal organ is the large, woody, knotty rhizome (often called 'China-root'), reddish-brown externally and pale within. The plant favors thickets, hillsides, and forest margins. It is one of the Asian congeners of the Western 'sarsaparilla' group.
Active Constituents
Astilbin
Dihydroflavonol glycosideConcentration: Major marker flavonoid of the rhizome
A principal bioactive with anti-inflammatory, immunomodulatory, hepatoprotective and anti-hyperuricemic activity, consistent with the traditional use of the rhizome for gout, dampness and rheumatic swelling.
Engeletin (and isoengeletin)
Dihydroflavonol glycosideConcentration: Characteristic flavonoid
Anti-inflammatory and antioxidant flavonoid glycoside co-occurring with astilbin; inhibits inflammatory signalling in experimental models.
Resveratrol and oxyresveratrol
StilbenesConcentration: Minor bioactive stilbenes
Antioxidant and anti-inflammatory stilbenes contributing to the radical-scavenging and anti-proliferative activity of rhizome extracts.
Piceid (polydatin) and scirpusin A
Stilbene glycoside / stilbene dimerConcentration: Minor
Stilbene derivatives with antioxidant activity; scirpusin A is a resveratrol dimer among the more potent radical scavengers of the rhizome.
Steroidal saponins (dioscin and related smilax saponins)
Steroidal saponinsConcentration: Characteristic of the genus Smilax
Contribute anti-inflammatory, antitumour and antimicrobial activity and part of the detoxifying, dampness-resolving reputation of the herb.
Flavonols (quercetin, kaempferol, dihydrokaempferol glycosides)
FlavonoidsConcentration: Variable
Antioxidant flavonoids adding to the overall free-radical-scavenging capacity of the extract.
Chlorogenic acid
Phenolic acid (hydroxycinnamate ester)Concentration: Minor
Antioxidant and anti-inflammatory phenolic acid identified among the main constituents in bioactivity studies of the rhizome.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 9-15g | Daily | — | — | — |
Preparation Methods
Raw rhizome decoction
Parts: rhizome
The dried, sliced rhizome (typical dose ~10-30 g, up to larger amounts in traditional practice) is decocted in water for gout, rheumatic pain, damp-heat sores and pelvic inflammation. Longer simmering is used to extract the flavonoid and saponin fraction.
Medicinal-wine / external wash
Parts: rhizome
Traditionally steeped in rice wine for wind-damp joint pain, or the strong decoction is used externally as a wash and poultice for carbuncles, sores and skin swellings.
Historical Texts
Ming Yi Bie Lu (Miscellaneous Records of Famous Physicians), attributed to Tao Hongjing
Southern and Northern Dynasties, c. 500 CEBen Cao Gang Mu (Compendium of Materia Medica), Li Shizhen
Ming dynasty, 1578References
- Wu H, et al.. Antioxidant and anti-proliferative activity of Rhizoma Smilacis Chinae extracts and main constituents . Food Chemistry, 133(1):140-145 (2012) [DOI]
- Chinese Pharmacopoeia Commission. Pharmacopoeia of the People's Republic of China (Rhizoma Smilacis Chinensis, Ba Qia) . China Medical Science Press (2020) [DOI]
- Zhonghua Bencao editorial committee. Zhonghua Bencao (Encyclopedia of Chinese Materia Medica) - Ba Qia monograph . Shanghai Scientific and Technical Publishers (1999) [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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