Huang Jie Zi
StarBrassica juncea (L.) Czern. et Coss.
☯ TCM Properties
Warms the Lungs and Transforms Phlegm-Fluids; Regulates Qi and Transforms Phlegm; Disperses nodules and unblocks the collaterals; Alleviates Pain; Warms the Interior and Dispels Cold; Resolves Toxicity and Reduces Swelling
Traditional Chinese Uses
Huang Jie Zi (brown mustard seed) is a warm, pungent herb used to warm the Lungs and break up cold Phlegm accumulations in the chest. It is used for cough with copious white or clear sputum, chest and rib-side pain from Phlegm obstructing the channels, and joint pain or numbness caused by cold Phlegm in the sinew and channels. Applied externally as a poultice, it draws warmth to an area and is used for cold-type muscle pain and deep-seated cold abscesses.
Western Herbalism Properties
Botanical Description
Brassica juncea (L.) Czern. et Coss. (Brassicaceae), brown or Indian mustard, is an annual herb growing 30-150 cm tall with erect, branched stems bearing pinnately lobed lower leaves and smaller, narrower upper leaves. The plant produces racemes of small, four-petaled yellow flowers that mature into slender siliques containing round, reddish-brown to yellow seeds. Native to Central Asia and widely cultivated throughout China, India, and Europe, it tolerates a range of soils and climates. The pungent seeds (Huang Jie Zi) contain sinigrin, which hydrolyzes to release the volatile mustard oil allyl isothiocyanate, giving them their characteristic sharp, warming flavor used as condiment, oilseed, and medicine in Chinese, Ayurvedic, and Western herbal traditions.
Active Constituents
Sinigrin (allyl glucosinolate)
GlucosinolateConcentration: The predominant glucosinolate of brown/oriental mustard seed
The main glucosinolate precursor; on tissue disruption it is hydrolysed by myrosinase to the pungent, biologically active allyl isothiocyanate.
Allyl isothiocyanate (AITC)
Isothiocyanate (mustard oil)Concentration: Chief hydrolysis product; principal component of the pungent mustard oil
A powerful counterirritant and rubefacient that activates TRPA1 receptors, increasing local blood flow; responsible for the warming, phlegm-transforming and topical pain-relieving actions and for the blistering risk of mustard plasters.
Myrosinase
Thioglucosidase enzymeConcentration: Present in seed, released on crushing/hydration
The enzyme that hydrolyses sinigrin to allyl isothiocyanate when the seed is broken and moistened, generating the active pungent principle.
Sinapine / sinapic acid
Phenolic (hydroxycinnamic acid and its choline ester)Concentration: Major phenolic of the seed
Antioxidant phenolic compounds contributing to the seed's radical-scavenging capacity.
Fixed (fatty) oil - erucic, oleic and linoleic acids
Triacylglycerols / fatty acidsConcentration: ~30-40% of the seed as fixed oil
The seed's fatty oil provides bulk and emollient properties and carries the lipophilic constituents in preparations.
Flavonoids (kaempferol and isorhamnetin glycosides)
Flavonol glycosidesConcentration: Minor constituents of the seed
Antioxidant flavonoids adding to the overall phytochemical profile of the seed.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 6-15g | Daily | — | — | — |
Preparation Methods
Decoction (internal)
Parts: Ripe seeds (often stir-fried/dry-fried)
The seeds, frequently stir-fried, are decocted (typically ~3-9 g) to warm the Lungs, transform cold phlegm and dispel phlegm from the channels and collaterals. The seeds are usually added late/crushed to preserve activity.
Mustard plaster / poultice (topical)
Parts: Powdered seed
Powdered mustard seed mixed with flour and warm (not hot) water is spread on cloth and applied briefly to the skin over the chest or painful joints as a counterirritant. Contact beyond a few minutes can cause blistering, so application is kept short and monitored.
Ground powder for medicated paste
Parts: Seed powder
Finely ground seed is incorporated into pastes for topical application to disperse nodules and unblock the collaterals in painful, cold-damp conditions.
Historical Texts
Ming Yi Bie Lu (Miscellaneous Records of Famous Physicians), attrib. Tao Hongjing
circa 500 CE (Southern and Northern Dynasties)Ben Cao Gang Mu (Compendium of Materia Medica), Li Shizhen
Ming dynasty (1578)References
- Rahman M, Khatun A, Liu L, Barkla BJ. Brassica juncea: Phytochemistry and biological activity of mustard (a review) . CyTA - Journal of Food (2020) [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.
📝 Notes
Public notes from the community and your own private notes on Huang Jie Zi.
No notes yet.