Ba Jiao Hui Xiang
StarIllicium verum Hook. f.
Traditionally used for
- Cough & breathing
- Digestion
- Pain & joints
Cautions & contraindications
- Pregnancy
- Young children
☯ TCM Properties
Warms Yang and Disperses Cold; Moves Qi and Alleviates Pain; Warms the Liver and Kidneys; Warms the Middle Burner and Stops Vomiting
Traditional Chinese Uses
Ba Jiao Hui Xiang (star anise) is a warm, sweet-pungent aromatic spice-herb used in Chinese medicine to warm the lower burner and Kidney Yang, dispel cold and move Qi. Its primary role is for cold-type pain in the lower abdomen and lower back — including hernia pain, cold stomach pain, and Kidney-area back pain from cold obstruction. As a beloved culinary spice widely used in Chinese cooking, it demonstrates the seamless relationship between food flavoring and medicinal action in the Chinese herbal tradition.
Western Herbalism Properties
Relationships
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Botanical Description
Illicium verum, star anise or Ba Jiao Hui Xiang, is a small to medium-sized evergreen tree in the Schisandraceae, native to southwestern China and northern Vietnam, where it grows in subtropical mountain forests and is also cultivated. The tree reaches 8 to 15 meters in height with a slender, pyramidal crown, smooth grey-white bark and aromatic wood. The alternate leaves are leathery, lanceolate to elliptic, 5 to 15 cm long, glossy dark green above and paler beneath, with prominent oil glands. Solitary flowers arise in the leaf axils, 1 to 1.5 cm across, with numerous narrow pink to dark red tepals. The most distinctive feature is the fruit: a star-shaped aggregate of usually eight woody, boat-shaped follicles arranged radially around a central axis, each containing a single shiny brown seed, and turning reddish-brown when mature. The whole fruit is intensely aromatic from its rich content of trans-anethole and is the principal commercial source of shikimic acid.
Active Constituents
trans-Anethole
Phenylpropene (aromatic ether)Concentration: Dominant constituent of the fruit essential oil, commonly reported at 80 to 90 percent of the oil
The compound responsible for the aniseed odour and taste and for most of the drug's carminative and antispasmodic action. It has documented antifungal and antibacterial activity in vitro and produces anxiolytic-like effects in mice at pharmacological doses. It is also the constituent by which the oil is standardised commercially.
Shikimic acid
Cyclohexene carboxylic acidConcentration: Present at several percent of the dried fruit; star anise is the principal industrial source
The starting material from which oseltamivir is manufactured. It has no antiviral activity itself and is not converted to oseltamivir in the body, so drinking star anise tea does not deliver an antiviral drug, a misconception that circulated widely during influenza pandemics. Shikimic acid also acts as an allelochemical in the plant.
Estragole (methyl chavicol)
Phenylpropene (aromatic ether)Concentration: A minor constituent of the essential oil, typically well below the anethole content
An isomer of anethole that is metabolically activated to a genotoxic 1-hydroxy metabolite and is a rodent hepatocarcinogen at high dose. Its presence is the reason regulators limit prolonged high-dose intake of anethole-rich essential oils rather than the culinary use of the spice.
Limonene and linalool
Monoterpene and monoterpene alcoholSecondary volatiles of the fruit oil which contribute to the aroma profile and to the antimicrobial activity of the whole oil, and which are used together with anethole in the chromatographic fingerprint that authenticates the spice.
Veranisatins A, B and C
Seco-prezizaane-type sesquiterpene lactonesConcentration: Trace constituents of the fruit of Illicium verum itself
The uncomfortable finding about genuine Chinese star anise: it carries small quantities of its own neurotoxic sesquiterpene lactones, isolated as convulsants and neurotropic components from Illicium verum fruit and reported to cause convulsions and death in mice at milligram-per-kilogram oral doses. At culinary quantities this is of no consequence, but it means that heavy or repeated dosing of star anise infusions is not risk-free even when the species is correct and the material is unadulterated.
⚠ Drug Interactions
Japanese star anise (Illicium anisatum L., shikimi), and by extension Illicium lanceolatum and Illicium henryi
This is the critical hazard of star anise and it is a species substitution rather than a drug interaction in the usual sense. Illicium anisatum fruit is morphologically similar to Illicium verum and is not edible: it contains anisatin, a seco-prezizaane sesquiterpene lactone isolated in 1952 as its convulsant principle and shown in 1981 to be a potent non-competitive GABA antagonist acting at the picrotoxin site of the GABA-A receptor. Blocking inhibitory chloride conductance produces vomiting, jitteriness, nystagmus, hypertonia and generalised seizures. Chemical analysis of star anise implicated in infant neurotoxicity found the material to be a mixture of Illicium verum and Illicium anisatum. Clusters of poisoned infants given star anise tea for colic have been reported from the United States, Spain, France and the Netherlands, prompting a Food and Drug Administration advisory in 2003 and product recalls in several countries. The two species can be separated on anatomical characters and by chemical fingerprinting, but not reliably by eye in ground or broken material.
Clinical note: Never recommend star anise tea for infants or young children for colic or for any other indication, whatever the labelled species. For adult use, source only from suppliers who test for anisatin or who provide species authentication, and treat broken, ground or loose material as unverifiable. In an infant presenting with unexplained seizures, jitteriness, nystagmus or an apparent life-threatening event, ask directly whether a herbal tea has been given.
Oseltamivir and other influenza antivirals
Star anise is the industrial source of shikimic acid, from which oseltamivir is synthesised chemically. Shikimic acid is not a prodrug of oseltamivir and no metabolic route converts it to the active carboxylate in humans. The clinically relevant hazard is behavioural rather than pharmacokinetic: during influenza scares the shikimic acid connection has driven consumption of star anise teas as an antiviral substitute, at doses far above culinary quantities and from unverified sources, which raises exposure to the adulteration hazard above.
Clinical note: Tell patients plainly that star anise tea is not oseltamivir and confers no antiviral protection, and that the high intakes involved increase rather than reduce risk.
Long-term high-dose anethole-rich essential oil preparations
Star anise oil contains estragole, which is bioactivated by hepatic sulfotransferase to a reactive ester that binds DNA, and which is carcinogenic in rodent bioassay. The exposure from ordinary culinary use of the whole spice is small; the exposure from concentrated essential oil taken daily over months is not. The concern applies to the isolated oil rather than to the decocted fruit in a herbal formula.
Clinical note: Do not use star anise essential oil internally at concentrated doses over prolonged periods, and avoid it altogether in pregnancy and in children.
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，温。归肝、肾、脾、胃经。 — Chinese Pharmacopoeia 2020, quoted verbatim; route and cautions preserved. Replaces a cleared category-filler value. |
Evidence Tier
Strong evidence · 12 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
1
0 verified · 1 unverified
Randomized controlled trial
0
Other clinical trial
0
Observational / case report
3
2 verified · 1 unverified
In vitro / animal
7
4 verified · 3 unverified
Show 7 studies
- Anisatin, a potent GABA antagonist, isolated from Illicium anisatum
- On the Toxin of Illicium Anisatum. I. The Isolation and Characterization of a Convulsant Principle: Anisatin
- Convulsants from Star Anise (Illicium verum HOOK.F.).
- Neurotropic Components from Star Anise(Illicium verum HooK. fil.).
- Illicium verum Hook. f. and Illicium anisatum L.: Anatomical Characters and their Value for Differentiation
- Antifungal Activity of the Essential Oil of Illicium verum Fruit and Its Main Component trans-Anethole
- Anxiolytic-Like Effect of Illicium verum Fruit Oil, trans-Anethole and Related Compounds in Mice
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
Neurotoxicities in Infants Seen With the Consumption of Star Anise Tea
The defining clinical report of the hazard: a series of infants who developed neurological symptoms including seizures, jitteriness, vomiting and nystagmus after being given star anise tea. The paper attributes the toxicity to contamination of Chinese star anise with Japanese star anise and is the basis for the advice never to give star anise preparations to infants.
Chemical Composition of Chinese Star Anise (Illicium verum) and Neurotoxicity in Infants
Reports the chemical analysis of the star anise material implicated in the infant cases, showing it to be a mixture of Illicium verum with the neurotoxic Illicium anisatum. This is the analytical link between the clinical syndrome and the species substitution.
Neurotoxic effects of star anise in the management of infantile colic: a systematic review of case reports
Pools the published case reports of star anise neurotoxicity given for infantile colic. It confirms that the reported cases cluster in young infants, that seizures and hypertonia dominate the presentation, and that the practice remains common enough for new cases to keep appearing decades after the first warnings.
New cases of star anise poisoning: are we providing enough information?
Reports further Spanish paediatric star anise poisonings long after the original alerts and argues that public and professional warning has been inadequate. Its point is that the hazard is a persistent practice problem, not a historical one.
A Case of Infantile Star Anise Toxicity
A single well-documented infant case of star anise toxicity presenting to emergency care, useful for the clinical picture and its differential from primary seizure disorder.
Anisatin, a potent GABA antagonist, isolated from Illicium anisatum
Establishes the mechanism of the Japanese star anise toxin: anisatin is a potent GABA antagonist. This is why the clinical picture is convulsive rather than sedative, and why it resembles picrotoxin poisoning. The species studied is Illicium anisatum, not the Illicium verum of this record.
On the Toxin of Illicium Anisatum. I. The Isolation and Characterization of a Convulsant Principle: Anisatin
The original isolation and characterisation of anisatin as the convulsant principle of Illicium anisatum. The toxicity of Japanese star anise has therefore been chemically defined for more than seventy years.
Convulsants from Star Anise (Illicium verum HOOK.F.).
Isolates convulsant constituents from Illicium verum itself rather than from the Japanese species, establishing that genuine Chinese star anise is not entirely free of neurotoxic sesquiterpene lactones.
Neurotropic Components from Star Anise(Illicium verum HooK. fil.).
Characterises the veranisatins of Illicium verum and reports convulsion and lethality in mice at low milligram-per-kilogram oral doses, with hypothermia at lower doses. It sets an upper bound on how casually authentic star anise infusions should be dosed.
Illicium verum Hook. f. and Illicium anisatum L.: Anatomical Characters and their Value for Differentiation
Sets out the anatomical features that separate the edible from the toxic species. It is the practical authentication reference, and it also shows why differentiation fails once the fruit is broken or powdered.
Antifungal Activity of the Essential Oil of Illicium verum Fruit and Its Main Component trans-Anethole
Attributes the antifungal activity of star anise fruit oil largely to trans-anethole, tested against a panel of plant pathogenic fungi. Preclinical only, and no inference about systemic antifungal use in humans is warranted.
Anxiolytic-Like Effect of Illicium verum Fruit Oil, trans-Anethole and Related Compounds in Mice
Reports anxiolytic-like behaviour in mice after exposure to star anise fruit oil and to trans-anethole. An animal behavioural finding with no human counterpart.
⚠ Safety & Contraindications
- Pregnancy
- Young children
Contraindications
Its use is prohibited in patients with vigorous fire due to yin deficiency.
Source: Xi S, Gong Y. Essentials of Chinese Materia Medica and Medical Formulas. Academic Press/Elsevier, 2017, pp. 161–167.
Historical Texts
Ben Cao Pin Hui Jing Yao (Collected Essentials of Species of Materia Medica), Liu Wentai and colleagues
Ming dynasty, 1505Ben Cao Gang Mu (Compendium of Materia Medica), Li Shizhen
Ming dynasty, 1596Ben Cao Qiu Zhen (Seeking Accuracy in the Materia Medica), Huang Gongxiu
Qing dynasty, 1769References
- Wang Guo-Wei; Hu Wen-Ting; Huang Bao-Kang; Qin Lu-Ping. Illicium verum: A review on its botany, traditional use, chemistry and pharmacology . Journal of Ethnopharmacology (2011) [DOI]
- Zou Qiyuan; Huang Yuanyuan; Zhang Wenyan; Lu Chen; Yuan Jingquan. A Comprehensive Review of the Pharmacology, Chemistry, Traditional Uses and Quality Control of Star Anise (Illicium verum Hook. F.): An Aromatic Medicinal Plant . Molecules (2023) [DOI]
- Sharafan Marta; Jafernik Karolina; Ekiert Halina; Kubica Paweł; Kocjan Ryszard; Blicharska Eliza; Szopa Agnieszka. Illicium verum (Star Anise) and Trans-Anethole as Valuable Raw Materials for Medicinal and Cosmetic Applications . Molecules (2022) [DOI]
- Khan Tahir Mehmood. Use of star anise tea in swine flue prevention and safety concerns . Complementary Therapies in Clinical Practice (2010) [DOI]
- Aniya; Nomura Yoshihiro; Fuerdeng; Appiah Kwame Sarpong; Fujii Yoshiharu. Evaluation of Allelopathic Activity of Chinese Medicinal Plants and Identification of Shikimic Acid as an Allelochemical from Illicium verum Hook. f. . Plants (2020) [DOI]
- Li Wen; Wu Zhongnan; Xia Yiping; Tan Jinlin; Zhao Haiyue; Chen Si; Li Yaolan; Tang Hongfeng; Wang Guocai; Zhang Yubo. Antiviral and Antioxidant Components from the Fruits of Illicium verum Hook.f. (Chinese Star Anise) . Journal of Agricultural and Food Chemistry (2022) [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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