Aster root

Aster Root (Radix Asteris / Aster tataricus L. f.)

1. Identity: Botanical Classification, Names, and Forms

1.1 Botanical and Pharmacognostic Identity

Radix Asteris (RA) is the dried root and rhizome of Aster tataricus L. f., belonging to the Asteraceae family. The species is also called Tatarian aster and Tatarinow's aster, and is a member of the Aster genus of flowering plants. A. tataricus is a perennial herb of the genus Aster in the Asteraceae (Compositae) family; it is associated with a spicy, bitter, and warm nature and belongs to the Lung Meridian in traditional classification.

Radix Asteris, also known as "Zi Wan," is the dried root and rhizome of Aster tataricus L. f., which has been used to treat cough and asthma in many countries such as China, Japan, Korea, and Vietnam. In the traditional Chinese pharmacopeial system, the drug is formally designated Asteris Radix et Rhizoma, while the Latin binomial Aster tataricus L. f. carries the species epithet "tataricus" (of Tataria), reflecting the plant's Eurasian distribution. The plant was first recorded under the alias "Zi Wan" (茈菀); it is also known by Chinese regional common names such as Huan Hun Cao (还魂草), Qing Wan (青菀), and Shan Ma Lan (山马兰). It is also known as "Fan huncao."

1.2 Botanical Description and Geographic Distribution

RA is a perennial herb with a sloping rhizome; stems, about 40–50 cm high, are erect and stout, with fibrous dead leaf fragments at the base. The perennial typically grows up to 2 meters tall and spreads up to 1.2 meters wide. The plant is distributed across China, Korea, Japan, the northern United States, and eastern Siberia in Russia; it thrives in shady, humid areas at altitudes of 400–2,000 m.

1.3 Plant Part Used and Pharmacopeial Status

The root of Aster tataricus L. f., recorded in all versions of the Chinese Pharmacopoeia, is a traditional Chinese medicine with the function of dispelling phlegm and relieving cough for more than 2,000 years. The roots are excavated in spring and autumn, braided, and dried in the sun, or directly dried after removal of the knotted rhizomes; it is called "Sheng Zi Wan" when directly dried and "Mi Zi Wan" when processed with refined honey. In 1963, RA was included in the Pharmacopoeia of the People's Republic of China.

It is one of the 50 fundamental herbs of traditional Chinese medicine, where it has the name zǐwǎn (Chinese: 紫菀).

1.4 Common Preparations and Dosage Forms

Common preparations include dried root decoctions, honey-processed (stir-fried with honey) slices, hydroethanolic extracts, and powders incorporated into patent medicines. In most cases, RA is used in combination with other TCMs to form prescriptions for the treatment of wind-cold coughs, asthma, consumptive coughs, vomiting, pus formation, and bleeding. The root is taken internally in the treatment of chronic bronchitis and tuberculosis and is often used raw with honey in order to increase the expectorant effect. In Korean and Japanese Kampo medicine, aster root is also used to support respiratory function, sometimes in combination with Platycodon root (Jie Geng) and Licorice (Gan Cao) for a balanced approach to throat and lung care.

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2. Traditional and Historical Use

2.1 Traditional Chinese Medicine: Earliest Records

RA was first recorded in the ancient medical work Shen Nong Ben Cao Jing (Han Dynasty), and subsequently written about in many ancient herbal works, such as the Wu Pu Materia Medica (Wei Jin, 420–589 AD), the Ben Cao Jing Shu (Ming, 1625 AD), and the Ben Cao Feng Yuan (Qing, 1695 AD) for its multiple effects of "warming" the lungs, relieving coughs, eliminating phlegm, and lowering qi. Since the first mention of Aster tataricus in the Shen Nong Ben Cao Jing, its therapeutic effects on cough and asthma have been reported in various medical books. According to Ming Yi Bie Lu, it can be used to treat cough with blood in phlegm. Similar therapeutic effects have been mentioned in Xin Xiu Ben Cao, Qian Jin Yi Fang, Zheng Lei Ben Cao, and Yao Jian.

Aster tataricus L. f. is an extensively used herb in traditional Chinese medicine for more than 2,000 years, known as "Zi wan" or "Fan huncao." In Traditional Chinese Medicine, Aster tataricus (Zi Wan) has been documented for over 1,500 years, appearing in classic texts such as the Shen Nong Ben Cao Jing. It was classified as a warming, moistening herb that enters the Lung channel, used to treat persistent cough, wheezing, and phlegm retention. Unlike strongly drying expectorants, Zi Wan is considered gentle and suitable for long-term use in lung deficiency with chronic cough.

2.2 Elaboration Across Chinese Dynasties

The Xinxiu Materia Medica of the Tang Dynasty integrates the descriptions of the sexual and taste effects of A. tataricus in the Shennong Materia Medica Classic and Supplementary Records of Famous Physicians; A. tataricus is primarily used to treat lung-related diseases. During the Tang and Song Dynasties, the Rihuazi Materia Medica introduced additional therapeutic uses including quenching thirst, moisturizing skin, and replenishing bone marrow. In terms of clinical applications, Qianjin Fang recorded a prescription for treating women with oliguria and hematuria. During the Jin and Yuan Dynasties, A. tataricus was mainly used for chronic coughing, expectoration, coughing up blood, lung weakness, and diabetes in the lung system.

During the Tang and Song Dynasties, the Rihuazi Materia Medica introduced additional therapeutic uses, including quenching thirst, moisturizing skin, and replenishing bone marrow; Qianjin Fang recorded a prescription for treating women with oliguria and hematuria.

2.3 Use in Korea, Japan, and Vietnam

Radix Asteris, also known as "Zi Wan," is the dried root and rhizome of Aster tataricus L. f., which has been used to treat cough and asthma in many countries such as China, Japan, Korea, and Vietnam. AR has been consumed as a traditional medicine in Korea, Japan, and China for the treatment of urologic symptoms. It is one of the most widely used herbal medicines to treat urinary obstruction and urinary incontinence in a dried powered form; AR was usually prescribed as a diuretic when there was a demand for urination but failure, therefore increasing frequency of urination or leaking of urine, or discomfort of the urinary tract during walking accompanied with oliguria.

2.4 Indigenous North American Use

Historically, wild asters have held significance across various cultures, particularly among Indigenous peoples in North America and in traditional Chinese medicine, where they were valued for their diverse medicinal properties. The Iroquois people combined aster with bloodroot and other medicinal plants to make a laxative. The Ojibwa used an infusion of aster root topically to aid with headaches. In North America, Indigenous tribes utilized asters for various medicinal purposes; the Iroquois prepared decoctions of aster roots to treat venereal diseases and as a laxative; the Ojibwa used infusions of aster roots to alleviate headaches.

2.5 Traditional Preparations

Traditional preparations include water decoctions of the dried root and rhizome, often combined with other herbs. Honey processing — stir-frying the dried root in refined honey — is a classical TCM method applied to RA. The root is taken internally in the treatment of chronic bronchitis and tuberculosis and is often used raw with honey in order to increase the expectorant effect. Wild aster has been traditionally used for a range of ailments, with particular emphasis on respiratory issues; the plant's roots, leaves, and flowers were employed to address conditions such as coughs, colds, and bronchitis. Traditional uses also encompass skin conditions and anti-inflammatory purposes; wild aster was applied topically for skin irritations, rashes, and wounds, and was sometimes used in poultices for bruises, boils, burns, and to address skin issues caused by contact with plants like poison ivy.

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3. Key Constituents and Active Compounds

3.1 Overview of Chemical Composition

A total of 186 compounds have been isolated and identified from Aster tataricus, including terpenes, organic acids, peptides, and flavonoids. To date, 135 compounds have been isolated from RA from an earlier review, mainly including terpenes, organic acids, peptides, flavonoids, and other compounds. The more recent 2024 review substantially expanded that number, reflecting ongoing phytochemical investigation.

3.2 Terpenoids

Terpenoids are the most abundant class of compounds in RA, including triterpenoids, mono-glycosides, and triterpenoid saponins, with a total of 50 identified from its different parts — 41 from the underground parts (roots and rhizomes). Triterpenoid saponins are one of the important active ingredients and the main ingredient with an expectorant effect. Shionone, as a specific triterpene, has been used as a marker compound for quality control of RA in the Chinese Pharmacopoeia.

Shionone is a tetracyclic triterpenoid that has an oxo group, a 4-methyl-3-pentenyl sidechain, and six methyl groups; it is the primary constituent of Radix Asteris. The content of shionone in the dried roots and rhizome of A. tataricus is reported to be between 0.026 and 0.41%. In the 2020 edition of the Chinese Pharmacopoeia, shionone is measured by high-performance liquid chromatography (HPLC) as a marker to control the quality of RA, with a minimum total proportion of 0.15% in the "Sheng Zi Wan," and no less than 0.10% in the "Mi Zi Wan."

Other identified terpenoids include epifriedelinol, friedelin, astersaponins (A through G), asterprosaponins, hederasaponins (shionosides), beta-amyrin, beta-sitosterol, spinasterol, stigmasterol, and shionone-related compounds. A number of compounds isolated from the medicinal plant Aster tataricus include shionone, epifriedelinol, quercetin, kaempferol, scopoletin, emodin, aurantiamide acetate, and 1,7-dihydroxy-6-methyl-anthraquinone. The plant contains the triterpene epifriedelinol, which has shown anticancer activity and is used as a folk cure for cancer.

3.3 Organic Acids and Phenolics

Organic acids are an important class of compounds in RA and play an important role in anti-stress, anti-thrombosis, and anti-inflammatory treatments; up to now, a total of 19 organic acids, mainly aromatic organic acids, have been identified. Identified phenolic acids include chlorogenic acid, caffeic acid, ferulic acid, protocatechuic acid, and methyl caffeate. Wild asters contain saponins, which may contribute to the plant's traditional use as an expectorant by thinning mucus secretions; research also identifies phenolic acids, such as chlorogenic acid, which possess anti-inflammatory properties that could explain the historical application of aster poultices for skin inflammation.

3.4 Flavonoids

Pharmacokinetic profiling has identified compounds including quercetin, isorhamnetin, isoquercitrin, luteolin, kaempferol, and kaempferol-7-O-β-D-glucopyranoside in both raw and honey-processed Aster tataricus. Quercetin and kaempferol were most potent in inhibiting hemolysis, lipid peroxidation, and superoxide radical generation. Scopoletin and emodin were similar to quercetin and kaempferol in inhibiting superoxide radical generation and second to them in inhibiting lipid peroxidation.

3.5 Cyclopeptides (Astins)

The plant Aster tataricus contains unique active ingredients named astins, which are macrocyclic peptides showing promising antitumor activities and usually containing the highly unusual moiety 3,4-dichloroproline. Several studies identified astins — macrocyclic peptides that possess anticancer and immunosuppressive activities — from the roots of A. tataricus. Astins are now known to bind to STING, a crucial cytosolic DNA sensor protein involved in human innate immunity. A total of 24 astin chemical variants are known, including the structurally related branched tataricins as well as linear asterinins; quantitatively, astin variants A to C dominate in A. tataricus preparations.

Notably, research published in PNAS (2019) demonstrated that key astin variants are produced during symbiosis with the aster plant, originating from the fungal endophyte Cyanodermella asteris living within the plant, rather than being produced by the plant itself. This has important implications for the standardization and biotechnological production of astin-type compounds.

3.6 Polysaccharides and Peptides

A homogeneous polysaccharide (ATP-II), with a molecular weight of 3.4 × 10⁴ Da, was purified from Aster tataricus and found to be composed of glucose, galactose, mannose, rhamnose, and arabinose in defined molar ratios. This polysaccharide fraction has been studied for anticancer properties.

3.7 Coumarin Derivatives

Among the compounds identified by UHPLC-MS analysis are scopoletin and 7-hydroxycoumarin (umbelliferone), contributing to the plant's coumarin profile. The active phytochemicals include peptides, flavonoids, phenols, and coumarins; these phytochemicals possess different biological activities such as anticancer, anti-inflammatory, anti-asthma, and antidiabetic.

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4. Mechanisms of Action

4.1 Expectorant and Antitussive Mechanisms

Traditional medicine practitioners believed that the expectorant and antitussive role of A. tataricus is ascribed to the tropism of taste; different from traditional medicine, modern medical practitioners believe that A. tataricus plays a role by reducing inflammatory factors and relaxing bronchial smooth muscle. Triterpenoid saponins are the main ingredient with an expectorant effect. Shionone is considered to be an active ingredient in RA extract for its expectorant and antitussive activities in mouse models.

4.2 Anti-inflammatory Mechanisms

Shionone is a triterpenoid that is the primary constituent of Radix Asteris. It has emerged as an attractive candidate against different important diseases, including interstitial cystitis, colitis, cancer, Parkinson's disease, and urinary tract infections, and was found to have a protective effect on multiple organs, including the colon, kidneys, lungs, brain, and bladder. The anti-inflammation activity of shionone may be considered an important property that imparts the positive health outcomes. The Chinese Pharmacopoeia has designated shionone as a quality marker due to its role as a core anti-inflammatory component in A. tataricus, and the underlying mechanism has been extensively elucidated.

4.3 Antitumor Mechanisms

The polysaccharide ATP-II was evaluated for anticancer efficacy and associated mechanisms on glioma C6 cells in vitro and in vivo; treatment with ATP-II inhibited cell proliferation, and this biological response came from induction of DNA damage and consequent induction of apoptosis. Oral ATP-II administration resulted in regression of glioma tumors and induced apoptosis of transplanted tumor tissues by increasing the ratio of Bax/Bcl-2 and activation of caspase-3. Astins, the cyclic peptide constituents, exert antitumor effects partly through binding to STING and modulating innate immune signaling.

4.4 Antiviral Mechanisms

ATE induced an antiviral state, including upregulation of type-I interferon signaling and secretion of IFNs and pro-inflammatory cytokines in RAW264.7 cells. In vivo, ATE treatment showed increased survival due to reduced viral titers and less severe pathological changes in the lung; the observed prophylactic effects were associated with increased secretion of IL-6, IFN-γ, and IFN-β in bronchoalveolar lavage fluid. Quercetin, kaempferol, and ferulic acid were identified as active compounds in the aqueous fraction.

4.5 Laxative/Gut Motility Mechanisms

It can be speculated that the ethanol extract of Aster tataricus (ATE) may attenuate constipation mainly through antagonizing the binding of acetylcholine to muscarinic receptor, inhibiting Ca²⁺ influx, and anti-inflammation.

4.6 Bone Metabolism Mechanisms

Administering aster shionoside A2 significantly reduced the phosphorylation levels of ERK1/2, JNK, and p38 proteins, inhibited osteoclast-related gene activation in reaction to RANKL, and impeded the transcription and translation of NFATC1 and c-fos throughout the osteoclast differentiation phase. The ethanol extract of Radix Asteris (EERA) retards osteoclast differentiation by inhibiting receptor activator of nuclear factor kappa-B ligand (RANKL) expression and obstructing RANKL-induced osteoclastogenesis; EERA markedly suppressed RANKL-induced expression of NFATc1, a pivotal osteoclastogenic factor, via modulating early RANK signaling.

4.7 Antibacterial Activity

The plant has an antibacterial action, inhibiting the growth of Staphylococcus aureus, E. coli, Shigella dysenteriae, B. typhi, Pseudomonas, and Vibrio proteus.

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5. Scientific Evidence by Area of Use

Important overarching note: The large majority of published pharmacological research on RA consists of in vitro (cell culture) and in vivo (animal model) studies. Only a few studies have been performed to report the pharmacological activities; however, the detailed mechanism of action and its clinical significance are yet to be studied. As of the available literature, there is a critical absence of large-scale, randomized controlled clinical trials (RCTs) in humans for RA as an isolated supplement. The following evidence characterizations reflect this limitation.

5.1 Respiratory System: Cough, Asthma, and Bronchitis

Evidence level: Preclinical (animal/in vitro); long traditional use; no large human RCTs identified for the isolated root.

The root of Aster tataricus L. f., recorded in all versions of the Chinese Pharmacopoeia, is a traditional Chinese medicine with the function of dispelling phlegm and relieving cough for more than 2,000 years. A study was designed to evaluate the expectorant, antitussive, and anti-inflammatory activities of the root. The 70% ethanol extract (RA-70) was divided into three fractions; all were orally administered to mice to investigate potential expectorant activities by a tracheal phenol red secretion method. The most effective fraction, together with shionone, was evaluated for expectorant, antitussive, and anti-inflammatory activities by the mouse models of phenol red secretion, ammonia-induced cough, and xylene-induced ear swelling. This is a preclinical animal study; findings support the traditional use but do not constitute clinical proof of efficacy in humans.

Besides the effects of expectorant and antitussive, RA possesses activities such as antitumor, antibacterial, diuretic, antiviral, antioxidant, and antiulcer. Thanks to its favorable curative effect for cough, RA is widely used in many Chinese patent medicines and clinical prescriptions. RA is incorporated into numerous approved TCM patent formulas in China, representing indirect evidence of widespread clinical application, though this does not substitute for placebo-controlled trials.

5.2 Antitumor and Anticancer Activity

Evidence level: Preclinical only (cell lines and animal models); no human clinical trials identified.

A study evaluated the anticancer activity of Aster tataricus (AT) on SCC-9 human oral squamous carcinoma; an ethanol extract was prepared and used at concentrations of 10, 20, 40, 80, 160, 320, and 640 µg/mL. Effects on SCC9 cells were observed by microscope, cytotoxicity by MTT assay, and clonogenic assay was used for the estimation of effect on colony forming ability of SCC9 cells. The result suggested that treatment with AT extract causes cytotoxicity to SCC9 cancerous cells and significantly inhibits the proliferation of cells (p<0.001). This is an in vitro cell-line study and results cannot be directly extrapolated to human clinical outcomes.

Extensive biological testing has demonstrated that A. tataricus exhibits anti-tumor properties, among other pharmacological activities. Polysaccharide ATP-II demonstrated anti-proliferative effects in glioma cell lines and a xenograft model; astin cyclic peptides exhibit STING-binding antitumor properties in preclinical systems. All tumor-related evidence remains in the preclinical domain.

5.3 Anti-inflammatory Activity

Evidence level: Preclinical (in vitro and animal models).

Shionone has emerged as an attractive candidate against different important diseases, including interstitial cystitis, colitis, cancer, Parkinson's disease, and urinary tract infections, and was found to have a protective effect on multiple organs. RAS has been used for the treatment of cough and phlegm since early times; recent studies showed several other important pharmacological properties such as anti-inflammatory, antioxidant, antitumor, and anti-depression effects. These findings are from preclinical research models.

5.4 Antiviral Activity

Evidence level: Preclinical (in vitro and rodent models); no human clinical data.

ATE was shown to have antiviral effects in both in vitro and in vivo models; antiviral effect was assessed against Influenza A virus (PR8), Newcastle Disease Virus (NDV), and Herpes Simplex Virus-1 (HSV) in RAW264.7 cells; mechanism was explored by analyzing the induction of antiviral immune responses, including type-I interferon (IFN) signaling and cytokine secretion. Terpenoids in A. tataricus have certain antiviral activity, especially against HBV; studies found that astataricusones B exerts potent antiviral effects through dual mechanisms: primarily by suppressing the secretion of hepatitis B virus surface antigens (HBsAg and HBeAg) and subsequently inhibiting viral DNA replication. The antiviral properties of A. tataricus warrant additional validation.

5.5 Antidepressant Activity

Evidence level: Preliminary preclinical only.

RA extracts have various pharmacological activities including anti-depression. Screening of RA constituents by UHPLC-Q-TOF-MS identified compounds with potential antidepressant activity in behavioral animal models, but no human studies have been conducted. This area remains highly preliminary and exploratory.

5.6 Gastrointestinal Effects (Constipation)

Evidence level: Preclinical (animal and in vitro models).

The dried root and rhizome of Aster tataricus is a traditional Chinese medicine with the function of antitussive, expectorant, and antiasthmatic; ancient books and modern pharmacological research demonstrated that RA may have the function of moistening intestines and relieving constipation, but there was a lack of systematic evidence. A comprehensive evaluation of the ethanol extract of Aster tataricus (ATE) in treating constipation was conducted from in vivo to in vitro; it was speculated that ATE may attenuate constipation mainly through antagonizing the binding of acetylcholine to muscarinic receptor, inhibiting Ca²⁺ influx, and anti-inflammation. No human clinical trials have been reported for this indication.

5.7 Bone Health: Osteoporosis and Osteoclast Activity

Evidence level: Preclinical (cell culture and animal models).

Lee et al. found that ethanolic extracts of Aster tataricus regulated osteoclast differentiation and alleviated osteoporosis as well as related metabolic changes after estrogen depletion; these results indicate that Aster tataricus can be used as an alternative treatment strategy for postmenopausal osteoporosis accompanied by metabolic imbalance. This evidence is from an animal (ovariectomized mouse) model and has not been validated in human clinical trials.

5.8 Benign Prostatic Hyperplasia (BPH)

Evidence level: Preclinical (animal model).

Asteris Radix et Rhizoma refers to the roots and rhizomes of Aster tataricus L., which is widely distributed throughout East Asia; AR has been consumed as a traditional medicine in Korea, Japan, and China for the treatment of urologic symptoms. The present study evaluated the therapeutic effects of AR on testosterone-induced BPH in rats; BPH was induced by subcutaneous injections of testosterone propionate daily for four weeks, and rats were also administered daily oral gavage of AR (150 mg/kg) or vehicle. Aster tataricus alleviated testosterone-induced benign prostatic hyperplasia in rats by promoting apoptosis and inhibiting inflammation; these results indicate that Aster tataricus can be used to treat inflammation associated with benign prostatic hyperplasia in clinical settings. These conclusions are drawn from a rat model; human clinical evidence is absent.

5.9 Gut Microbiota Modulation

Evidence level: Preclinical (in vitro microbiological).

In vitro, ATE exerted a growth-promoting effect on Bifidobacterium and an inhibitory effect on Clostridium perfringens; therefore, A. tataricus can have a probiotic effect on intestinal flora. This is an in vitro finding and has not been demonstrated in clinical populations.

5.10 Antioxidant Activity

Evidence level: Preclinical (in vitro).

Studies have demonstrated significant antioxidant and antimicrobial activity in laboratory settings, supporting their potential use in promoting skin and respiratory health. Aster tataricus has anti-oxidative, anti-inflammatory, anti-depressive, and anti-tumor effects. Antioxidant activity has been attributed primarily to quercetin, kaempferol, scopoletin, and related polyphenols, in in vitro assays.

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6. Body Systems and Health Areas

• Respiratory system: Aster root is a traditional Chinese medicinal herb used to moisten the lungs to resolve phlegm and ease cough. Its expectorant, antitussive, and bronchial smooth muscle-relaxing properties are the most historically and pharmacologically supported associations.
• Immune system: ATE induced an antiviral state, including upregulation of type-I interferon signaling and secretion of IFNs and pro-inflammatory cytokines.
• Gastrointestinal system: Beyond respiratory complaints, traditional applications extended to digestive health; wild aster was used to alleviate digestive discomfort including indigestion, stomachaches, and bloating; the plant was also used as a laxative, sometimes combined with other herbs.
• Musculoskeletal / bone: Preclinical evidence implicates RA in inhibiting osteoclastogenesis and protecting against bone loss in estrogen-deficient animal models.
• Urogenital system: AR is one of the most widely used herbal medicines to treat urinary obstruction and urinary incontinence in a dried powdered form; AR was usually prescribed as a diuretic when there was a demand for urination but failure.
• Nervous system / mood: Preliminary preclinical investigation of antidepressant activity via compound screening; no clinical studies available.
• Oncology (preclinical): Cytotoxic and pro-apoptotic activities observed in multiple cancer cell lines and rodent tumor models, attributed to astins, polysaccharides, and epifriedelinol.
• Skin (topical/traditional): Historically, wild aster was applied topically for skin irritations, rashes, and wounds; it was sometimes used in poultices for bruises, boils, burns, and to address skin issues.

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7. Dosage Forms and Reported Dosages

The following dosages are reported in the cited sources only. No independent dosage recommendation is made here.

• Chinese Pharmacopoeia quality control standards: In the 2020 edition of the Chinese Pharmacopoeia, shionone is measured by HPLC as a quality marker, with a minimum total proportion of 0.15% in "Sheng Zi Wan," and no less than 0.10% in "Mi Zi Wan."
• Animal model (BPH study, oral gavage): BPH was induced in rats by subcutaneous injections of testosterone propionate daily for four weeks; rats were also administered daily oral gavage of AR at 150 mg/kg.
• Animal model (anticancer in vitro, SCC-9 cells): AT extract was used at different concentrations of 10, 20, 40, 80, 160, 320, and 640 µg/mL for the evaluation of anticancer activity.
• Animal model (shionone safety, in vivo): In different animal studies, up to a 200 mg/kg treatment dose has been used on rats.
• Expectorant/antitussive research extract: The 70% ethanol extract of the root of A. tataricus was divided into three fractions and all were orally administered to mice.
• Subchronic toxicity study dosage: A subchronic toxicity evaluation employing a 350 mg/kg/day dose over 91 days in rats revealed hepatic lesions and elevated serum ALT and AST levels in the petroleum ether fraction but not the 75% ethanol extract itself, suggesting the toxic elements are concentrated in the petroleum ether fraction.

No standardized human clinical dosage for RA as a dietary supplement has been established in the peer-reviewed literature surveyed. TCM clinical dosages are determined by trained practitioners and vary by formula and condition.

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8. Safety Considerations and Interactions

8.1 Hepatotoxicity: The Astin Concern

Cyclopeptides (astins) exhibit "double-edged sword" properties, demonstrating significant anticancer effects; however, they share structural similarities with cyclochloroside, a hepatotoxic metabolite of penicillin, which can cause liver damage. Toxicological studies have explored the mechanisms of liver damage associated with astin. To ensure clinical safety, more comprehensive and reliable data are required to clarify potential toxicity and develop more effective detoxification methods.

Some compounds, notably astin B and C, have been considered hepatotoxic agents from Radix Asteris. A subchronic toxicity evaluation employing a 350 mg/kg/day dose over 91 days in rats revealed hepatic lesions and elevated serum ALT and AST levels in the petroleum ether fraction but not the 75% ethanol extract itself, suggesting the toxic elements are concentrated in the petroleum ether fraction.

The study showed that Aster tataricus could produce toxic effects, mainly on the liver; much less on the heart. In addition, Aster tataricus has also been reported to have damaging effects on the liver, as well as other toxicities discussed in recent reviews.

8.2 Insufficient Toxicological Data

There are few studies on the toxicity and the consistency of components of RA, which indicates the need for further in-depth studies on the toxicity and quality control of RA and its extracts. Modern pharmacological studies have primarily focused on the therapeutic effects of Aster tataricus against cough, tumors, and other diseases; however, studies investigating its toxic effects are limited. Although its rich chemical constituents have various pharmacological activities, the underlying mechanisms, as well as its toxicity and safety, remain unclear and warrant further investigation.

8.3 Herb Combination Effects

The combined decoction of RA and coltsfoot can significantly reduce its toxicity, which is also one of the important reasons for the compatibility of TCM. This suggests that observed toxic signals from isolated RA may be mitigated in traditional multi-herb decoctions, though this interaction has not been rigorously characterized in human studies.

8.4 Honey Processing and Reduced Toxicity

Honey processing (Mi Zi Wan) has been practiced in TCM to modify the chemical profile of RA. In the 2020 edition of the Chinese Pharmacopoeia, shionone is measured by HPLC as a quality marker, with a minimum total proportion of 0.15% in the "Sheng Zi Wan," and no less than 0.10% in the "Mi Zi Wan," indicating that honey processing measurably alters constituent levels. The pharmacokinetic differences between raw and honey-processed RA have been characterized by UHPLC-MS/MS methods.

8.5 Asteraceae Family Allergy Cross-Reactivity

As a member of the Asteraceae (Compositae) family, individuals with known hypersensitivity to related plants (such as ragweed, chrysanthemum, marigold, daisy, or chamomile) may have cross-reactive sensitivity to RA, consistent with well-documented Asteraceae allergy patterns. This is a class-level pharmacognostic safety consideration, not a species-specific clinical finding from RA studies.

8.6 Pregnancy Caution (Traditional)

Traditional TCM sources caution against use during pregnancy and nursing, a precaution that appears in classical references and contemporary TCM practice guidelines, although no controlled human safety data exist.

8.7 Quality Control and Adulteration Risk

Many measurement methods, such as thin layer chromatography, high performance liquid chromatography (HPLC), and ultra-high performance liquid chromatography (UHPLC), have been used to evaluate the quality of RA and its related products. Shionone content varies significantly between batches and between raw and processed forms, underscoring the importance of standardized quality control for any supplement product. The significant variability in constituent content across preparations is a practical safety and efficacy consideration.

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References

• Li KJ, et al. "Radix Asteris: Traditional Usage, Phytochemistry and Pharmacology of An Important Traditional Chinese Medicine." Molecules 2022;27(17):5388. PMC9458035.
• Comprehensive review: "An updated and comprehensive review of the morphology, ethnomedicinal uses, phytochemistry, and pharmacological activity of Aster tataricus L. f." PMC11334675.
• Zhang X, et al. "Aster tataricus L. f.: a review on the botany, phytochemistry, ethnopharmacology, pharmacology, toxicology and comprehensive utilization." Frontiers in Pharmacology 2025. PMC12014666.
• Review: "Pharmacological Properties of Shionone: Potential Anti-Inflammatory Phytochemical against Different Diseases." PMC10780092.
• Gamage N, et al. "Aster tataricus extract and its active compounds display a broad spectrum of antiviral activity in vitro and in vivo." Chinese Medicine 2025;20(1):113. PMC12265312.
• Expectorant, antitussive, anti-inflammatory activities and compositional analysis of Aster tataricus. Journal of Ethnopharmacology 2015.
• Anti-cancer activity of Aster tataricus on SCC-9 human oral squamous carcinoma. PubMed PMID 28573230.
• Aster tataricus alleviates constipation by antagonizing the binding of acetylcholine to muscarinic receptor and inhibiting Ca2+ influx. PubMed PMID 33378996.
• Asteris Radix et Rhizoma suppresses testosterone-induced benign prostatic hyperplasia in rats by regulating apoptosis and inflammation. PubMed PMID 32209388.
• Schafhauser T, et al. "Antitumor astins originate from the fungal endophyte Cyanodermella asteris living within the medicinal plant Aster tataricus." PNAS 2019;116(52):26909.
• Aster tataricus — Wikipedia, citing Royal Botanic Gardens, Plants of the World Online.