Teasel (Dipsacus spp.): A Comprehensive Reference
1. Identity: Botanical Names, Sources, and Forms
Taxonomy and Nomenclature
The genus name Dipsacus is derived from the Greek word for thirst (dipsa) and refers to the cup-like formation made where sessile leaves merge at the stem. The name "teasel" derives from Old English tǣsl, tǣsel, relating to the verb "to tease" — the dried heads of the plant were once used in the textile industry to raise the nap on woolen cloth. The genus Dipsacus encompasses multiple medicinal species, and the literature distinguishes between them depending on the tradition of use:
- Dipsacus fullonum L. (wild teasel, common teasel, Fuller's teasel) — the primary European species, also written historically as D. sylvestris, a name sometimes used interchangeably in older literature.
- Dipsacus asper Wall. ex C.B. Clarke (also referred to as D. asperoides C.Y. Cheng & T.M. Ai) — the principal species in Traditional Chinese Medicine (TCM), known as Xu Duan or Radix Dipsaci.
- Dipsacus japonicus Miq. — Japanese teasel, sometimes cited alongside D. asper in East Asian pharmacopeias.
- Dipsacus inermis Wall. — Himalayan teasel, the subject of more recent antimicrobial research.
Dipsacus asper Wall. ex C.B. Clarke (DA), also named Xu-Duan in Chinese, is a species in the genus Dipsacus (family Caprifoliaceae).
The genera Dipsacus L. and Scabiosa L. of the Caprifoliaceae family are widely distributed in Europe, Asia, and Africa.
The genus Dipsacus has been used for centuries in Chinese and Korean folk medicines to treat bone and joint problems. The Korean Herbal Pharmacopoeia and Chinese Pharmacopoeia include Dipsaci radix, the dried roots of D. asperoides C.Y. Cheng & T.M. Ai.
Botanical Description
Teasel is a biennial plant belonging to the Dipsacaceae family (now placed within Caprifoliaceae), native to Europe, North Africa, and some parts of Asia. It is characterized by its tall stature, reaching up to two meters in height, and its prickly stem and leaves. The leaves are oppositely arranged along the stem, conjoining at the base to form a cup-like structure that often collects water. Its most notable feature is the egg-shaped head with spiny bracts that bloom into small lavender to white flowers in its second year.
Parts Used and Common Preparations
Teasel roots are used medicinally. The roots are dug up in the summer (usually July and August) and cleaned, with the fibrous material and dirt removed. The roots are then cut into slices and dried in the sun before being used in herbal preparations. There are three processing methods for DA, including diaphoretic processing, wine-processing, and salt-processing.
Common forms and preparations include:
- Decoctions and infusions: traditional preparation of dried root in water.
- Tinctures: hydroalcoholic extracts of the root, widely used in Western herbalism.
- Standardized dry extracts: used in research and some commercial supplements, standardized to asperosaponin VI content.
- Topical preparations: compresses and salves from root preparations for skin and joint use.
Teasel root can be prepared as an extract, decoction, or in topical applications. In the form of compresses, it has proven itself on cracked skin.
2. Traditional and Historical Use
European Folk and Classical Traditions
Teasel has a long history in European herbal practice reaching back to classical antiquity. According to the famed practitioner of herbal medicine in ancient Greece, Dioscorides, the root of teasel possessed purifying attributes and suggested the use of a decoction prepared by simmering the roots of teasel in wine for treating warts as well as fistulas effectively. In addition to Dioscorides, several other herbalists of the ancient times also advocated the use of the roots of this herb to treat jaundice and also in the form of a diuretic to augment the flow of urine.
Historically, European herbalists used root preparations to treat various skin conditions, including warts and ulcers, and as a diuretic and stomachic. It was also used to clear liver obstructions and treat jaundice. Teasel root infusions have traditionally been used to strengthen the stomach and as a remedy for jaundice. It has also been used as a mild stimulant, similar to caffeine, to alleviate lethargy.
Teasel (Dipsacus fullonum L.) is an old traditional herbal medicine with a wide range of indications. In folk medicine, it is used mainly for rheumatism and gastric and duodenal ulcers. The 17th-century English herbalist Nicholas Culpeper described both wild and Fuller's teasel as sharing the same medicinal uses, with the root being the principal part used and possessing a cleansing ability. In the past, people believed that the rainwater collected in the bowl-like depression of teasel leaves was helpful in providing relief from irritation and swelling in the eyes and was also frequently used as a cosmetic to make the complexion of the face fairer.
In European folk medicine, wild teasel was regarded as a bitter digestive tonic and remedy for skin diseases, jaundice, and kidney complaints. The root was also historically used as a diuretic and stimulant for liver and gallbladder function.
Since Roman times, Fuller's teasel (the cultivar group Dipsacus fullonum Sativus Group; syn. D. sativus) was widely used in textile processing, as it provides a natural comb for cleaning, aligning and raising the nap on fabrics, particularly wool (i.e., "fulling").
In homeopathy, teasel is used in the treatment of dermatitis, tuberculosis, and anal fistulas. This reflects a secondary, non-mainstream tradition of use that is separate from conventional folk herbalism and carries no verified clinical evidence.
Traditional Chinese Medicine (TCM)
In Traditional Chinese Medicine, Dipsacus asper root has been used for over a thousand years. The name xu duan means "restore what is broken," reflecting its role in formulas aimed at mending fractures, healing tendons, and restoring musculoskeletal integrity. It was also used for chronic weakness, bleeding during pregnancy, and uterine instability.
In traditional Chinese medicine, teasel root is affiliated with the Liver and Kidney meridians, and has bitter, pungent and warm properties. The roots of D. asper have been used in Traditional Chinese Medicine for hundreds of years as an anti-osteoporosis, tonic and anti-aging agent for the therapy of low back pain, traumatic hematoma, threatened abortion, and bone fractures.
Teasel root is a traditional Chinese herb used to strengthen the bones, tendons, and ligaments and help relieve symptoms of chronic lower back pain and knee and joint stiffness. The herb is said to increase blood flow to these areas and also help remove soreness and speed healing after an injury. Teasel root also is used traditionally to stop excessive uterine bleeding during or between menstrual flows, to calm a restless fetus, and stop bleeding during pregnancy.
Korean and Other Asian Traditions
The genus Dipsacus has been used for centuries in Chinese and Korean folk medicines to treat bone (osteoporosis) and joint problems (rheumatic arthritis). The Korean Herbal Pharmacopoeia and Chinese Pharmacopoeia include Dipsaci radix, the dried roots of D. asperoides. Japanese teasel root, Dipsacus asperi seu japonicus, has enjoyed a long history of use throughout Asia.
Modern Western Herbalism
Teasel's more recent revival in Western herbalism is largely due to its use in Lyme disease protocols, particularly popularized by German herbalist Wolf-Dieter Storl. This use is discussed in detail in the scientific evidence section below; it remains largely anecdote-based without robust clinical support.
3. Key Chemical Constituents and Mechanisms of Action
Overall Phytochemical Profile
More than 100 compounds have been isolated and identified from Dipsacus asper Wall. ex C.B. Clarke, a substantial proportion of which were reported to be triterpenoids and iridoids. Until now, about one hundred components have been isolated from DA, which contains triterpenoids, iridoids, phenolic acids, essential oils, alkaloids, lignin, and fatty acids.
Triterpenoid Saponins
Asperosaponin VI (ASA VI) is an oleanane-type triterpenoid saponin and the principal bioactive constituent of Dipsacus asper Wall., as documented in the Chinese Pharmacopoeia (2020). ASA VI has been reported to exhibit a wide range of pharmacological activities, including neuroprotective, anti-inflammatory, osteogenic, hepatoprotective, and metabolic regulatory effects.
In previous studies, dozens of chemical constituents, including triterpene saponins, iridoids, phenolics, and alkaloids have been identified from the roots of D. asper. Pharmacological studies so far have demonstrated that saponins isolated from the roots of this plant possess anticomplementary, antinociceptive, cytotoxic, osteoprotective, cardioprotective, and inhibition of Alzheimer's disease activities, while phenolics possess neuroprotective and antioxidant effects.
Due to the chemical dipsacus saponin C, Dipsacus asper has medically significant procoagulant properties, that is likely due to an increase of intracellular calcium, and apoptosis of mitochondria.
Iridoid Glycosides
Bioassay-guided fractionation of 95% EtOH extract from the roots of Dipsacus asper led to the isolation of some phenolic acids (caffeic acid, 2,6-dihydroxycinnamic acid, vanillic acid, 2′-O-caffeoyl-D-glucopyranoside ester, and caffeoylquinic acid) as the major active components, and five new iridoid glucoside dimers and one new iridoid glucoside monomer, as well as other known iridoid glycosides loganin, cantleyoside, triplostoside A, lisianthioside, and 6′-O-beta-D-apiofuranosyl sweroside, as well as triterpenoids oleanic acid and akebiasaponin D.
The skeleton of iridoids is not very stable. The bis-iridoids isolated from Dipsacus species, including D. ferox, D. laciniatus, D. japonicus, D. sylvestris, and D. asperoides, were found to possess a secoiridoid/iridoid subtype skeleton consisting of secologanic acid condensed to the 7-OH of loganin or loganin-like iridoids.
Phenolic Acids and Flavonoids
These plants are rich sources of many valuable specialized metabolites with beneficial medicinal properties, such as triterpenoid derivatives, iridoids, phenolic acids, and flavonoids. The leaves of D. fullonum in particular have been shown to contain polyphenols. The two major polyphenols identified in wild teasel leaves were saponarin and chlorogenic acid; the main iridoids were sylvestrosides III and IV, loganic acid, and loganin.
Established and Investigated Mechanisms
Bone and Cartilage Effects
Akebia saponin D reduced mRNA expression of osteoclastogenesis markers such as TRAP, CtsK, MMP-9, and β3-integrin. In addition, akebia saponin D also inhibited phosphorylation of Akt, p38, and JNK and mRNA and protein levels of osteoclastogenesis markers in RANKL-induced osteoclastogenesis bone marrow-derived monocytes. Dipsacus saponins also inhibited chondrocyte apoptosis in a rat model of osteoarthritis in a dose-dependent pattern by decreasing expression of Bax, caspase-3, and caspase-9 and by increasing expression of Bcl-2.
Anti-Inflammatory Pathways
Cantleyoside, an iridoid identified in D. asper roots, inhibited proliferation of human rheumatoid arthritis fibroblast synovial cells (HFLS-RA) and induced cell apoptosis through AMPK/Sirt1/NF-κB pathway activation. Moreover, the protective effect of sweroside was observed in IL-1β-induced inflammation in rat articular chondrocytes.
Neuroprotective Mechanisms
Phenolics and saponins isolated from the roots of D. asper all possess neuroprotective effects; iridoids and lignans were examined for their neuroprotective effects against Aβ25-35 induced cytotoxicity in PC12 cells. The result showed that these compounds had moderate protective effects against Aβ25-35 induced cell death.
Asperosaponin VI (ASD) possesses a plethora of pharmacological properties, with a marked emphasis on its anti-inflammatory activity in the aftermath of acute injury. Prior research has reported that ASD demonstrates the ability to traverse the blood-brain barrier and exert neuroprotective effects in inflammation-associated neurodegenerative disorders.
Cholinesterase Inhibition
Oleanane triterpenoid saponins isolated from the roots of D. asper were found to inhibit acetylcholinesterase. Other terpenoid compounds isolated from Dipsaci radix, such as dipsacus saponin IV, dipsacus saponin XI, and dipsacus saponin X, displayed strong AChE inhibitory activity, while cauloside A, dipsacus saponin C, and dipsacus saponin XI were more effective against butyrylcholinesterase. These activities were higher than that of the positive control, berberine.
Angiogenesis and Wound Healing
Asperosaponin VI (ASA VI), which is a triterpene saponin and pharmacologically active constituent derived from Dipsacus asper Wall, has various bioactive effects, including neuroprotection, osteoporosis prevention, myocardial protection, anti-apoptosis, and analgesia.
4. Scientific Evidence by Area of Use
The overwhelming majority of published research on teasel species consists of in vitro cell studies and animal model experiments. As of the available literature, no large-scale, randomized controlled clinical trials in humans have been published for any therapeutic indication of teasel root. The evidence base is preliminary and preclinical. Each area below is characterized with this important caveat.
4.1 Bone Health: Osteoporosis and Fracture Healing
Traditional basis: The herb is mainly used for the treatment of bone diseases (e.g., bone fracture, osteoporosis, rheumatic arthritis) and traumatic hematoma.
Preclinical evidence: Modern pharmacological studies revealed that DA exhibited the effects of fracture healing, anti-osteoporosis, neuroprotective, anti-uterine contraction, anti-aging, hepatoprotective, anti-myocardial infarction, anti-inflammatory, and anti-arthritis. These effects have been demonstrated primarily in animal models and in vitro systems.
The anti-osteoporosis mechanisms operate through several pathways. The saponin akebia saponin D reduced mRNA expression of osteoclastogenesis markers such as TRAP, CtsK, MMP-9, and β3-integrin, and also inhibited phosphorylation of Akt, p38, and JNK in RANKL-induced osteoclastogenesis bone marrow-derived monocytes. Asperosaponin VI inhibition of DNMT alleviates GPX4 suppression-mediated osteoblast ferroptosis and diabetic osteoporosis (this is a preclinical finding published in 2024).
Evidence strength: Preclinical (in vitro and animal) only. No human clinical trials on bone density or fracture healing with teasel extracts have been published.
4.2 Arthritis and Anti-Inflammatory Effects
The aqueous extract of D. asperoides roots at a concentration of 50 mg/kg and 100 mg/kg, administered orally once a day for 21 days, displayed antiarthritic effects in collagen-induced rheumatoid arthritis in male DBA/1 mice by enhancement of the ankle joint architecture and suppression of arthritis score (synovitis, pannus, and bone erosion scores) and serum levels of anti-CII IgG2a antibody and the inflammatory mediators (TNF-α, IL-1β, and IL-6). These effects were comparable or stronger to those after treatment with 1 mg/kg of the anti-rheumatoid drug indomethacin.
In the area of osteoarthritis, more recent research has explored asperosaponin VI's role in chondrocyte protection. Asperosaponin VI (AVI) is a naturally occurring monosaccharide derived from Dipsacus asperoides renowned for its anti-inflammatory and bone-protective properties, and investigation has aimed to elucidate the specific mechanism through which AVI affects chondrocytes in osteoarthritis (OA).
AVI has been shown to exert anti-OA effects by reducing the levels of inflammatory markers, such as tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, and IL-6 in serum, inhibiting the activities of various extracellular matrix (ECM)-degrading enzymes, including MMP13, and attenuating OA pathology progression.
Evidence strength: Preclinical (animal and cell-based). These are encouraging mechanistic findings, but human clinical data are absent.
4.3 Neuroprotection and Neurodegenerative Disease
Zhang et al. found that Dipsacus asper extract significantly ameliorated animal performance impairment in the passive avoidance task and suppressed the overexpression of hippocampal Aβ immunoreactivity. This animal study used a model of Alzheimer's-type memory impairment.
Indoleamine 2,3-dioxygenase 1 (IDO) is responsible for the progression of the kynurenine pathway, which has been implicated in the pathophysiology of inflammation-induced depression. It has been reported that asperosaponin VI (ASA VI) could play a neuroprotective role through anti-inflammatory and antioxidant mechanisms. In a mouse study, researchers examined the antidepressant effect of ASA VI in lipopolysaccharide (LPS)-treated mice and further explored its molecular mechanism by looking into the microglial kynurenine pathway. The mice received ASA VI (10 mg/kg, 20 mg/kg, 40 mg/kg, and 80 mg/kg, i.p.) 30 min before LPS injection.
Evidence strength: Preclinical (animal and in vitro) only. No human neurological or psychiatric trials.
4.4 Lyme Disease (Borreliosis) — Anti-Borrelia Activity
Teasel root, particularly D. fullonum and D. sylvestris, has attracted attention as a potential adjunct for Lyme disease, a claim popularized in Western alternative medicine. This area has received some in vitro scientific scrutiny.
Extracts of Dipsacus sylvestris have been studied against Borrelia afzelii. Its extracts — 70% ethanol (hydrophilic) as well as ethyl acetate and dichloromethane (both lipophilic) — were tested for their activity in vitro during an 8-day period. The ethanolic extract showed no growth inhibition against spirochetes, whereas two lipophilic fractions demonstrated significant growth-inhibiting activity, with the strongest inhibition found in the ethyl acetate extract. Greater than 95% growth inhibition by these apolar extracts was achieved at a concentration of 2 mg/ml on the first day of treatment.
A more recent study focused on leaf rather than root extracts. This study aimed to evaluate the activity of Dipsacus fullonum L. leaves extract (DE) and its fractions against stationary phase B. burgdorferi in vitro. DE showed high activity against stationary phase B. burgdorferi (residual viability 19.8 ± 4.7%); however, it exhibited a noticeable cytotoxicity on NIH cells (viability 20.2 ± 5.2%). The iridoid-glycoside fraction showed a remarkable anti-Borrelia effect and reduced cytotoxicity. The iridoid-glycoside fraction was further purified and shown to contain two main bioactives — sylvestrosides III and IV — that showed a considerable anti-Borrelia activity being the least toxic to murine fibroblast NIH/3T3 cells.
Previously, bioactives from wild teasel roots have exhibited minimal activity against Lyme disease; however, studies have demonstrated the significant differences in composition of leaves from that of the root.
There are no robust clinical trials or peer-reviewed studies demonstrating that teasel root or teasel extracts directly treat or cure Borrelia burgdorferi infection, the causative agent of Lyme disease. Some in vitro studies have examined herbal extracts for antimicrobial activity.
Evidence strength: In vitro only. The cytotoxicity concerns noted in whole-leaf extracts highlight that selectivity remains a major challenge. There are no human trials. The use of teasel root for Lyme disease specifically lacks scientific support.
4.5 Wound Healing and Angiogenesis
Wound therapy remains a clinical challenge due to the complexity of healing pathology and high demand of achieving functional and aesthetically satisfactory scars. Newly formed blood vessels are essential for tissue repair since they can support cells at the wound site with nutrition and oxygen. One study investigated the effects of Asperosaponin VI (ASA VI) isolated from the root of Dipsacus asper Wall, in promoting angiogenesis, as well as its function in wound therapeutics. This study found ASA VI promotes angiogenesis via up-regulation of HIF-1α/VEGF signaling in a rat model.
Evidence strength: Preclinical (animal model). No human wound-healing trials.
4.6 Hepatoprotective Effects
Asperosaponin VI protects against alcohol-induced hepatic steatosis and injury via regulating lipid metabolism and ER stress (a 2023 preclinical finding). The current scientific literature data indicate that these plants and their constituents have various biological properties, including antiarthritic, anti-neurodegenerative, anti-inflammatory, antioxidant, anticancer, and antimicrobial activities; they have also been found to protect the liver, heart, and kidney.
Evidence strength: Preclinical only.
4.7 Uterine Stability and Anti-Abortion Use
Dipsaci Radix (DR), the dried root of Dipsacus asper Wall, has been used to treat pregnant disorders for thousands of years, and currently has been ranked as the first selective herb for prevention of miscarriage clinically; however, there is no sufficient evidence so far to assess its safety. Among these, asperosaponin VI (ASD VI) sourced from the Dipsacus radix is the primary active ingredient, which has pharmacological effects like prevention of recurrent spontaneous abortion (RSA), analgesic and anti-inflammatory properties, as well as protection of nerves, the hepatic system, and cardiomyocytes.
Evidence strength: Traditional use supported by limited preclinical and some observational data. No placebo-controlled human trials are available in the accessible English-language literature.
4.8 Antidepressant and Anxiolytic Effects
Results propose a promising antidepressant effect for ASA VI possibly through the downregulation of IDO expression and normalization of the aberrant glutamate transmission. This is based exclusively on a mouse model using intraperitoneal administration. No clinical data exist.
Evidence strength: Preclinical (animal) only.
5. Body Systems and Health Areas
Based on the peer-reviewed literature, the following body systems and health areas have been investigated, with the level of evidence noted:
- Musculoskeletal system (bones, joints, tendons, ligaments) — Most extensively studied; predominantly preclinical animal and in vitro evidence.
- Central nervous system (neuroprotection, Alzheimer's disease pathology, depression) — Preclinical evidence from cell culture and animal models.
- Cardiovascular system (myocardial protection, angiogenesis) — Preclinical.
- Hepatic system (hepatoprotection, liver fat metabolism) — Preclinical.
- Reproductive system (prevention of spontaneous abortion, uterine bleeding) — Traditional use with limited preclinical data; safety in pregnancy is uncertain.
- Immune / Antimicrobial (anti-Borrelia, anti-inflammatory, immunomodulation) — In vitro and animal evidence only.
- Integumentary system (wound healing, skin conditions) — Preclinical animal evidence for wound healing; traditional use for skin complaints.
- Digestive system (stomachic, antiulcer) — Traditional use; limited modern preclinical investigation.
The current scientific literature data indicate that these plants and their constituents have various biological properties, including inter alia antiarthritic, anti-neurodegenerative, anti-inflammatory, antioxidant, anticancer, and antimicrobial activities; they have also been found to strengthen tendon and bone tissue and protect the liver, heart, and kidney.
6. Dosage Forms and Reported Dosages
The herb is most often discussed for joint support, connective tissue recovery, and traditional rheumatic complaints, but human trials are lacking. There is no clinically validated oral dosage range for Dipsacus fullonum.
The following dosages appear only in preclinical research, and are reported here strictly as observed in the cited studies:
- Subchronic toxicology study (rat, oral water extract):
Radix Dipsaci water extract (RD-wE) was administered orally to rats at doses of 0, 125, 250, 500, 1000, and 2000 mg/kg body weight/day for 13 weeks. During the treatment period there were no mortalities attributed to RD-wE.
- Collagen-induced arthritis (mouse, oral aqueous extract):
The aqueous extract of D. asperoides roots at concentrations of 50 mg/kg and 100 mg/kg, administered orally once a day for 21 days, displayed antiarthritic effects in collagen-induced rheumatoid arthritis in male DBA/1 mice.
- Antidepressant study (mouse, intraperitoneal asperosaponin VI):
To generate the model, LPS (0.83 mg/kg) was administered intraperitoneally to mice. The mice received ASA VI (10 mg/kg, 20 mg/kg, 40 mg/kg, and 80 mg/kg, i.p.) 30 min before LPS injection.
- Asthma model (mouse, oral):
DA (20 and 40 mg/kg) was administered to mice by oral gavage on days 18 to 23.
- Embryotoxicity study (mouse, oral aqueous extract):
Pregnant ICR mice were orally treated with DR aqueous extracts at dosages of 0 (distilled water), 2, 8, and 32 g/kg/d.
In TCM clinical practice, Radix Dipsaci is typically prescribed as part of multi-herb decoctions. DR aqueous extracts at the dosage of 8 or 32 g/kg/d (4.3 or 17.2 times the recommended daily dosage for adult humans respectively) might cause adverse impacts on maternal health and embryo-fetal development. This finding refers to animal data and cannot be directly translated to human dosing.
7. Safety Considerations and Interactions
General Animal Toxicology
The Radix Dipsaci water extract was administered orally to rats at doses of 0, 125, 250, 500, 1000, and 2000 mg/kg body weight/day for 13 weeks. During the treatment period there were no mortalities attributed to RD-wE. Moreover, no toxic effects were observed with regard to body weight, clinical pathology (hematology, clinical biochemistry, and urinalysis), and anatomic pathology (gross findings, organ weight, and microscopic examination). The only treatment-related observations at high doses were excessive salivation and soft feces in male and female rats at 1000 or 2000 mg/kg/day.
Developmental and Embryotoxic Risk
This is the most significant safety signal identified in the published literature. DR aqueous extracts at the dosage of 8 or 32 g/kg/d (4.3 or 17.2 times the recommended daily dosage for adult humans respectively) might cause adverse impacts on maternal health and embryo-fetal development. Dipsaci Radix has been used to treat pregnant disorders for thousands of years, and currently has been ranked as the first selective herb for prevention of miscarriage clinically; however, there is no sufficient evidence so far to assess its safety. This creates a significant paradox: the herb is used traditionally in pregnancy, yet animal toxicology data at higher doses indicate developmental risk.
Cytotoxicity at Higher Concentrations
In the anti-Borrelia leaf extract study, the whole-leaf extract showed high activity against stationary phase B. burgdorferi (residual viability 19.8 ± 4.7%); however, it exhibited a noticeable cytotoxicity on NIH cells (viability 20.2 ± 5.2%). This demonstrates that selectivity between antimicrobial and cytotoxic effects is narrow for whole extracts, underscoring the importance of fractionation for any potential therapeutic application.
Procoagulant Activity
Due to the chemical dipsacus saponin C, Dipsacus asper has medically significant procoagulant properties, that is likely due to an increase of intracellular calcium, and apoptosis of mitochondria. This property is relevant for individuals taking anticoagulant medications or those with coagulation disorders.
Limitations of Safety Data
Despite ethnomedicinal benefits of Radix Dipsaci, there is very little information regarding its in vivo toxicity or adverse effects. Although herbal materials have many ethnomedicinal benefits, their toxicity or potential side effects remain relatively unexplored, and their medical potential frequently lacks a scientific basis.
Drug Interactions
No specific clinically documented drug interactions with teasel preparations have been identified in the peer-reviewed literature reviewed. Given the confirmed procoagulant activity of dipsacus saponin C, a theoretical interaction with anticoagulant and antiplatelet agents warrants attention. The absence of human pharmacokinetic data makes it impossible to characterize these interactions with precision.
8. Regulatory and Pharmacopoeial Status
The genus Dipsacus has been used for centuries in Chinese and Korean folk medicines to treat bone and joint problems. The Korean Herbal Pharmacopoeia and Chinese Pharmacopoeia include Dipsaci radix, the dried roots of D. asperoides. Asperosaponin VI (ASA VI), the primary bioactive triterpenoid saponin marker of Dipsacus asper Wall. (Chinese Pharmacopoeia 2020), possesses significant neuroprotective, anti-inflammatory, and osteogenic activities. There is no listing of teasel in current EMA, ESCOP, or German Commission E monographs for D. fullonum, and it is not recognized by the NIH Office of Dietary Supplements or the WHO in a formal monograph as of the available evidence.
Dipsacus fullonum is an herbaceous biennial native to Europe, western Asia, and northern Africa. Often considered a noxious weed in countries where the plant has been introduced, teasel actually has a history of use in traditional European herbalism for its healthful properties.
Teasel is considered an invasive species in the United States. It is known to form a monoculture, capable of crowding out all native plant species, and therefore is discouraged or eliminated within restored open lands.
9. Summary of Evidence Status
Teasel contains a number of bioactive substances (iridoid glycosides, triterpenoid saponins, polysaccharides, phenolic acids), whose research brings interesting results, including effects on the nervous system. So far, however, only preclinical studies are available.
Teasel (Dipsacus spp.) occupies a position common to many traditional herbs: a well-documented role in multiple historical healing systems (particularly TCM and European folk medicine), a rich and increasingly characterized phytochemical profile, and a growing body of mechanistic in vitro and animal research — but a nearly complete absence of controlled human clinical trials. The plant is better understood as a traditional herb with evolving laboratory interest than as a validated modern remedy. The distinction is especially important when the herb is marketed alongside better-studied connective-tissue or joint botanicals. A plant can be historically interesting and biochemically active without being clinically established.
References
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