IngredientesScabrous Gentian is botanically known as Gentiana scabra, also called the Japanese Gentian or the Rindō Flower, a species of flowering plant in the Gentian family (Gentianaceae), found in much of East Asia. Additional common names registered in botanical databases include "Korean gentian" and "Long Dan" in Chinese. The species was first described by Alexander von Bunge in 1835. The genus name Gentiana derives from Gentius, the last king of Illyria (circa 180–168 BCE), who is credited with discovering the medicinal properties of gentian plants; the specific epithet scabra comes from the Latin scaber, meaning rough or scabrous, alluding to the rough texture of the leaves.
Accepted synonyms for G. scabra include Gentiana fortunei Hook. and Dasystephana scabra (Bunge) Soják. In the Chinese Pharmacopoeia, the roots and rhizomes of four species from the genus Gentiana are recorded as the original materials of "Long-Dan" (called Gentianae Radix et Rhizoma): G. manshurica, G. scabra, G. triflora, and G. rigescens, which are distributed in different areas of China.
Scabrous Gentian is a perennial herbaceous plant in the Gentianaceae family, characterized by its erect stems that arise from a stout rhizome and reach heights of 30–60 cm. The stems are typically unbranched or sparingly branched, with a slightly rough texture apically due to papillate hairs; as a member of the Gentianaceae, it shares typical gentian traits such as opposite leaf arrangement and trumpet-shaped flowers, adapted for pollination by insects. The plant features lance-shaped leaves and trumpet-shaped flowers that are predominantly blue to purple, blooming profusely in the summer and fall.
Gentiana scabra is a semi-deciduous perennial herb native to moist meadows, grasslands, and alpine regions in East Asia, including Japan, Korea, and parts of China. G. scabra often grows on hillsides, grasslands, roadsides, river beaches, shrubs, or forest edges at an altitude of 400–1,700 metres, and is distributed in China, Russia, North Korea, and Japan.
Gentiana scabra Bunge, commonly known as 'Long Dan Cao' in China, has been used in traditional Chinese medicines for more than 2000 years; dry roots and rhizome of the herb have been used for the treatment of inflammation, anorexia, indigestion, and gastric infections. In spring and autumn, people gather the roots and rhizomes of G. scabra, wash them with water, remove impurities, dry them in the sun, cut them into sections, and make them into Chinese herbal medicines. Infusions, decoctions, and macerations of gentian roots and rhizomes have been used as a bitter digestive tonic. The species is difficult to mass propagate by seed due to the low percentage of germination and limited dormancy period, and wild populations in some locations are considered to be in the endangered category due to over-exploitation.
Known as 'Long Dan Cao' in China, Gentiana scabra has been used in traditional Chinese medicines for more than 2000 years. It first appeared in the Shennong Ben Cao Jing in the late Western Han Dynasty (around 100 BCE). In traditional Chinese medicine (TCM), Scabrous Gentian is primarily used to clear heat and dampness from the liver and gallbladder systems, and has historically been prepared in decoctions or tinctures to address ailments such as fever, jaundice, hepatitis, red or painful eyes, and urinary tract issues. Dried roots and rootstocks have been used to eliminate damp-heat and quench the fire of the liver and gall bladder.
G. scabra and Gentiana macrophylla have been used in Chinese herbalism for over 2000 years as excellent tonics for the digestive system, working on the stomach, liver, and gall bladder. Long Dan Cao is used in formulas to treat conjunctivitis, high blood pressure, acute urinary infections, testicular pain, leucorrhea, vaginal pain, tantrums in children, fever, and balance problems. Long-Dan-Xie-Gan-Tang is the most commonly prescribed Chinese herbal formula for chronic hepatitis, recorded in ancient Chinese medicine as having inhibitive effects on inflammatory diseases of the liver or gall bladder; G. scabra is one of the key herbal components in this formula.
The four official Pharmacopoeia species are distinguished: the three northeastern species (G. scabra, G. manshurica, G. triflora) are collectively known as "Guan Long Dan," and the Yunnan species (G. rigescens) is known as "Jian Long Dan" or "Dian Long Dan."
Gentiana scabra roots are used as a bitter tonic in traditional Chinese medicine, where it is said to promote digestive secretions and treat a range of illnesses associated with the liver; it is also used in traditional Tibetan medicine. Gentiana scabra is a commonly used herb in Tibetan medicine, which has received much attention in recent years due to its diverse pharmacological properties, including anti-inflammation, anti-oxidation, and anti-fibrosis.
In Iranian traditional medicine, Gentiana species are attributed with numerous medicinal properties, particularly related to their roots; in the past, they were used to treat urinary retention, menstrual disorders, and inflammation of the liver, spleen, and stomach.
A classical formula known as Long-Dan-Xie-Gan-Tang (LDXGT) contains ten herbal medicines including Gentiana scabra (Long-Dan-Cao) in a defined weight ratio, and is used for acute or chronic hepatitis, accounting for 23.5% of herbal formula prescriptions for chronic hepatitis in Taiwan. Among the top 10 Chinese herbal formulas prescribed for chronic hepatitis in Taiwan, Long-Dan-Xie-Gan-Tang, which consists of Gentiana scabra and other plants, was the most common. The classical description of the herb's use in herpes zoster dates to at least 1617, recorded in the Chinese medical text Wai Ke Zheng Zong (Orthodox Manual of External Diseases).
Compounds isolated from Gentiana species include essential oils, iridoids and secoiridoids, xanthones, triterpenoids, and flavones; iridoids and secoiridoids, comprising the majority of isolated compounds, are considered the most important substances responsible for the bioactivities. A comprehensive literature review (2004–2024) compiled 172 constituents from G. scabra and related species, including terpenoids (66 iridoids, 47 triterpenoids, and others), flavonoids, lignans, and alkaloids.
Gentiopicroside (a secoiridoid glucoside) and swertiamarin are two of the most important active components used for gentian identification. Five major compounds — loganic acid, swertiamarin, gentiopicroside, sweroside, and isoorientin — have been extracted by solvent extraction techniques and analyzed by Reversed-phase High-Performance Liquid Chromatography (RP-HPLC). Gentianae Scabrae Radix (the official crude drug derived from Gentiana scabra) consists mainly of secoiridoid glycosides, with representatives of gentiopicroside, sweroside, and swertiamarin.
In all root batches analyzed, the secoiridoid gentiopicroside dominated, representing 2.1–5.6% by weight over all other metabolites. Gentiopicroside and loganic acid are listed in the Chinese Pharmacopoeia (ChP) as the standard markers for quality control. Iridoid and secoiridoid contents are affected greatly by age, physiology, and growing environment of the plant.
High-performance liquid chromatography analysis revealed that the major polyphenolic constituents of aqueous G. scabra extract include kaempferol, ellagic acid, and quercetin. The medicinal properties of the crude herbal drug are attributed to bitter glycosides, flavonoids, and xanthones — the main plant secondary metabolites.
These plant-derived molecules, especially naturally occurring xanthones, possess a broad spectrum of bioactivity, being anticarcinogenic, antimicrobial, neuroprotective, antidiabetic, and cardioprotective. Gentianine, one of the main active metabolites of Gentiana scabra, possesses anti-diabetic effects.
Gentiopicroside (GPS), the principal secoiridoid glycoside found in Gentiana scabra Bunge, exhibits diverse pharmacological properties, including anti-inflammatory, antioxidant, neuroprotective, hepatoprotective, antidiabetic, antitumor, and skin disease-modulating effects. GPS modulates key signaling pathways, such as NF-κB and MAPK, to suppress pro-inflammatory cytokines and oxidative stress, and activates the Keap1-Nrf2 pathway to enhance cellular antioxidant defenses while exhibiting direct free radical scavenging capabilities.
A chemical investigation of the CHCl₃ extract of Gentianae Scabrae Radix yielded seven new and ten known secoiridoid glycosides; all 17 compounds were evaluated for their inhibitory effects against nitric oxide (NO), IL-6, and TNF-α productions induced by lipopolysaccharide (LPS) in RAW264 cells.
The liver-protective properties of Gentiana are primarily attributed to its ability to enhance bile production, support detoxification processes, and reduce liver inflammation; hepatoprotective activities are related to sweroside, swertiamarin, and gentiopicrin — key constituents of the Gentiana root. One investigative study demonstrated a regulatory effect of G. scabra on pro-inflammatory macrophages in NAFLD, finding that the non-canonical IKK family member TANK-binding kinase 1 (TBK1) was involved in this process. GPS's hepatoprotective effects include mitigating chemical- and alcohol-induced liver damage by regulating lipid metabolism and reducing fibrosis.
Studies have shown that aqueous G. scabra extract (GS) exhibits anti-lipid peroxidation, DPPH radical, and superoxide radical scavenging activities with IC₅₀ values of 45.84, 183.38, and 56.25 µg/mL, respectively. The antioxidant activities and polyphenolic compounds — kaempferol, ellagic acid, and quercetin — of GS may contribute to its hepatoprotective activity, with a mechanism possibly mediated through the reduction of oxidative stress in liver tissue.
Traditional use of Gentiana scabra in Korean medicine for diabetes is linked to data showing that its root extract boosts GLP-1 secretion and lowers blood glucose in db/db mice. Researchers suggest the actions come from bitter glycosides, which cause the body to release glucagon-like peptide 1 (GLP-1) — a hormone that helps absorb nutrients and links absorption to insulin, resulting in lower blood sugar and a possible anti-diabetes effect.
Studies demonstrate that gentiopicroside can inhibit RANKL-induced osteoclast formation, suppress the expression of osteoclast-related proteins, and block the activation of NF-κB and JNK signaling pathways, thereby inhibiting osteoclast differentiation and bone resorption.
Gentiopicroside ameliorates stress-induced gastrointestinal dysmotility in rat models by upregulating motilin receptor expression and downregulating vasoactive intestinal peptide receptor 2 (VIPR2) levels, thereby enhancing gastric emptying and intestinal peristalsis. In ethanol-induced gastric mucosal injury models, gentiopicroside upregulates heat shock protein-70 (HSP70), restores epidermal growth factor (EGF) and vascular endothelial growth factor (VEGF) levels, and promotes mucosal repair.
The rhizomes of Gentiana scabra are used in TCM to treat hepatitis, stomatitis, and inflammatory diseases; research has aimed to examine the protective effects of G. scabra aqueous extract (GS) and polyphenols in the liver of CCl₄-intoxicated mice. Daily oral administration of 500 mg/kg GS and 1000 mg/kg GS significantly prevented the elevation of glutamic pyruvic transaminase and thiobarbituric acid reactive substances levels, while enhancing antioxidant enzyme levels (superoxide dismutase, catalase, and glutathione peroxidase); at 1000 mg/kg, GS was as effective as 100 mg/kg silymarin in reducing oxidative stress and preventing liver injury. This was a preclinical animal study; no equivalent human data were reported.
Research has demonstrated that G. scabra (GS) could inhibit the activation of hepatic stellate cells, resulting in an alleviation of fibrosis formation, and may regulate lipid peroxidation to improve hepatic dysfunction; one study revealed that its extract significantly ameliorated liver steatosis and inflammation in high-fat-fed mice. In an in vitro and in vivo study of NAFLD, metabolic burden was found to upregulate the phosphorylation of TBK1, resulting in activation of NF-κB signaling and elevated MCP1 expression; GS inhibited TBK1 phosphorylation and MCP1 expression to restrain the recruitment of pro-inflammatory macrophages, providing curative effects on metabolic dysfunction and inflammation. This evidence is preclinical (animal and cell-based); robust human clinical trials for liver disease specifically attributable to G. scabra alone are lacking.
Clinically, gentiopicroside demonstrates hepatoprotective, antiviral, and neuroprotective effects, with applications in herpes zoster, non-alcoholic fatty liver disease, and metabolic disorders — though these clinical applications largely refer to research on the isolated compound or multi-ingredient formulas.
One systematic review and meta-analysis specifically reviewed the biological action of key herbs and evaluated systematically the efficacy and safety of oral Gentiana formula for herpes zoster (HZ). Randomized controlled trials using Gentiana formula for HZ were identified from nine English and Chinese databases, with the primary outcome being evaluation of pain; potential risk of bias was assessed, and meta-analysis was conducted using mean difference or risk ratio with 95% confidence intervals. Key herbs including Gentiana scabra Bunge have shown anti-inflammatory actions through inhibition of inflammatory cytokines and pro-inflammatory enzymes; 26 clinical studies involving 2,955 participants were included, and modified Gentiana formula resolved pain earlier than pharmacotherapy when used alone or combined with topical Chinese herbal medicine.
Limitation: All studies used multi-herb formulas rather than G. scabra as a single ingredient, making it impossible to isolate the contribution of this herb alone. The quality of included trials was variable, and many were from Chinese-language databases without independent replication.
Among herbal formulas for vitiligo and related skin conditions, Zi-ni-bai-ling-fang consists of G. scabra and other plants; there is superior effectiveness in those receiving oral herbal medicine plus narrow-band ultraviolet B (NB-UVB) when compared to phototherapy alone. One preclinical study evaluated anti-skin-lesion properties of Gentiana scabra Bunge roots in a contact dermatitis mouse model. Again, these findings are from animal or combination-formula studies; no controlled human trials isolating the effect of G. scabra alone in dermatological conditions have been identified.
No clinical trials support the traditional use of gentian to stimulate appetite, improve digestion, or treat gastrointestinal complaints. The classic role of Gentiana lutea root as a "stomach bitter" is backed by a human cross-over study showing that micro-encapsulated secoiridoids lowered 24-hour energy intake and modulated gut hormone release after a test meal. However, this study involved G. lutea, not G. scabra specifically.
Numerous species of gentian native to China are used in Chinese traditional medicine; Radix Gentianae Scabrae (Chinese or Japanese gentian) is indigenous to Korea, China, and Japan, and contains chemical constituents similar to those of G. lutea.
Animal experiments have confirmed that gentiopicroside has multiple pharmacological activities, including antifungal, antibacterial, anti-inflammatory, hepatoprotective, and free radical scavenging effects. The natural compound GPS, extracted from Gentiana scabra, has gained increasing scientific recognition for its ability to improve metabolic disorders; growing evidence shows that GPS effectively alleviates diabetes and its chronic complications through multiple mechanisms, with studies primarily focused on how GPS improves type 2 diabetes mellitus by reducing oxidative stress, inflammatory responses, and gluconeogenesis. All current evidence originates from animal and in vitro models; no dedicated human clinical trials exist for G. scabra extract or GPS specifically targeting glycaemic control.
Recent pharmacological research has indicated that polysaccharides isolated from Gentiana scabra Bunge roots exhibit antioxidant and immunological effects; extracts of G. scabra (probably secoiridoid and its glycosides) significantly inhibit SARS-associated coronavirus replication and produce hepatoprotective effects. Additionally, Gentiana scabra exhibits anti-atherosclerotic properties. In a screen of over 30 anti-inflammatory Chinese herbs, Gentiana scabra effectively reduced oxidized LDL (OxLDL) uptake in nontoxic therapeutic concentrations, possibly through the suppression of scavenger receptors. This evidence is in vitro only.
In neurodegenerative diseases like Alzheimer's and Parkinson's, GPS reduces amyloid-β accumulation and dopaminergic neuron loss, respectively. These findings are from preclinical research; no human clinical trials have been conducted on G. scabra for neurological conditions.
Research into G. scabra ethanol-water extract demonstrated that its active metabolites are potent agents for accelerating fracture repair, and findings suggest that gentisin, gentiopicroside, and isoorientin are promising candidates for further preclinical development. Studies demonstrate that gentiopicroside can inhibit RANKL-induced osteoclast formation, suppress the expression of osteoclast-related proteins, and block the activation of NF-κB and JNK signaling pathways, thereby inhibiting osteoclast differentiation and bone resorption. This research is currently at the in vitro and animal model stage.
Phytochemical studies have led to the isolation and identification of 602 compounds from Gentiana species, including iridoids, triterpenoids, flavonoids, lignans, coumarins, xanthones, alkaloids, and polysaccharides; gentiopicroside and swertiamarin are the most studied monomeric compounds. Crude extracts of Gentiana show a broad spectrum of pharmacological activities — anti-inflammatory, analgesic, anti-bacterial, antioxidant, anti-tumor, anti-diabetic, immunomodulatory, hepatoprotective, gastroprotective, neuroprotective, and joint and bone protective — and these extracts exhibit no apparent toxicity in vivo and in vitro. However, clinical research on the therapeutic applications of Gentiana remains limited.
The dosage of Long Dan Cao in TCM practice is typically controlled between 3–6 g. Infusions, decoctions, and macerations of gentian roots and rhizomes have been used as a bitter digestive tonic in doses of 1 to 4 g/day. There are no clinical studies to substantiate this dosage recommendation.
In the classical multi-herb formula context, one Gentiana formula package contains G. scabra Bunge (Long Dan Cao, root and rhizome) at 6 g alongside other constituent herbs.
In preclinical hepatoprotection research, daily oral administration of 500 mg/kg and 1000 mg/kg of aqueous G. scabra extract was used in mice; at 1000 mg/kg, effects were comparable to 100 mg/kg silymarin. These are animal study dosages and cannot be directly extrapolated to human use.
At present, there is no data showing that G. scabra at prescribed doses has toxic effects, and there are no reports of serious adverse reactions when it is taken in accordance with the prescribed dose.
Gentian is contraindicated in gastric or duodenal ulcer and hypertension. Due to its stimulation of gastric acid secretion, it is contraindicated for individuals with peptic ulcers, gastroesophageal reflux disease (GERD), or hyperacidity.
The extract may cause headache, nausea, and vomiting. Some individuals may experience allergic reactions such as rash, itching, or difficulty breathing; those with known allergies to plants in the Gentianaceae family should exercise caution. Due to its bitter nature, gentian root extract may cause gastrointestinal discomfort, nausea, or diarrhea in some people, especially when taken in excessive amounts.
Gentiana scabra is not recommended during pregnancy and lactation due to a lack of sufficient safety data. Gentian root extract should be avoided by pregnant or breastfeeding women, as its safety during these periods has not been thoroughly established.
Drug interactions with Gentiana are none well documented. A preclinical study investigating a multi-herb formula containing Gentiana scabra noted that the preparation had a significant effect on cytochrome P450 enzymes in rat liver, especially cytochrome P450 1 (CYP1) subtype. This finding is from a compound-formula preclinical study, and the contribution of G. scabra specifically to CYP enzyme modulation has not been characterized in isolation in human subjects.
Most Gentianaceae species are rare and endangered by uncontrolled overharvesting and influences of various environmental factors, including habitat loss, climate change, and invasive species spreading. Wild populations of G. scabra in some locations are considered to be in the endangered category due to over-exploitation.
The root of Gentiana scabra is commonly known as Longdan in Chinese herbal medicines; due to high market demand, G. scabra plants are not the only source of Longdan in China — other Gentiana species, G. triflora, G. manshurica, and G. rigescens, are also recognized as Longdan in China. Though iridoid and secoiridoid glucosides were reported as the main constituents in all "Long-Dan" species, the four different species also result in different minor components, which may relate to their pharmacological activities. There is significant variation in efficacy between different species of Gentiana; for instance, G. scabra is known for higher concentrations of certain iridoids like gentiopicroside, which contributes to its prominent anti-inflammatory and hepatoprotective properties.
Condiciones de salud que Genciana Áspera puede ayudar a apoyar.
Scabrous Gentian (Gentiana scabra, Long Dan Cao in TCM) is among the most important TCM herbs for liver and gallbladder heat conditions including cholecystitis and biliary infections, listed in the Chinese Pharmacopoeia. Its bitter alkaloids and iridoids have documented choleretic and anti-inflammatory activity. It is the principal herb in Long Dan Xie Gan Wan for gallbladder disease.
Sistemas corporales que Genciana Áspera puede ayudar a apoyar.
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