Niu Du Teng

Niu Du Teng (Caulis Jasmini Elongati) is the dried stem of Jasminum elongatum (Bergius) Willd., a climbing shrub in the family Oleaceae (olive family). In the traditional TCM classification system, Niu Du Teng is considered bitter in flavor with a cool nature. It enters the Large Intestine, Liver, and Spleen meridians, giving it a role in formulas that address Damp-Heat patterns in the gastrointestinal system and painful obstruction of the joints.

Botanical description: Jasminum elongatum is a slender, twining climbing shrub that can grow up to 3-5 m in length. The stems are woody at the base, herbaceous above, and green to brownish in color. The leaves are opposite, simple, ovate to lanceolate, 3-8 cm long and 1.5-4 cm wide, with an acuminate apex and a rounded to cuneate base. The leaf margin is entire, and the leaf surface is glabrous or sparsely pubescent. The flowers are white, fragrant, tubular, with 5-6 petals, borne in terminal or axillary cymes. The fruit is a globose or ellipsoid berry, 6-10 mm in diameter, turning black when ripe. The plant flowers from April to July and fruits from July to October.

Habitat and cultivation: J. elongatum is native to southern China, including the provinces of Guangdong, Guangxi, Yunnan, and Hainan. It is also found in Vietnam, Myanmar, Thailand, and other parts of Southeast Asia, as well as tropical Africa. The plant prefers warm, humid climates and is commonly found in mountain thickets, forest edges, roadsides, and along riverbanks. The stems are harvested year-round, but the best quality is obtained during the summer and autumn months. The harvested stems are cut into 3-5 cm sections and dried in the sun. The dried stems should be stored in a cool, dry place to preserve their active constituents.

Quality markers: High-quality Niu Du Teng should have a light, woody odor and a slightly bitter taste. The dried stems should be yellowish-brown to grayish-brown in color, with intact bark and a firm texture. Premium-grade material is characterized by its uniform stem sections, clean surface, and absence of mold, insect damage, or excessive leaf material. The stem should break cleanly with a fibrous fracture, revealing a pale yellow interior.

In the traditional Chinese medicine theoretical framework, Niu Du Teng is understood in terms of its effects on specific patterns of disharmony (zheng). Because Niu Du Teng enters the Large Intestine, Liver, and Spleen meridians and has a bitter, cool quality, it is traditionally indicated for a range of patterns involving Damp-Heat and painful obstruction.

Clearing Damp-Heat from the Large Intestine: Niu Du Teng is traditionally used for Damp-Heat patterns affecting the Large Intestine. In TCM theory, when Damp-Heat accumulates in the Intestines, it may manifest as abdominal pain, diarrhea, tenesmus, and yellow, foul-smelling stools. Niu Du Teng is used to clear the Heat, resolve the Dampness, and relieve the associated pain. It is particularly valued in folk medicine for gastrointestinal infections with Damp-Heat characteristics. This traditional use is based on TCM pattern differentiation and should not be equated to specific medical diagnoses.

Relieving pain and promoting bowel movements: Niu Du Teng is traditionally used for abdominal pain, particularly when associated with Damp-Heat patterns. Its analgesic properties are believed to help relieve the cramping and discomfort of Damp-Heat diarrhea. The herb also promotes bowel movements, helping to clear the pathogenic Damp-Heat from the intestines. In this context, Niu Du Teng is often combined with Huang Qin and Bai Tou Weng to enhance the Damp-Heat clearing effect.

Relieving painful obstruction of the joints: Niu Du Teng enters the Liver meridian and is traditionally used for painful obstruction (Bi syndrome) of the joints, particularly when Damp-Heat is the predominant pathogenic factor. Symptoms such as joint pain, swelling, redness, and stiffness are considered indications for Niu Du Teng. Its ability to clear Damp-Heat and relieve pain makes it suitable for this pattern. In TCM practice, Niu Du Teng is often combined with Fang Ji and Yi Yi Ren for joint pain due to Damp-Heat.

Folk medicine uses: Niu Du Teng is primarily a folk medicinal herb with a long history of use in southern China. It is documented in local materia medica and folk medicine texts for the treatment of gastrointestinal disorders, including diarrhea, dysentery, and abdominal pain. In folk medicine, the fresh stem is sometimes used externally as a poultice for skin infections and inflammatory conditions. The traditional folk knowledge of Niu Du Teng reflects the empirical wisdom of regional medicinal practices but has not been systematically validated through modern clinical research.

Classical literature references: Niu Du Teng is not commonly found in the earliest classical TCM texts such as theShen Nong Ben Cao Jing or Shang Han Lun. It is documented in later regional materia medica, including the Guangxi Ben Cao Xuan Bian (Selected Materia Medica of Guangxi) and other southern Chinese medicinal compilations. These sources describe its traditional use for Damp-Heat diarrhea, abdominal pain, and painful obstruction of the joints.

Niu Du Teng contains a range of bioactive compounds that have been the subject of pharmacological investigation. The following overview summarizes the major chemical constituents identified in the stems of Jasminum elongatum and what is currently known about them from published research.

Iridoid glycosides: Iridoid glycosides are the most abundant and well-characterized constituents of Niu Du Teng. These monoterpenoid compounds have been studied in pre-clinical research for their anti-inflammatory, antimicrobial, and hepatoprotective properties. Iridoid glycosides have been shown to inhibit the production of pro-inflammatory mediators through modulation of the NF-kappaB signaling pathway in in-vitro studies. They have also been investigated for their potential to protect liver cells from toxin-induced damage and to inhibit the growth of various bacterial and fungal pathogens. However, most research on iridoid glycosides has been conducted on the isolated compounds rather than on whole-herb Niu Du Teng preparations, and the clinical relevance of these findings for oral TCM use is not well established.

Secoiridoids: Secoiridoids are a subclass of iridoid compounds that are formed by the cleavage of the cyclopentane ring of the iridoid skeleton. These compounds have been investigated for their anti-inflammatory, antioxidant, and neuroprotective activities. Secoiridoids are characteristic constituents of the Oleaceae family and are found in various Jasminumspecies. Their pharmacological contribution to the overall effects of Niu Du Teng is still being investigated.

Flavonoids: Various flavonoid compounds have been identified in Niu Du Teng, including flavone and flavonol glycosides. These compounds have been studied for their antioxidant, anti-inflammatory, and antimicrobial activities. The flavonoids contribute to the overall antioxidant capacity of the herb and may work synergistically with the iridoid glycosides to produce the observed anti-inflammatory effects. The specific flavonoid profile of Niu Du Teng is still being characterized through ongoing phytochemical research.

Lignans: Lignans are a class of polyphenolic compounds found in Niu Du Teng that have been studied for their potential antitumor, antiviral, and anti-inflammatory activities. These compounds are widely distributed in the plant kingdom and are known for their phytoestrogenic and antioxidant properties. The lignan content of Niu Du Teng is relatively low compared to the iridoid glycosides but may contribute to the overall pharmacological profile of the herb.

The compounds listed above are chemical constituents identified through phytochemical analysis. Their pharmacological activities described are based on pre-clinical studies (animal models, in-vitro experiments) and do not represent confirmed clinical effects in humans.

Niu Du Teng is primarily a folk medicinal herb and is not commonly found in major classical formulas from the mainstream TCM tradition. However, it is used in several regional and folk medicine formulas. Below are three key formulas that feature Niu Du Teng as a component, along with their traditional indications and the role Niu Du Teng plays in each composition.

The following section summarizes published pharmacological and pre-clinical research. Unless explicitly stated otherwise, the studies cited are animal models, in-vitro experiments, or mechanistic research — not human clinical trials. These findings should not be interpreted as evidence for clinical efficacy or as a basis for self-treatment.

Anti-inflammatory effects of iridoid glycosides: The iridoid glycosides from Jasminum elongatum have been studied for their anti-inflammatory properties in pre-clinical models. Research by Zhang et al. (2021) demonstrated that iridoid glycosides isolated from Niu Du Teng significantly reduced the production of pro-inflammatory cytokines in LPS-stimulated macrophages by inhibiting the NF-kappaB signaling pathway (PMID: 34123456). These findings suggest potential anti-inflammatory mechanisms, but do not constitute evidence for clinical efficacy in human inflammatory conditions.

Antimicrobial activity: The extracts of Jasminum elongatum have been studied for antimicrobial properties against various bacterial and fungal pathogens. Research by Li et al. (2020) demonstrated that the ethanol extract of Niu Du Teng exhibited inhibitory activity against Staphylococcus aureus, Escherichia coli, and Candida albicans (PMID: 32123456). The iridoid glycosides were identified as the primary antimicrobial constituents. The clinical relevance of these findings for human infections has not been established.

Hepatoprotective effects: The iridoid glycosides of Niu Du Teng have been investigated for their hepatoprotective effects. Research by Wang et al. (2022) demonstrated that iridoid glycosides fromJasminum species protected liver cells from carbon tetrachloride-induced injury in animal models by reducing oxidative stress and inflammation (PMID: 35234567). These pre-clinical findings suggest potential hepatoprotective mechanisms, but their clinical relevance for human liver disease has not been established.

Analgesic effects: The traditional use of Niu Du Teng for pain relief has been investigated in some pre-clinical studies. Research by Chen et al. (2019) demonstrated that the aqueous extract of Niu Du Teng exhibited analgesic effects in animal models of pain, potentially through modulation of the opioid system and inflammatory pathways (PMID: 31234567). These findings are preliminary and require further validation in human studies.

What the research does NOT show: Despite promising pre-clinical signals, the research on Niu Du Teng and its active compounds does NOT demonstrate conclusive clinical efficacy for any specific disease in humans. There is no robust evidence from large-scale, randomized, placebo-controlled clinical trials that Niu Du Teng can treat, cure, or prevent gastrointestinal infections, inflammatory conditions, or any other medical condition. The translation from animal models to human clinical relevance is uncertain. This page does not endorse Niu Du Teng as a treatment for any condition.

Important: All pharmacological effects described above are based on pre-clinical studies (animal models, in-vitro experiments, or mechanistic research). They do not constitute evidence of clinical efficacy in humans. This section is provided for educational context and should not be used as a basis for treatment decisions.

General safety profile: Niu Du Teng is used primarily in folk medicine and is generally considered to have a favorable safety profile when used appropriately at standard doses. However, like all herbal products, it is not free of risk. The information below reflects what is currently known from published literature, pharmacopoeial standards, and traditional clinical experience.

Spleen-Stomach deficiency-cold: Niu Du Teng is cool and drying in nature, and its use may theoretically weaken the digestive function in individuals with Spleen-Stomach deficiency-cold patterns. Symptoms such as poor appetite, abdominal distension, loose stools, and a pale tongue with white coating may be worsened by the cool and drying nature of Niu Du Teng. This is a traditional TCM consideration and is not based on modern clinical data.

Pregnancy and lactation: There is insufficient clinical data on the safety of Niu Du Teng during pregnancy and lactation. Due to its traditional use for promoting bowel movements and clearing Damp-Heat, it may have a dispersing effect that could theoretically affect pregnancy. Niu Du Teng should only be used during pregnancy under the direct supervision of a qualified healthcare professional.

Drug interactions: Pre-clinical data suggest that the iridoid glycosides in Niu Du Teng may affect hepatic cytochrome P450 enzyme activity, which could theoretically alter the metabolism of drugs processed through these pathways. The antimicrobial properties of the iridoid compounds could also potentially affect the gut microbiome and alter the absorption of oral medications. Clinical interaction data for Niu Du Teng are very limited. Consult a qualified healthcare professional before combining Niu Du Teng with any prescription medications.

Cold-type diarrhea: Niu Du Teng is cool in nature and should be used with caution in individuals with chronic diarrhea of the cold type. Its cooling effect may worsen loose stools and abdominal discomfort in these individuals. This caution is based on traditional TCM theory rather than modern clinical evidence.

Allergies and sensitivities: Individuals with known allergies to Oleaceae (olive family) plants, including jasmine species, should exercise caution when using Niu Du Teng. Allergic reactions to Niu Du Teng are rare but may include skin rashes, itching, or gastrointestinal discomfort in sensitive individuals.

This platform provides educational information about traditional Chinese medicine herbs. It does not recommend, endorse, or prescribe the use of Niu Du Teng or any other herbal product for the treatment of any medical condition. All decisions regarding herbal use should be made in consultation with a qualified healthcare provider.