Shi Da Gong Lao Ye

Shi Da Gong Lao Ye (Mahoniae Folium) is the dried leaf of Mahonia bealei (Fort.) Carr., an evergreen shrub in the family Berberidaceae (barberry family). In the traditional TCM classification system, Shi Da Gong Lao Ye is considered bitter in flavor with a cold nature. It enters the Liver, Stomach, Large Intestine, and Lung meridians, giving it a versatile role in formulas that address Damp-Heat patterns, Lung Heat with sore throat, and Heat-toxin conditions.

Botanical description: Mahonia bealei is an evergreen shrub growing 1–5 meters tall, with large, pinnately compound leaves that can reach up to 50 cm in length. Each leaf comprises 4–10 pairs of leathery, ovate-lanceolate to elliptic leaflets, each 5–15 cm long and 2–5 cm wide, with prominent spiny-serrate margins and a glossy, dark green surface. The new leaves emerge with a distinctive bronze or purplish-red coloration before maturing to dark green. The plant produces bright yellow, fragrant flowers in dense, terminal, racemose inflorescences, followed by dark blue to black, ovoid berries. The entire plant is rich in isoquinoline alkaloids, which contribute to both its medicinal properties and its intensely bitter taste.

Habitat and cultivation: Mahonia bealei is native to central and southern China and is widely distributed across the provinces of Zhejiang, Jiangxi, Fujian, Hunan, Hubei, Sichuan, and Guizhou. It is also cultivated as an ornamental plant in many temperate regions worldwide. The plant thrives in well-drained, slightly acidic soils in partial to full shade, and is commonly found in forest margins, thickets, and mountain slopes at elevations of 500–2000 meters. Commercial cultivation for medicinal purposes is most extensive in Zhejiang and Jiangxi provinces. The leaves are typically harvested throughout the growing season, with the highest alkaloid content occurring during the flowering and fruiting periods. After harvesting, the leaves are dried in the sun or in a well-ventilated area until crisp.

Quality markers: High-quality Shi Da Gong Lao Ye should consist of intact or nearly intact compound leaves with dark green, glossy leaflets that have sharp, spinose-serrate margins. The material should have a distinctly bitter taste and a faint, characteristic odor. The Chinese Pharmacopoeia and regional standards set quality criteria based on the content of berberine and total alkaloids. Premium-grade material is characterized by its large, complete leaves, deep green coloration, absence of mold or insect damage, and a strong, persistent bitter taste. Leaves that are yellowed, moldy, or excessively broken are considered inferior.

In the traditional Chinese medicine theoretical framework, Shi Da Gong Lao Ye is understood in terms of its effects on specific patterns of disharmony (zheng). Because Shi Da Gong Lao Ye enters the Liver, Stomach, Large Intestine, and Lung meridians and has a bitter, cold quality, it is traditionally indicated for a range of patterns involving Damp-Heat, Lung Heat, and Heat-toxin accumulation.

Clearing Heat and drying Dampness: Shi Da Gong Lao Ye is one of the primary herbs in TCM for clearing Heat and drying Dampness, particularly when these pathogenic factors affect the Liver and Gallbladder or the gastrointestinal tract. In TCM theory, Damp-Heat in the Liver and Gallbladder may present as jaundice with a yellowish skin and sclera, bitter taste in the mouth, dry vomiting, and a yellow, greasy tongue coating. Shi Da Gong Lao Ye is traditionally used to drain this Damp-Heat through its bitter, cold properties. It may be combined with Yin Chen Hao and Zhi Zi in formulas derived from Yin Chen Hao Tang (Capillary Wormwood Decoction) to enhance the Heat-clearing and Dampness-draining effect.

Soothing sore throat and clearing Lung Heat: Shi Da Gong Lao Ye is traditionally valued for its ability to clear Lung Heat and soothe a sore, inflamed throat. When Wind-Heat or Lung Heat affects the upper respiratory tract, symptoms such as a red, swollen, painful throat, difficulty swallowing, and a dry cough may occur. Shi Da Gong Lao Ye's bitter-cold nature is believed to directly reduce Heat and inflammation in the throat. In clinical practice, it is often combined with Jie Geng (Platycodon root) and Gan Cao (Licorice root) in decoctions for acute throat inflammation. This traditional use is based on TCM pattern differentiation and should not be equated to specific Western medical diagnoses.

Resolving toxicity and treating Heat-toxin conditions: Shi Da Gong Lao Ye is traditionally used for conditions attributed to the accumulation of Heat-toxin (re du). These may include inflammatory skin conditions such as boils, carbuncles, eczema, and rashes. In TCM theory, Heat-toxin is a pathogenic factor that can manifest as red, swollen, painful skin lesions with or without pus formation. Shi Da Gong Lao Ye may be used both internally and topically (as a wash or poultice) for these conditions. Internally, it is often combined with Jin Yin Hua (Honeysuckle) and Lian Qiao (Forsythia) for enhanced toxin-resolving effects.

Promoting urination and draining Damp-Heat: Shi Da Gong Lao Ye has a traditional role in promoting urination to facilitate the drainage of Damp-Heat from the body. In patterns of Damp-Heat strangury (characterized by painful, difficult, or frequent urination with a burning sensation), Shi Da Gong Lao Ye can be combined with Che Qian Zi (Plantago seed) and Huang Bai (Phellodendron bark) to drain Damp-Heat through the urinary tract. This traditional use aligns with the herb's bitter, cold, and downward-directing properties.

Classical literature references: The use of Mahonia species in Chinese medicine has a long but somewhat informal history. While Mahonia bealei leaves are not prominently featured in the earliest classical texts such as the Shen Nong Ben Cao Jing, the related species Mahonia fortunei and Mahonia japonica have documented use in southern Chinese folk medicine and regional pharmacopoeias. The name "Shi Da Gong Lao Ye" (literally "Ten Great Merit Leaves") reflects the traditional reputation of this herb as a versatile remedy with multiple therapeutic applications. Modern TCM texts classify it as a bitter-cold herb for clearing Heat and drying Dampness, and it is included in several provincial standards for traditional Chinese materia medica.

Shi Da Gong Lao Ye contains a range of bioactive alkaloids and other compounds that have been the subject of pharmacological investigation. The following overview summarizes the major chemical constituents identified in the leaves of Mahonia bealei and what is currently known about them from published research.

Berberine: Berberine is a protoberberine isoquinoline alkaloid and the most abundant and well-characterized constituent of Shi Da Gong Lao Ye. It is a bright yellow compound responsible for the yellow color of the inner bark and roots of many Berberidaceae species. Berberine has been extensively studied for its antimicrobial activity against a wide range of bacteria, fungi, and protozoa. Pre-clinical research has also demonstrated anti-inflammatory effects through modulation of NF-kappaB and MAPK signaling pathways, as well as metabolic effects including improvement of insulin sensitivity and lipid profiles in animal models. Some clinical trials have investigated berberine for metabolic syndrome and type 2 diabetes. However, these studies have primarily used isolated berberine rather than whole-herb Shi Da Gong Lao Ye preparations.

Berbamine: Berbamine is a bis-benzylisoquinoline alkaloid that has been isolated from Mahonia species in significant quantities. Pre-clinical studies have investigated berbamine for its immunomodulatory effects, including the regulation of T-cell function and cytokine production. It has also been studied for potential anti-tumor activity through induction of apoptosis and inhibition of angiogenesis in cancer cell lines. Additionally, berbamine has demonstrated cardioprotective effects in animal models of ischemia-reperfusion injury. While these findings are promising, clinical evidence in humans remains very limited.

Jatrorrhizine: Jatrorrhizine is a protoberberine alkaloid closely related to berberine. It has been studied for its antimicrobial, anti-inflammatory, and potential hypoglycemic properties in pre-clinical research. Jatrorrhizine has demonstrated inhibitory activity against several bacterial and fungal pathogens, and animal studies suggest it may contribute to the regulation of glucose metabolism. Its contribution to the overall pharmacological profile of Shi Da Gong Lao Ye is considered synergistic with berberine.

Magnoflorine: Magnoflorine is an aporphine alkaloid found in Mahonia species and other members of the Ranunculales order. It has been studied for its anti-inflammatory and antioxidant effects in pre-clinical models. Research suggests that magnoflorine may modulate inflammatory responses by inhibiting the activation of NLRP3 inflammasome and reducing the production of pro-inflammatory cytokines. It has also shown potential anti-hyperglycemic and neuroprotective activities in laboratory studies.

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.

Shi Da Gong Lao Ye is a component in several classical and regional formulas in the TCM tradition. Below are three key formulas that feature Shi Da Gong Lao Ye as a component, along with their traditional indications and the role Shi Da Gong Lao Ye 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.

Antimicrobial activity of Mahonia alkaloids: The alkaloids isolated from Mahonia bealei leaves have been studied for their antimicrobial properties against various bacterial and fungal pathogens. Berberine, the primary alkaloid, has demonstrated broad-spectrum antibacterial activity through multiple mechanisms including disruption of cell membrane integrity, inhibition of DNA and protein synthesis, and induction of oxidative stress in microbial cells (PMID: 29191493). Research by Feng et al. (2019) investigated the antibacterial activity of berberine and jatrorrhizine from Mahonia species against drug-resistant bacterial strains and found synergistic effects when the two alkaloids were combined (PMID: 31557533). These findings provide mechanistic insights but their clinical relevance for human infections has not been established through rigorous clinical trials.

Anti-inflammatory and immunomodulatory effects: Berbamine, one of the characteristic bis-benzylisoquinoline alkaloids in Shi Da Gong Lao Ye, has been investigated for its immunomodulatory properties. Liu et al. (2020) demonstrated that berbamine attenuated inflammatory responses in LPS-induced macrophage models by suppressing NF-kappaB activation and reducing TNF-alpha, IL-1beta, and IL-6 production (PMID: 31740544). Magnoflorine has also shown anti-inflammatory potential through inhibition of the NLRP3 inflammasome pathway in animal models (PMID: 34031101). These pre-clinical studies suggest potential anti-inflammatory mechanisms but do not constitute evidence for clinical efficacy in human inflammatory conditions.

Metabolic and cardiovascular effects: Berberine has been the subject of considerable research interest for its metabolic effects. Multiple clinical trials have investigated berberine supplementation for type 2 diabetes, metabolic syndrome, and hyperlipidemia, with some studies reporting improvements in fasting glucose, HbA1c, and lipid profiles (PMID: 25851727). However, these studies used isolated, pharmaceutical-grade berberine at doses of 500–1500 mg per day, which is substantially higher than what would be achieved through standard decoctions of Shi Da Gong Lao Ye leaf. Wang et al. (2021) reviewed the cardiovascular effects of berberine and noted potential benefits for blood pressure, endothelial function, and arrhythmia management (PMID: 33592952). It is important to note that these studies investigated isolated berberine, not whole-herb Shi Da Gong Lao Ye preparations.

Antioxidant and hepatoprotective effects: Pre-clinical studies have investigated the antioxidant properties of Mahonia leaf extracts. Chen et al. (2022) evaluated the hepatoprotective effects of Mahonia bealei leaf extract in carbon tetrachloride-induced liver injury models in rats and found that the extract reduced hepatic oxidative stress markers and improved histopathological changes (PMID: 35484927). The antioxidant effects are attributed to the combined activity of berberine, jatrorrhizine, and magnoflorine. While these findings are mechanistically interesting, they are derived from animal models and should not be extrapolated to clinical applications in humans.

What the research does NOT show: Despite promising pre-clinical signals, the research on Shi Da Gong Lao Ye and its active compounds does NOT demonstrate conclusive clinical efficacy for any specific disease in humans when used as whole-herb preparations. While isolated berberine has been studied in some clinical trials for metabolic conditions, the whole-leaf preparation of Shi Da Gong Lao Ye has not been adequately evaluated in large-scale, randomized, placebo-controlled clinical trials. The translation from animal models to human clinical relevance is uncertain. This page does not endorse Shi Da Gong Lao Ye 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) or studies on isolated compounds. They do not constitute evidence of clinical efficacy in humans for whole-herb Shi Da Gong Lao Ye preparations. This section is provided for educational context and should not be used as a basis for treatment decisions.

General safety profile: Shi Da Gong Lao Ye is used in TCM practice, particularly in southern China, and is generally considered to have a moderate safety profile when used appropriately at standard doses in formula combinations. 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: In traditional TCM theory, Shi Da Gong Lao Ye is bitter and cold in nature. Individuals with Spleen-Stomach deficiency-cold — characterized by poor appetite, loose stools, abdominal coldness, and a pale tongue with white coating — should use Shi Da Gong Lao Ye with caution, as its bitter-cold nature may worsen digestive weakness. Prolonged use of bitter-cold herbs may damage the Spleen's transformative function, leading to further digestive complaints. This caution is based on traditional TCM theory.

Yin deficiency: Individuals with Yin deficiency — presenting with dry mouth, night sweats, a red tongue with little coating, and a thin, rapid pulse — should use Shi Da Gong Lao Ye with caution. Its bitter and drying properties may further damage Yin fluids, exacerbating the deficiency. In TCM theory, bitter herbs that dry Dampness can also dry normal body fluids when used excessively or inappropriately.

Pregnancy and lactation: Due to its bitter-cold nature and the presence of alkaloids, Shi Da Gong Lao Ye should be used with caution during pregnancy. High doses of berberine have been shown in pre-clinical studies to affect uterine contractility and may cross the placental barrier. Self-administration during pregnancy is not recommended. Shi Da Gong Lao Ye should only be used during pregnancy under the direct supervision of a qualified healthcare professional. The safety during lactation has not been adequately studied.

Drug interactions: Berberine and other alkaloids in Shi Da Gong Lao Ye may inhibit hepatic cytochrome P450 enzymes (particularly CYP3A4, CYP2D6, and CYP2C9) and P-glycoprotein, which could theoretically alter the metabolism and bioavailability of drugs processed through these pathways. Berberine may also have additive hypoglycemic effects when combined with antidiabetic medications, potentially increasing the risk of hypoglycemia. Clinical interaction data for whole-herb Shi Da Gong Lao Ye are very limited. Consult a qualified healthcare professional before combining Shi Da Gong Lao Ye with any prescription medications.

Gastrointestinal effects: High doses of Shi Da Gong Lao Ye may cause gastrointestinal discomfort, including nausea, abdominal cramping, and diarrhea, primarily due to the high berberine content. These effects are generally mild and reversible upon discontinuation. The herb's intensely bitter taste may also trigger nausea in sensitive individuals.

This platform provides educational information about traditional Chinese medicine herbs. It does not recommend, endorse, or prescribe the use of Shi Da Gong Lao Ye 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.