Herb Leaf (叶 yè)

Ku Ding Cha

Broadleaf Holly Leaf · 苦丁茶

Ilex kudingcha C.J. Tseng / Ilex latifolia Thunb. · Folium Ilicis Latifoliae

Also known as: Gao Lu Cha (皋卢茶), Fu Ding Cha (富丁茶), Jiao Ci Cha (角刺茶)

Ku Ding Cha (Broadleaf Holly Leaf) plant

Images shown are for educational purposes only

Ku Ding Cha is a traditional Chinese medicinal tea made from holly leaves, famous for its intensely bitter taste followed by a lingering sweetness. It is primarily used to clear excess Heat from the body, especially in the head and eyes, making it popular for headaches, red eyes, sore throat, and excessive thirst. Modern research also supports its use for managing high blood pressure, high cholesterol, and high blood sugar.

Category Heat-clearing herbs Cool, acrid herbs that release the Exterior (辛凉解表药)
Therapeutic focus Cardiovascular Health Eye Health and Vision Summer Heat Relief Blood Sugar Support Weight management

TCM Properties

Temperature

Cold

Taste

Bitter (苦 kǔ), Sweet (甘 gān)

Channels entered

Liver, Lungs, Stomach

Parts used

Leaf (叶 yè)

Educational content • Consult qualified TCM practitioners for diagnosis and treatment

What This Herb Does

Every herb has a specific set of actions — here's what Ku Ding Cha does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Ku Ding Cha is primarily used to support these areas of health:

Cardiovascular Health Eye Health and Vision Summer Heat Relief Blood Sugar Support Weight management

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Ku Ding Cha performs to restore balance in the body:

Disperses Wind-Heat Clears the Head and Brightens the Eyes Generates Fluids and Relieves Thirst Clears Heat and Resolves Toxicity Resolves Phlegm and Stops Cough

How these actions work

'Disperses Wind-Heat' means Ku Ding Cha helps the body expel the type of pathogenic influence that causes sudden-onset headache, sore throat, fever, and red eyes. When Wind-Heat invades from outside, it tends to attack the head and upper body first. The cold, bitter nature of this herb drives that pathogenic Heat outward and downward, relieving symptoms in the head and face. This is the herb's primary and most well-known action.

'Clears the head and brightens the eyes' describes how Ku Ding Cha specifically targets the head region, relieving headache, dizziness, red or irritated eyes, tinnitus, and toothache. The Liver channel opens to the eyes, and the Stomach channel traverses the face and gums. Because this herb enters both channels, its cooling action is directed precisely where these symptoms occur.

'Generates fluids and relieves thirst' refers to the herb's sweet undertone, which nourishes body fluids that have been damaged by Heat. Despite its intensely bitter first taste, Ku Ding Cha has a characteristic sweet aftertaste. This bitter-then-sweet quality makes it especially suitable for excessive thirst and dry mouth during feverish conditions, or for general Heat-related irritability and restlessness.

'Clears Heat and resolves toxin' means Ku Ding Cha can address inflammatory conditions such as mouth sores, sore throat, and dysentery. Its bitter, cold nature drains Heat from the Stomach and Liver, while its detoxifying action helps manage acute infections and inflammation in the digestive tract.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony. Ku Ding Cha is used to help correct these specific patterns.

Why Ku Ding Cha addresses this pattern

Ku Ding Cha is bitter, sweet, and cold, and enters the Liver, Lung, and Stomach channels. When external Wind-Heat invades the body, it tends to attack the upper body first, causing headache, fever, sore throat, and red eyes. The herb's cold nature directly counteracts the Heat component of this pathogen, while its bitter taste has a descending, dispersing action that helps drive Wind-Heat outward and downward. Its affinity for the Lung channel (which governs the body's exterior defense layer) makes it particularly effective at releasing this type of external pathogenic influence from the surface of the body.

A practitioner would look for one or more of these signs

Headaches

Headache with a sense of heat or distension

Sore Throat

Sore, red, swollen throat

Red Eyes

Red, burning, or irritated eyes

Fever

Mild fever with aversion to wind

Commonly Used For

These are conditions where Ku Ding Cha is frequently used — but only when they arise from the specific patterns it addresses, not in all cases

Arises from: Liver Fire Blazing

TCM Interpretation

TCM understands many cases of high blood pressure as a condition where Liver Yang or Liver Fire rises excessively upward. The Liver is responsible for the smooth flow of Qi throughout the body. When the Liver becomes overheated (from emotional stress, rich diet, or constitutional factors), this Fire flares upward to the head, producing symptoms that closely overlap with hypertension: throbbing headache, dizziness, facial flushing, red eyes, and irritability. The underlying mechanism is one of excess Heat rising in the Liver channel and disturbing the head.

Why Ku Ding Cha Helps

Ku Ding Cha enters the Liver channel directly and uses its cold, bitter nature to drain Liver Fire downward and out of the body. By clearing the upward-rushing Heat, it relieves the headache, dizziness, and facial flushing associated with high blood pressure. Modern pharmacological research has confirmed that it promotes blood circulation and has blood-pressure-lowering effects. Its bitter taste also has a descending action that counteracts the upward movement of excess Yang, helping to settle the rising tendency that drives the elevated pressure.

Also commonly used for

Headaches

Wind-Heat or Liver Fire type headaches

Pharyngitis

Acute or chronic sore throat

Toothache

Gum inflammation and dental pain from Heat

Tinnitus

Ringing in the ears with Heat signs

Dysentery

Damp-Heat type diarrhea or dysentery

Sore

Oral ulcers from Stomach Fire

Diabetes

As an adjunct for thirst and blood sugar management

Herb Properties

Every herb has an inherent temperature, taste, and affinity for specific channels — these properties determine how it interacts with the body

Temperature

Cold

Taste

Bitter (苦 kǔ), Sweet (甘 gān)

Channels Entered

Liver Lungs Stomach

Parts Used

Leaf (叶 yè)

Dosage & Preparation

These are general dosage guidelines for Ku Ding Cha — always follow your practitioner's recommendation, as dosages vary based on the formula and your individual condition

Standard dosage

3-9g

Maximum dosage

Up to 15g in decoction for short-term use in acute Heat conditions, under practitioner supervision. Do not exceed standard doses for daily beverage use.

Dosage notes

As a daily health beverage (tea infusion), use only 3-5g of the dried leaf spikes, steeped in hot water and re-infused multiple times throughout the day. For medicinal decoction to clear Heat, relieve headache, or treat dysentery, the full dosage range of 3-9g is appropriate. Due to its intensely cold nature, lower doses are preferred and it should not be taken continuously for extended periods. People with any tendency toward cold or weak digestion should use the lower end of the dosage range and may benefit from combining it with warming herbs such as Hong Zao (red dates) or Gui Yuan (longan) to moderate its coldness.

Preparation

Ku Ding Cha is most commonly used as a tea infusion rather than a traditional decoction. For tea preparation, 3-5 dried leaf spikes are steeped in water around 90°C. The first steep can be discarded as a rinse, then re-infused 3-5 times. For decoction in combination with other herbs, no special handling is required; it can be decocted normally with other ingredients.

Common Herb Pairs

These ingredients are traditionally combined with Ku Ding Cha for enhanced therapeutic effect

Ju Hua
Ju Hua 1:1

Ku Ding Cha and Ju Hua (Chrysanthemum) together powerfully clear Wind-Heat from the head region and brighten the eyes. Ku Ding Cha brings strong bitter-cold Heat-clearing force, while Ju Hua adds a lighter, more gentle dispersing quality with specific affinity for the Liver and eye region. Together they address headache and eye symptoms more comprehensively than either herb alone.

When to use: Wind-Heat headache with red, irritated eyes, or Liver Fire causing blurred vision and eye pain.

Shi Gao
Shi Gao Shi Gao 15-30g : Ku Ding Cha 3-9g

Ku Ding Cha and Shi Gao (Gypsum) together create a powerful Heat-clearing combination. Shi Gao is one of the strongest herbs for clearing Qi-level Heat and draining Stomach Fire, while Ku Ding Cha disperses Wind-Heat from the surface and clears the head region. Combined, they address both deep-seated Stomach Heat and superficial Wind-Heat simultaneously.

When to use: High fever with intense thirst, headache, toothache, and irritability from both external Wind-Heat and internal Stomach Fire.

Lu Gen
Lu Gen 1:3 (Lu Gen in larger proportion)

Ku Ding Cha and Lu Gen (Reed Rhizome) together nourish Yin, generate fluids, and relieve thirst. Ku Ding Cha clears Heat with its bitter cold nature, while Lu Gen adds a sweet, cold quality that specifically generates fluids and promotes urination. The combination is stronger at addressing the thirst and fluid depletion caused by Heat conditions.

When to use: Feverish conditions with damaged fluids, intense thirst, dry mouth, and irritability.

Huang Lian
Huang Lian 1:1

Ku Ding Cha and Huang Lian (Coptis) together clear Heat from both the exterior and interior simultaneously. Huang Lian is one of the coldest, most bitter herbs for draining Heat and drying Dampness from the middle burner, while Ku Ding Cha addresses the exterior Wind-Heat component. Together they manage Heat-related diarrhea and dysentery more effectively.

When to use: Damp-Heat dysentery or diarrhea with concurrent exterior Wind-Heat symptoms, or severe Stomach Heat causing both digestive and head symptoms.

Comparable Ingredients

These ingredients have overlapping uses — here's how to tell them apart

Bo He
Ku Ding Cha vs Bo He

Both Ku Ding Cha and Bo He (Mint) disperse Wind-Heat from the head and eyes. However, Bo He is acrid and cool with a lighter, more aromatic dispersing quality suited for the early stages of exterior Wind-Heat invasion, while Ku Ding Cha is bitter and fully cold, making it more appropriate when there is significant Heat accumulation with intense thirst, red eyes, and headache. Ku Ding Cha also has a stronger fluid-generating action and modern applications for cardiovascular health that Bo He lacks.

Jue Ming Zi
Ku Ding Cha vs Jue Ming Zi

Both clear Liver Heat and brighten the eyes. Jue Ming Zi (Cassia Seed) focuses more on the Liver and Large Intestine, adding a moistening laxative effect for constipation with Liver Heat. Ku Ding Cha has broader exterior-dispersing action for Wind-Heat and stronger fluid-generating properties for thirst. Jue Ming Zi is preferred when eye problems come with constipation, while Ku Ding Cha is better for acute Wind-Heat symptoms with headache and intense thirst.

Sang Ye
Ku Ding Cha vs Sang Ye

Both disperse Wind-Heat and clear the Liver to brighten the eyes. Sang Ye (Mulberry Leaf) is sweet, bitter, and cold, entering the Lung and Liver. It has a gentler quality and also moistens the Lungs for dry cough. Ku Ding Cha is more intensely bitter and cold, making it stronger for clearing substantial Heat and generating fluids during feverish thirst, but too harsh for patients with underlying Spleen-Stomach weakness. Sang Ye is the safer choice for longer-term or milder use.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Ku Ding Cha

Ku Ding Cha has a notably complex botanical identity. The most common substitution involves 'small-leaved Ku Ding Cha' from Ligustrum robustum (family Oleaceae), which is particularly prevalent in Sichuan and Guizhou provinces. While this plant has some overlapping traditional uses, it differs significantly in chemical composition (lacking the characteristic Ilex triterpenoid saponins) and has a milder, less bitter flavor. In Jiangsu and Anhui, a product made by mixing regular tea leaves with juice from Ilex cornuta (Gou Gu, Chinese Holly with spiny leaves) has been sold as Ku Ding Cha. In Sichuan, leaves from Ligustrum pedunculare (序梗女贞) are sometimes used, and in Guizhou, leaves from Ligustrum japonicum var. pubescens have been substituted. Altogether, nearly 20 different plant species from several families have been marketed as 'Ku Ding Cha' in different regions. Authentic large-leaved Ku Ding Cha from Ilex kudingcha can be distinguished by its larger, thicker, rubbery leaves without spines, its intensely bitter taste with a pronounced sweet aftertaste, and its purplish-brown leaf base when brewed.

Educational content — always consult a qualified healthcare provider or TCM practitioner before using any herb.

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Ku Ding Cha

Non-toxic

Ku Ding Cha is classified as non-toxic in the classical literature and the Chinese Pharmacopoeia. At standard doses, it has no known toxic components. However, in very concentrated preparations, it may act as a laxative or induce nausea, which reflects its strongly bitter-cold nature rather than true toxicity. Prolonged excessive consumption has been cautioned against in some sources as potentially harmful to Liver and Kidney function, though this is based on traditional reasoning about the effects of sustained bitter-cold substances rather than documented toxic reactions. At normal usage levels as a tea or at standard medicinal dosage (3-9g), it is considered safe for most people.

Contraindications

Situations where Ku Ding Cha should not be used or requires extra caution

Avoid

Pregnancy. Classical texts note Ku Ding Cha can 'cause cessation of pregnancy' (绝孕) according to the Ben Cao Gang Mu Shi Yi, and 'cool the uterus' (凉子宫) according to the Zhongguo Yixue Da Cidian. Its strongly cold nature may harm the developing fetus and impair uterine function.

Caution

Cold-deficiency constitution (虚寒体质). People who feel cold easily, have cold hands and feet, and rarely experience Heat signs. The strongly cold nature of Ku Ding Cha will worsen coldness and may cause abdominal pain and diarrhea.

Caution

Wind-Cold type common cold. During the early stages of a cold caused by Wind-Cold (with chills, runny nose with clear discharge, no sore throat), Ku Ding Cha's cold nature obstructs the dispersal of the external pathogen and may delay recovery.

Caution

Chronic gastritis, peptic ulcer, or ulcerative colitis with underlying Spleen-Stomach deficiency Cold. The bitter-cold nature can further injure the digestive system and worsen symptoms of loose stools, poor appetite, and abdominal pain.

Caution

Menstruation, especially in women prone to painful periods. The cold nature can cause Qi and Blood to congeal, impairing menstrual flow and potentially worsening menstrual cramps or causing irregular periods.

Caution

Postpartum recovery period. New mothers typically have a weakened, Blood-deficient constitution. The cold nature of Ku Ding Cha can injure the Spleen and Stomach and hinder recovery of the uterus.

Caution

Long-term continuous use without supervision. As a medicinal substance rather than an ordinary tea, prolonged daily use may potentially impair Liver and Kidney function over time. Intermittent use is preferred.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated during pregnancy. The Ben Cao Gang Mu Shi Yi explicitly states that Ku Ding Cha can cause 'cessation of pregnancy' (绝孕), and the Zhongguo Yixue Da Cidian notes it 'cools the uterus' (凉子宫). Its strongly cold nature, combined with its traditional Blood-invigorating properties, poses a risk of uterine stimulation and could potentially threaten fetal development. Women who are pregnant or planning to become pregnant should avoid Ku Ding Cha entirely.

Breastfeeding

Generally not recommended during breastfeeding. Although there is no specific research on the transfer of Ku Ding Cha compounds into breast milk, its strongly cold and bitter nature could theoretically affect the nursing infant's immature digestive system through breast milk, potentially causing loose stools or colic. New mothers are also typically in a Blood-deficient, recovery state, and the cold nature of Ku Ding Cha could impair postpartum recovery and harm Spleen function, potentially reducing milk production. If a breastfeeding mother wishes to use it occasionally for acute Heat symptoms, she should do so under practitioner guidance and at a reduced dose.

Children

Not recommended for infants and very young children. The Spleen and Stomach functions in young children are still immature and developing, and the strongly cold and bitter nature of Ku Ding Cha can easily injure digestive function, leading to poor appetite, nausea, or diarrhea. For older children (roughly over 6 years) with clear Heat signs such as mouth sores, sore throat, or red eyes, a very small amount (1-2g) may be used briefly under practitioner supervision, but routine or prolonged use should be avoided.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Ku Ding Cha

No well-documented pharmacological drug interactions have been established for Ku Ding Cha in peer-reviewed literature. However, based on its known pharmacological properties, the following theoretical considerations apply:

  • Antihypertensive medications: Ku Ding Cha has demonstrated blood-pressure-lowering effects in some studies. Concurrent use with antihypertensive drugs could theoretically lead to additive hypotensive effects. Blood pressure should be monitored.
  • Lipid-lowering drugs (statins, fibrates): Research shows Ku Ding Cha's saponins can reduce total cholesterol and LDL-C through mechanisms that may overlap with statins (e.g., HMGCR regulation). Additive lipid-lowering effects are theoretically possible.
  • Hypoglycemic agents: Preclinical studies suggest blood-glucose-lowering activity. People taking insulin or oral hypoglycemics should be aware of the possibility of enhanced blood sugar reduction.
  • Anticoagulant/antiplatelet drugs: Classical texts describe Ku Ding Cha as able to 'invigorate the Blood vessels' (活血脉). While this is a mild effect, caution is advisable in combination with warfarin or other anticoagulants.

Dietary Advice

Foods and dietary considerations when taking Ku Ding Cha

During use, avoid excessive cold and raw foods (such as ice cream, raw salads, and chilled drinks), as these combined with the already cold nature of the herb can further injure the Spleen and Stomach. Rich, greasy, and heavy foods are not specifically restricted since Ku Ding Cha is traditionally said to 'cut through greasiness' (去油腻), but a balanced, easily digestible diet supports its therapeutic effects. People with weak digestion may pair it with warm foods like ginger tea, red dates, or longan to offset its coldness.

Botanical Description

Physical characteristics and morphology of the Ku Ding Cha source plant

Ku Ding Cha primarily comes from Ilex kudingcha C.J. Tseng and Ilex latifolia Thunb., both evergreen trees in the holly family (Aquifoliaceae). Ilex kudingcha grows as a large evergreen tree reaching 10-20 meters in height, commonly found in mountain valleys and along streams in mixed forests at elevations of 400-800 meters. The leaves are long, narrow, and somewhat rubbery in texture, lacking the spiny points seen on many other holly species. They are thick, leathery, and dark green with a glossy upper surface.

The tree thrives in warm, humid subtropical environments with deep, fertile, well-drained sandy loam soils (pH 5.5-6.5). It prefers areas with annual rainfall above 1500mm and relative humidity above 80%. Young trees tolerate shade well, while mature trees prefer full sun. The root system is well developed, making the tree relatively drought-resistant once established. A separate group of plants called "small-leaved Ku Ding Cha" comes from Ligustrum robustum (family Oleaceae), which are smaller shrubs or trees with thinner, smaller leaves and a milder bitter flavor.

Sourcing & Harvesting

Where Ku Ding Cha is sourced, when it's harvested or collected, and how to assess quality

Harvesting season

Around Qingming Festival (early April), when tender young leaves are picked. First-flush leaves are gathered more abundantly, with later pickings taken more sparingly.

Primary growing regions

The large-leaved Ku Ding Cha (Ilex kudingcha) is primarily produced in Hainan, Guangxi, Fujian, Guizhou, and Guangdong provinces of southern China. The most prized variety comes from Wuzhishan in Hainan province. Guangxi province (particularly the Daxin area) is another famous production region, with ancient Ku Ding Cha trees still standing. Sichuan, Chongqing, Hunan, Hubei, Jiangxi, and Yunnan also produce the herb. The small-leaved variety (Ligustrum robustum) is mainly from Guizhou province, particularly Yuqing county, where it has been cultivated by the Tujia and Miao ethnic groups for centuries. Northern Vietnam also produces Ilex kudingcha.

Quality indicators

Good quality large-leaved Ku Ding Cha (from Ilex kudingcha) should have leaves that are thick, leathery, and dark green with a glossy surface. When dried and twisted into 'spikes' or 'nails,' the pieces should be tightly rolled, uniform in color (dark greenish-brown to blackish-green), and intact without excessive breakage. When brewed, high-quality leaves unfurl into large, intact pieces that are elliptical with smooth edges. The infusion should be clear and greenish. The taste should be distinctly bitter at first but quickly followed by a pleasant, lasting sweet aftertaste (回甘). If the sweetness does not follow the bitterness, or if the tea tastes flat, astringent, or musty, the quality is poor. Avoid product that smells moldy or stale. The leaf base (叶底) of authentic Ilex Ku Ding Cha should show a purplish-brown tinge, no fuzz, large thick leaves, and stout stems.

Classical Texts

Key passages from the classical Chinese medical texts that describe Ku Ding Cha and its therapeutic uses

Ben Cao Gang Mu (本草纲目) — Li Shizhen, Ming Dynasty

Original: 苦、平、无毒。南人取作茗，极重之……煮饮，止渴明目除烦，令人不睡，消痰利水，通小肠，治淋，止头痛烦热，噙咽，清上膈。

Translation: Bitter, neutral, non-toxic. Southerners harvest it to make tea and value it greatly. Boiled and drunk, it quenches thirst, brightens the eyes, eliminates vexation, prevents drowsiness, resolves phlegm, promotes urination, frees the small intestine, treats stranguria, stops headache and vexing heat, soothes the throat, and clears the upper diaphragm.

Ben Cao Gang Mu Shi Yi (本草纲目拾遗) — Zhao Xuemin, Qing Dynasty

Original: 逐风、活血，绝孕。

Translation: Expels Wind, invigorates Blood, and causes cessation of pregnancy.

Ben Cao Zai Xin (本草再新)

Original: 消食化痰，除烦止渴，利二便，去油腻。

Translation: Promotes digestion, transforms phlegm, eliminates vexation and quenches thirst, benefits both urination and defecation, and cuts through greasiness.

Zhongguo Yixue Da Cidian (中国医学大辞典)

Original: 散肝风，清头目，治耳鸣、耳聋、聤耳流脓，活血脉，凉子宫。

Translation: Disperses Liver Wind, clears the head and eyes, treats tinnitus, deafness, and ear discharge with pus, invigorates the Blood vessels, and cools the uterus.

Si Chuan Zhong Yao Zhi (四川中药志)

Original: 能清热散风，除烦解渴。治头痛、齿痛、耳鸣、目赤及食滞有痰。

Translation: Clears Heat and disperses Wind, eliminates vexation and relieves thirst. Treats headache, toothache, tinnitus, red eyes, food stagnation, and phlegm.

Historical Context

The history and evolution of Ku Ding Cha's use in Chinese medicine over the centuries

Ku Ding Cha has a documented history of use spanning approximately 2,000 years in China. The earliest known written reference appears in the Eastern Han dynasty text Tong Jun Lu (桐君录), which describes a plant from the south called "Gua Lu Mu" (瓜卢木) that resembles tea but is extremely bitter, and that when brewed and drunk, keeps one awake through the night. The Tang dynasty pharmacist Chen Cangqi also recorded it in the Ben Cao Shi Yi (本草拾遗) under the name "Gao Lu" (皋卢).

The name "Dong Qing" (冬青, meaning "winter green") was an earlier name reflecting the tree's evergreen nature. The modern name Ku Ding Cha is descriptive: "Ku" (苦) means bitter, and "Ding" (丁) refers to the spike-like shape of the dried, twisted leaf rolls. According to historical accounts, the Ming dynasty emperor Zhu Yuanzhang suffered from a chronic intestinal condition, and after imperial physicians failed to provide relief, a folk doctor from the Lingnan region presented Ku Ding Cha as a tribute cure. The emperor reportedly recovered, and Ku Ding Cha was thereafter designated a tribute tea (贡茶), sparking its popularity among court officials.

Li Shizhen described the herb extensively in the Ben Cao Gang Mu, and it was later supplemented by Zhao Xuemin in the Ben Cao Gang Mu Shi Yi (1765). In the Guizhou region, Ku Ding Cha from the Tujia and Miao ethnic minorities was recognized as one of four famous ancient local tea varieties. Today it is widely consumed throughout China as both a health beverage and a medicinal tea.

Modern Research

5 published studies investigating the pharmacological effects or clinical outcomes of Ku Ding Cha

1

Lipid-Lowering Efficacy of Kuding Tea in Patients With Metabolic Disorders: A Systematic Review and Meta-Analysis of Randomized Controlled Trials (2022)

Jiang Z, Lu Z, Wang T, Wang Y, Chu J, Chen K, Gao Z. Frontiers in Nutrition, 2022, 9:802687.

This systematic review and meta-analysis searched eight electronic databases for randomized controlled trials on Kuding tea's effects on blood lipids in patients with metabolic disorders. The analysis found that Kuding tea supplementation can effectively improve lipid profiles and is a promising approach to reduce blood lipid levels in these patients.

DOI
2

Extract of Kuding Tea Prevents High-Fat Diet-Induced Metabolic Disorders in C57BL/6 Mice via Liver X Receptor (LXR) β Antagonism (2012, preclinical animal study)

Fan S, Zhang Y, Hu N, Sun Q, Ding X, Li G, Zheng B, Gu M, Huang F, Sun YQ, et al. PLoS ONE, 2012, 7:e51007.

This preclinical study found that ethanol extract of Kuding tea prevented metabolic disorders induced by a high-fat diet in mice. The extract reduced body weight gain and improved glucose tolerance and lipid profiles, acting through antagonism of the LXR-beta nuclear receptor, a key regulator of lipid metabolism.

DOI
3

Chemical Composition, Bioactivity and Safety Aspects of Kuding Tea — From Beverage to Herbal Extract (2020, review)

Wüpper S, Lüersen K, Rimbach G. Nutrients, 2020, 12(9):2796.

This comprehensive review summarized research on the chemical composition and biological activities of large-leaved Kuding tea. It identified triterpene saponins and polyphenols as the major bioactive components and reviewed evidence for lipid-lowering, weight-reducing, blood-glucose-lowering, antioxidant, anti-inflammatory, and hepatoprotective effects.

PubMed
4

The Large-Leaved Kudingcha (Ilex latifolia Thunb and Ilex kudingcha C.J. Tseng): A Traditional Chinese Tea with Plentiful Secondary Metabolites and Potential Biological Activities (2013, review)

Li L, Xu LJ, Ma GZ, Dong YM, Peng Y, Xiao PG. Journal of Natural Medicines, 2013, 67:425-437.

This review covered the plant characteristics, ethnobotanical uses, chemical constituents, and biological activities of large-leaved Kuding tea. The main metabolites identified were triterpenoids, phenolic acids, flavonoids, and essential oils, with demonstrated vascular-protective, lipid-regulating, antioxidant, hypoglycemic, and anti-tumor effects.

DOI
5

Antidiabetic Effect of an Active Components Group from Ilex kudingcha and Its Chemical Composition (2012, preclinical animal study)

Thuong PT, et al. Evidence-Based Complementary and Alternative Medicine, 2012, Article ID 930256.

This study investigated the antidiabetic effects of an active component group extracted from Ilex kudingcha in alloxan-induced diabetic mice. The extract significantly reduced elevated blood glucose and lipid levels, upregulated glucokinase, and downregulated glucose-6-phosphatase. Six major active components were identified, including three dicaffeoylquinic acids and three novel triterpenoid saponins.

PubMed

Research on individual TCM herbs is growing but still limited by Western clinical trial standards. These studies provide emerging evidence and should be considered alongside practitioner expertise.