Herb

Qian Li Guang

Climbing groundsel herb | 千里光

Also known as:

Ragwort , Senecio

Qian Li Guang

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Properties

Heat-clearing herbs · Cold

Traditionally supports*

Eye Health and Vision Skin Health Gut Infections Immune Support

Parts Used

Whole plant / Aerial parts (全草 quán cǎo)

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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About This Herb

Traditional Chinese Medicine background and properties

Herb Description

Qiān Lǐ Guāng is a cooling herb best known for its ability to fight infections and clear inflammation. It is widely used for eye redness and irritation, skin conditions like eczema and boils, and acute digestive infections such as dysentery. It is commonly used both internally as a tea or decoction and externally as a skin wash. Note: this herb contains pyrrolizidine alkaloids and should only be used under professional guidance, not taken long-term.

Herb Category

Heat-clearing herbs Herbs that clear Heat and resolve Toxicity (清热解毒药)

Main Actions

  • Clears Heat and Resolves Toxicity
  • Clears Liver Heat and Brightens the Eyes
  • Drains Dampness
  • Kills Parasites and Stops Itching

How These Actions Work

'Clears Heat and resolves toxins' means Qiān Lǐ Guāng has a strong ability to cool and counteract infections and inflammatory conditions caused by toxic Heat. This is its primary action, and it is used for skin abscesses, boils, carbuncles, sore throat, and acute inflammatory diseases. It can be taken internally as a decoction or applied externally as a wash or poultice for skin lesions, burns, and ulcers. It is commonly paired with Jīn Yín Huā (honeysuckle), Yě Jú Huā (wild chrysanthemum), or Pú Gōng Yīng (dandelion) for this purpose.

'Clears the Liver and brightens the eyes' refers to this herb's notable ability to clear Heat from the Liver channel and treat eye conditions. Because the Liver "opens to the eyes" in TCM theory, Heat or Fire in the Liver channel often manifests as red, swollen, painful eyes. Qiān Lǐ Guāng enters the Liver channel and is particularly effective for these conditions. It has a long history of use as an eye wash for conjunctivitis and red, itchy eyes, and can be combined with herbs like Xià Kū Cǎo (prunella) or Jué Míng Zǐ (cassia seed).

'Drains Dampness' means Qiān Lǐ Guāng can clear Damp-Heat from the intestines, making it useful for diarrhea and dysentery with abdominal pain, especially bacterial dysentery. Its bitter, cold nature dries Dampness and clears Heat simultaneously. 'Kills parasites and stops itching' describes its topical use for skin conditions caused by Damp-Heat and parasites, including eczema, fungal infections (ringworm, athlete's foot), scrotal itching, and scabies. It is typically decocted into a concentrated wash or made into a paste for external application.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Qian Li Guang is traditionally associated with these specific patterns.

The following describes this herb's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.

Why Qian Li Guang addresses this pattern

Qiān Lǐ Guāng is bitter and cold, entering the Lung and Liver channels, giving it strong Heat-clearing and toxin-resolving capacity. When toxic Heat accumulates in the body, it produces abscesses, boils, sore throat, and acute infections. The herb's bitter taste drives this pathogenic Heat downward and out, while its cold nature directly counteracts the Heat. This makes it a frontline herb for toxic Heat patterns affecting the skin, throat, and intestines.

A practitioner would look for one or more of these signs

Skin Abscess

Boils, carbuncles, and skin infections with redness, swelling, and pus

Sore Throat

Swollen, painful throat from Heat toxin

Ulcer

Non-healing skin ulcers or burns with infection

TCM Properties

Temperature

Cold

Taste

Bitter (苦 kǔ)

Channels Entered
Lungs Liver Large Intestine
Parts Used

Whole plant / Aerial parts (全草 quán cǎo)

This is partial information on the herb's TCM properties. More detailed information is available on the herb's dedicated page

Product Details

Manufacturing, supplier, and product specifications

Product Type

Granules

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Botanical & Sourcing

Quality Indicators

Good quality Qian Li Guang should have stems that are greyish-green to yellowish-brown with visible longitudinal ridges and a covering of fine greyish-white hairs. Leaves should be present (though often crumpled or broken), and when flattened should show the characteristic ovate-lanceolate or triangular shape with an arrow-shaped or truncate base and irregularly toothed edges. Occasional yellow to brown flower heads at branch tips and white pappus on mature fruits are desirable indicators of proper harvest timing. The cross-section of the stem should show a well-developed white pith. The herb should have a faint, slightly aromatic smell and a distinctly bitter taste. Avoid material that is heavily blackened, mouldy, or devoid of leaves and flowers. The Chinese Pharmacopoeia specifies that hyperoside (jin si tao gan, a flavonoid glycoside) content should not be less than 0.030% on a dry basis, and moisture content should not exceed 14.0%.

Primary Growing Regions

Widely distributed across eastern, central, and southwestern China, including Jiangsu, Zhejiang, Anhui, Jiangxi, Hunan, Hubei, Sichuan, Guizhou, Yunnan, Guangdong, Guangxi, Shaanxi, and Tibet. Major production areas include Jiangsu, Zhejiang, Guangxi, and Sichuan provinces. The plant also grows across South and Southeast Asia, including India, Nepal, Bhutan, Myanmar, Thailand, the Philippines, and Japan. There is no single well-defined dao di (terroir) region, as the plant grows abundantly in many areas. Herb from Guangxi and Sichuan is commonly traded.

Harvesting Season

Summer to autumn (primarily September to October), when the stems and leaves are lush and flowers are about to open. Can be harvested year-round in some regions.

Supplier Information

Treasure of the East

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Miscellaneous Info

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Usage & Safety

How to use this herb and important safety information

Important Medical Disclaimer

The information provided here is for educational purposes only and is not intended as medical advice or to replace consultation with a qualified healthcare professional. This herb is a dietary supplement and has not been evaluated by the FDA. It is not intended to diagnose, treat, cure, or prevent any disease.

Always consult with a qualified healthcare provider, particularly if you are pregnant, nursing, have a medical condition, or are taking other medications. Discontinue use and consult your healthcare provider if you experience any adverse reactions.

Recommended Dosage

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Instructions for safe storage and consumption

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Traditional Dosage Reference

Standard

15-30g

Maximum

30g per day in decoction for short-term use. Do not exceed the standard range or use long-term due to cumulative pyrrolizidine alkaloid exposure risk.

Notes

The standard internal dose is 15-30g of dried herb in decoction. When using the fresh herb, doses up to 30-50g may be employed. For external use (skin washes for eczema, wound care), there is no strict upper limit; an appropriate amount is decocted in water for washing or compressing. Lower doses (9-15g) are sometimes used in combination formulas for wind-heat colds or eye conditions. Higher doses within the standard range (up to 30g) are used for acute infections such as bacterial dysentery or urinary tract infections. Due to its intensely bitter taste, larger doses may cause nausea, reduced appetite, or loose stools. To mitigate gastrointestinal discomfort, the herb can be combined with Qi-harmonizing herbs. Internal use should be kept to short courses (typically 7-14 days) to minimize cumulative pyrrolizidine alkaloid exposure.

Toxicity Classification

Slightly toxic

Qian Li Guang contains pyrrolizidine alkaloids (PAs), which are the primary toxic concern. The characteristic PA in Senecio scandens is adonifoline, along with smaller amounts of senecionine, seneciphylline, senkirkine, and their N-oxides. PAs are metabolically activated in the liver by cytochrome P450 enzymes (especially CYP3A4), producing reactive intermediates that can bind to DNA and proteins, potentially causing hepatic sinusoidal obstruction disease (veno-occlusive disease), liver necrosis, and in severe or chronic exposure, liver fibrosis or cirrhosis. Importantly, the total PA content of S. scandens (approximately 7 micrograms per gram of herb) is relatively low. At the standard dosage recommended by the Chinese Pharmacopoeia (15-30g), the daily PA intake has been calculated at approximately 3.48 micrograms per kilogram body weight, which is well below the 15 micrograms per kilogram per day threshold for hepatotoxicity set by the International Programme on Chemical Safety. However, the PA content can vary significantly depending on geographic origin. A 90-day subchronic study in rats at the Pharmacopoeia-equivalent dose showed no major organ toxicity, but doses 8-fold higher than standard caused typical PA-induced hepatotoxicity. Common mild side effects at normal doses include nausea, reduced appetite, and increased bowel movements in some individuals. Rare allergic skin rashes have been reported. To minimize risk, this herb should only be taken at standard dosages for short courses, and should not be used long-term.

Contraindications

Avoid

Pre-existing liver disease or impaired liver function. Qian Li Guang contains pyrrolizidine alkaloids (PAs) that are metabolized by the liver and can cause hepatotoxicity, particularly in individuals with compromised liver function.

Avoid

Pregnancy. Animal studies have demonstrated that Senecio scandens water extract, total alkaloids, and preparations containing this herb can cause skeletal deformities in rat fetuses when administered during the teratogenic sensitive period.

Caution

Spleen and Stomach deficiency with cold (中寒泄泻). This herb is bitter and cold in nature, which can further injure a weakened and cold digestive system, worsening diarrhea and appetite loss.

Caution

Prolonged internal use. Due to the presence of pyrrolizidine alkaloids (PAs), long-term oral administration should be avoided. Use should be limited to short courses at standard dosages under practitioner supervision.

Caution

Concurrent use of other hepatotoxic drugs or herbs. Co-administration with substances that stress the liver may compound the risk of liver damage from pyrrolizidine alkaloids.

Caution

Allergy to plants in the Asteraceae (Compositae) family. Individuals with known ragweed or daisy-family allergies may experience allergic reactions including skin rashes.

Special Populations

Pregnancy

Contraindicated. Animal studies have demonstrated clear embryotoxicity: when pregnant rats were given Senecio scandens water extract, total alkaloids, or Qianbai Biyanpian (a formula containing the herb) during the teratogenic sensitive period, significant fetal skeletal deformities were observed, including fontanel enlargement, underdeveloped parietal and occipital bones, cervical arch defects, and rib abnormalities. The percentage of skeletal deformities with total alkaloids reached up to 80%. Pyrrolizidine alkaloids are known to cross the placental barrier. Additionally, related Senecio species have been shown to cause uterine contraction in animal models. Qian Li Guang and all products containing it should be strictly avoided during pregnancy.

Breastfeeding

Avoid use during breastfeeding. Pyrrolizidine alkaloids and their metabolites are known to pass into breast milk in related Senecio species and other PA-containing plants. Infants, particularly neonates, are highly susceptible to PA toxicity due to their immature liver enzyme systems and higher relative liver copper levels. There are no clinical safety studies on Qian Li Guang use during lactation specifically, but the precautionary principle strongly applies given the known PA content. External use (topical wash) for maternal skin conditions may be considered with caution, but internal use should be avoided.

Pediatric Use

Use with significant caution in children. Dosage should be proportionally reduced based on age and body weight, typically to one-third to one-half of the adult dose. Children's immature liver metabolism makes them more vulnerable to pyrrolizidine alkaloid toxicity. Internal use should be limited to short courses under practitioner supervision. External use (decoction wash for eczema, skin infections) is generally safer and more commonly employed in pediatric practice. Avoid use in infants and very young children (under 3 years) entirely.

Drug Interactions

Hepatotoxic medications: Qian Li Guang should not be combined with drugs known to be hepatotoxic (e.g. acetaminophen/paracetamol at high doses, methotrexate, certain statins, isoniazid) due to the additive risk of liver damage from pyrrolizidine alkaloids.

Drugs metabolized by CYP3A4: Pyrrolizidine alkaloids in Qian Li Guang are activated by cytochrome P450 3A4 enzymes. Drugs that inhibit CYP3A4 (e.g. ketoconazole, itraconazole, erythromycin, grapefruit juice) could theoretically reduce the metabolic activation of PAs, but the clinical significance is unclear. Conversely, CYP3A4 inducers (e.g. rifampicin, carbamazepine, phenytoin) may increase the rate of PA activation and potentially increase hepatotoxic risk.

Cardiac glycosides (digoxin): Alkaloids from Senecio species have been found to have digitalis-like (cardiotonic) effects in animal studies. Concurrent use with digoxin or other cardiac glycosides could theoretically potentiate cardiac effects and should be avoided.

Anticoagulants/antiplatelets: No direct interaction is well-documented, but liver damage from PAs could impair coagulation factor synthesis, potentially complicating anticoagulant therapy.

Dietary Advice

When taking Qian Li Guang internally, avoid alcohol and greasy, rich foods, as these place additional stress on the liver. Since the herb is cold and bitter, also avoid excessive cold and raw foods to protect the Spleen and Stomach from further cold damage. Supportive foods that gently nourish the Spleen (such as congee, cooked grains, and lightly cooked vegetables) are appropriate during a course of treatment.

Cautions & Warnings

Although this formula is typically safe for most individuals, it may cause side effects in some people. Pregnant women, nursing mothers, postpartum women, and those with liver disease should use the formula with caution.

As with any Chinese herbal remedy, it is advisable to seek guidance from a qualified TCM practitioner before beginning treatment.