Herb

Tian ji Huang

Japanese St. John's Wort | 田基黄

Also known as:

Di Er Cao (地耳草)

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*

Tian Ji Huang is a small herb widely used in southern Chinese folk medicine, valued primarily for its ability to clear Dampness and Heat from the liver and gallbladder. It is best known as a treatment for jaundice and hepatitis, and is also applied externally for boils, snakebites, and traumatic injuries. Its cool, bitter nature makes it unsuitable for long-term use in people with cold or weak digestion.

Herb Category*

Main Actions*

  • Clears Heat and Drains Dampness
  • Clears Heat and Resolves Toxicity
  • Promotes bile flow and relieves jaundice
  • Invigorates Blood and Reduces Swelling
  • Promotes Urination

How These Actions Work*

'Clears Heat and resolves Dampness' means this herb drains accumulated Heat and Dampness from the body, particularly from the Liver, Gallbladder, and Stomach. This is why it is best known for treating Damp-Heat jaundice (yellow skin and eyes), diarrhea, and dysentery. Its cool nature and bitter taste give it the ability to dry Dampness and direct pathogenic Heat downward and out of the body.

'Clears Heat and resolves toxins' refers to its ability to counteract toxic Heat conditions such as boils, abscesses, sore throat (tonsillitis), mouth ulcers, red swollen eyes, and snakebite. The herb can be taken internally as a decoction or applied externally as a fresh poultice on infected or inflamed skin.

'Promotes bile flow and relieves jaundice' describes Tian Ji Huang's particular affinity for the hepatobiliary system. Modern clinical use focuses on its role in hepatitis and cholestasis, where it helps the Liver and Gallbladder process and excrete bile, thereby reducing the yellowing of jaundice. In folk and clinical practice across southern China, it is one of the most commonly used single herbs for treating hepatitis.

'Disperses Blood stasis and reduces swelling' means it can move stagnant Blood and bring down inflammation. This action explains its traditional use for traumatic injuries and venomous snakebites, where it is typically crushed fresh and applied directly to the affected area.

Patterns Addressed*

In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Tian Ji Huang 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 Tian Ji Huang addresses this pattern

Tian Ji Huang's cool nature and bitter-sweet taste directly target the Liver and Stomach channels, making it well-suited to clear Damp-Heat that has accumulated in the Liver and Gallbladder. Its ability to promote bile flow and drain Dampness through urination addresses the core mechanism of this pattern, where obstructed Damp-Heat impairs the Liver's free-coursing function and causes bile to overflow into the skin and eyes. This is why it is considered a primary herb for jaundice in folk medicine traditions.

A practitioner would look for one or more of these signs

Jaundice

Yellow discoloration of skin and eyes from Damp-Heat obstructing bile flow

Dark Urine

Scanty, dark yellow urine

Poor Appetite

Nausea and poor appetite from Damp-Heat congesting the middle

Abdominal Distention

Fullness and discomfort in the upper abdomen and flanks

TCM Properties*

Temperature

Cool

Taste

Sweet (甘 gān), Bitter (苦 kǔ)

Channels Entered
Lungs Liver Stomach
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

*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.

Product Details

Manufacturing, supplier, and product specifications

Product Type

Granules

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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

Instructions for safe storage and consumption

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Special Populations

Pregnancy

Contraindicated during pregnancy. Traditional Chinese Materia Medica sources explicitly state that pregnant women should not use Tian Ji Huang (孕妇禁用). Its blood-invigorating and stasis-dispersing (散瘀) actions could potentially stimulate uterine activity and increase the risk of miscarriage. Its cool nature may also be considered unfavourable for supporting pregnancy in TCM theory.

Breastfeeding

No specific safety data on Tian Ji Huang during breastfeeding is available from classical or modern sources. Given its cool nature and heat-clearing properties, cautious use is advisable. It could theoretically affect the nursing infant through breast milk, potentially causing digestive upset in the baby due to its bitter and cooling qualities. Breastfeeding mothers with Spleen deficiency or cold constitution should avoid it. Consult a qualified TCM practitioner before use.

Pediatric Use

Tian Ji Huang has been used historically in children for conditions such as jaundice-type infectious hepatitis and childhood digestive complaints. Classical folk dosage guidelines for children suggest age-based reductions: under 1 year approximately 9g, 1 to 3 years approximately 15g, 3 to 7 years approximately 24g, 7 to 10 years approximately 30g, and 10 to 13 years approximately 36g of dried herb per day, divided into two servings with sugar added for palatability. However, these historical dosages should be confirmed with a qualified practitioner. As a cooling herb, it should be used with extra caution in very young children whose Spleen function is naturally immature and more vulnerable to cold-natured medicines.

Dietary Advice

While taking Tian Ji Huang, it is advisable to avoid cold, raw, and greasy foods that burden the Spleen and Stomach, as the herb's cool nature can compound digestive strain. Alcohol and spicy, heavily fried foods should also be limited, especially when using the herb for liver-protective purposes. Light, easily digestible foods are preferred. In Guangdong folk tradition, the herb is commonly paired with a small amount of brown sugar (黄糖) when made into a tea, which helps moderate its bitter taste and slightly counterbalances its cooling nature.

Cautions & Warnings

Although this herb 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.