Herb

Cao Dou Kou

Katsumada's Galangal Seed | 草豆蔻

Also known as:

Cao Kou , Cao Kou Ren , Grass Cardamom

Cao Dou Kou

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Properties

Aromatic herbs that transform Dampness (芳香化湿药) · Warm

Traditionally supports*

Digestive Health Nausea and Vomiting Relief Bloating Relief Appetite Support

Parts Used

Seed (种子 zhǒng zǐ / 子 zǐ / 仁 rén)

*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

Katsumada's galangal seed is an aromatic, warming herb used primarily for digestive complaints caused by Cold and Dampness in the stomach and intestines. It helps relieve bloating, abdominal pain that improves with warmth, nausea, vomiting, and poor appetite. It is also widely used as a culinary spice in braised meats and stews across southern China.

Herb Category

Aromatic herbs that transform Dampness (芳香化湿药)

Main Actions

  • Transforms Dampness and Moves Qi
  • Warms the Middle Burner
  • Stops Vomiting
  • Disperses Cold

How These Actions Work

'Dries Dampness and moves Qi' (燥湿行气) means Cǎo Dòu Kòu uses its pungent, aromatic, warm nature to transform and disperse Dampness that has accumulated in the Spleen and Stomach, while simultaneously promoting the smooth flow of Qi through the middle part of the body. This is clinically applied when Cold-Dampness blocks the digestive system, causing bloating, fullness, and a heavy sensation in the abdomen. Because the herb is strongly warming and drying, it is particularly suited when the Dampness has a Cold character, indicated by white and greasy tongue coating.

'Warms the Middle Burner' (温中) means this herb delivers warmth directly to the Spleen and Stomach, counteracting Cold that has settled in the digestive organs. This action addresses epigastric and abdominal pain that feels cold, improves when warmth is applied, and worsens after eating cold or raw foods. The Ming Yi Bie Lu described it as warming the interior and relieving abdominal pain.

'Stops vomiting' (止呕) refers to the herb's ability to descend rebellious Stomach Qi and calm nausea and vomiting caused by Cold-Dampness in the Stomach. It is especially appropriate when vomiting is accompanied by a preference for warm drinks, watery vomit, and a white tongue coating. Li Shizhen also noted its use for morning sickness.

Patterns Addressed

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

Cǎo Dòu Kòu is pungent, aromatic, and warm, entering the Spleen and Stomach channels. These properties directly address the pathomechanism of Cold-Dampness encumbering the Spleen, where Cold and Dampness obstruct the middle burner, impairing the Spleen's ability to transform and transport. The herb's strong drying and warming nature disperses Cold-Dampness accumulation, while its aromatic quality 'awakens' the Spleen. Its Qi-moving action helps restore the smooth flow of Qi through the digestive system, relieving the stagnation that causes distension and pain.

A practitioner would look for one or more of these signs

Abdominal Pain

Epigastric and abdominal fullness and distension, worse after eating

Abdominal Cold Sensation

Cold pain in the stomach area that improves with warmth

Poor Appetite

Loss of appetite, no desire to eat

Loose Stools

Loose or watery stools from impaired Spleen transportation

TCM Properties

Temperature

Warm

Taste

Acrid / Pungent (辛 xīn), Aromatic (芳香 fāng xiāng)

Channels Entered
Spleen Stomach
Parts Used

Seed (种子 zhǒng zǐ / 子 zǐ / 仁 rén)

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 Cao Dou Kou seed clusters are round and plump, 1.5 to 2.7 cm in diameter, firm and heavy for their size. The surface should be greyish-brown. When broken open, the white membrane dividing the three seed compartments should be clearly visible, with seeds tightly packed together. Each compartment contains 22 to 100 or more small seeds. Individual seeds are ovoid, multifaceted, about 3-5 mm long, with a greyish-brown surface covered by a translucent white seed coat. The cross-section should be greyish-white. The aroma should be distinctly fragrant (not musty), and the taste strongly pungent and slightly bitter. Avoid specimens that are shrivelled, lightweight, mouldy, or lack aromatic fragrance.

Primary Growing Regions

Primarily produced in Guangdong and Guangxi provinces in southern China. Also found in Hainan, Yunnan, and Taiwan. Guangxi is considered the principal production area. The herb grows wild in mountain forests in these subtropical and tropical regions, at moderate elevations with warm, humid conditions and partial shade.

Harvesting Season

Summer to autumn, when the fruits are nearly mature and beginning to turn yellow. Generally harvested from August to November.

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

3-6g

Maximum

Up to 10g in severe Cold-Dampness patterns, under practitioner supervision. Should not be used at high doses for prolonged periods due to its drying nature.

Notes

Standard decoction dosage is 3 to 6g. The lower end (3g) is suitable for mild Dampness with loss of appetite or mild nausea. The higher end (6g) is appropriate for pronounced Cold-Dampness with epigastric pain and vomiting. Processing method affects clinical application: baking wrapped in flour dough (面包煨, mian bao wei) moderates the herb's acrid dispersing quality and strengthens its warming and Dampness-drying action, making it better suited for treating diarrhoea. The raw form is more dispersing and better for resolving stagnant Qi with nausea and bloating. The herb should be crushed before adding to a decoction to release its aromatic essential oils.

Processing Methods

Processing method

Clean seeds are placed in a dry-frying vessel over low heat and stir-fried until the surface turns slightly yellow and a fragrant aroma emerges. Remove and cool. Crush before use.

How it changes properties

Dry-frying reduces the herb's pungent, aromatic, dispersing nature. The processed form becomes less drying and less volatile, shifting from a primarily Dampness-drying and Qi-moving herb toward a milder, more warming and stomach-settling herb. Temperature remains warm but the intensity decreases.

When to use this form

When the patient has Cold diarrhea from Spleen deficiency but the Cold-Dampness is not as heavy, and the strongly aromatic raw form might be too dispersing. The stir-fried form is gentler on the Spleen.

Toxicity Classification

Non-toxic

Cao Dou Kou is classified as non-toxic in the Chinese Pharmacopoeia and classical texts (the Ming Yi Bie Lu states it is "wu du" / 无毒, non-toxic). There are no known toxic components at standard dosages. The main clinical concern is not toxicity but rather its strongly warm and drying nature, which can damage Yin and consume fluids if used inappropriately or in excess. Traditional processing by wrapping in flour dough and baking (面包煨) moderates its dispersing properties.

Contraindications

Caution

Yin deficiency with Blood dryness (阴虚血燥). Cao Dou Kou is warm and drying, which will further consume Yin fluids and worsen symptoms such as night sweats, dry mouth, and five-palm heat.

Caution

Heat conditions of the Stomach or Heart. When stomach pain or epigastric discomfort is caused by Fire or Heat rather than Cold, this herb's warming nature will aggravate the condition.

Caution

Damp-Heat patterns, summer-heat invasion, or dysentery caused by Damp-Heat. The classical Ben Cao Jing Shu specifically warns against using this herb when conditions arise from Heat and Dampness rather than Cold and Dampness.

Caution

Insufficient body fluids (津液不足) with no Cold-Dampness present. Without pathological Dampness or Cold to resolve, the strongly drying and warming properties will damage fluids unnecessarily.

Special Populations

Pregnancy

Use with caution during pregnancy. Some traditional sources advise against use during pregnancy (the herb is warm, acrid, and Qi-moving, which could theoretically stimulate uterine activity). The Ben Cao Gang Mu notes its use for morning sickness ("妇人恶阻"), suggesting limited historical use in pregnancy for specific indications. However, its strongly warming and drying nature means it should only be used in pregnancy under professional guidance, at low doses, and only when there is a clear Cold-Dampness pattern.

Breastfeeding

No specific classical or modern contraindications for breastfeeding have been documented. However, as a warm, acrid, and drying herb, it could theoretically reduce breast milk production by drying fluids if used in excess. It should be used at low doses and only when clinically indicated (such as for Cold-Dampness-related digestive problems in the nursing mother). Discontinue if any reduction in milk supply or changes in the infant's digestion are observed.

Pediatric Use

Not commonly used in pediatric formulas. If prescribed for children with Cold-Dampness digestive complaints, dosage should be significantly reduced (typically one-third to one-half of the adult dose depending on age and body weight). Its warm, drying nature makes it unsuitable for infants and young children whose digestive systems are still developing and who are prone to fluid depletion. Should only be used short-term under professional guidance.

Drug Interactions

No well-documented pharmaceutical drug interactions have been established for Cao Dou Kou in peer-reviewed literature. Its primary active compounds (cardamonin, alpinetin, flavonoids, and diarylheptanoids) have demonstrated anti-inflammatory activity via NF-kB inhibition in laboratory studies, so a theoretical interaction with immunosuppressant medications is conceivable but unproven. As with most aromatic warming herbs, caution is advised when combining with medications for gastric acid conditions (antacids, proton pump inhibitors), as the herb's stimulating effect on gastric secretions could potentially counteract these drugs. Patients on any regular medication should inform their prescribing practitioner.

Dietary Advice

Avoid cold, raw, and greasy foods while taking this herb, as these counteract its warming and Dampness-resolving actions. Alcohol should be consumed in moderation. Warm, easily digestible foods such as congee, cooked vegetables, and ginger tea complement the herb's therapeutic effects. Avoid excessively spicy or hot foods if there are any underlying Yin-deficiency tendencies, as the herb is already warming.

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.