Alpinia katsumadai

BotanicalBest taken away from food

What is it

Alpinia katsumadai (cao dou kou, Katsumadai galangal) is a ginger-family plant whose seeds are used in traditional Chinese medicine for what TCM describes as warming the stomach and resolving dampness, especially for GI complaints.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

GI complaints (traditional Chinese use)

Mixed Evidence

Used for nausea, vomiting, abdominal distension, and diarrhea in traditional formulas. No rigorous modern RCTs.

How it works

The seeds contain diarylheptanoids (katsumadain compounds), flavonoids, and essential oil. Laboratory and animal studies suggest gastroprotective, anti-inflammatory, antiemetic, and antiviral activity for various constituents. Some diarylheptanoids inhibit neuraminidase in vitro. Human clinical evidence is essentially limited to Chinese-language reports and traditional pharmacy literature.

Dosage

Traditional decoction doses are 3–6 g of dried seed. No FDA-approved dose. DSLD label data is limited.

When and how to take it

Traditional formulas dose between meals.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Dried seed / decoction

Traditional preparation.

Not characterized.

Safety

Traditional use does not document major toxicity at decoction doses. Modern high-dose extract safety is not well characterized.

Who should be cautious

Avoid in pregnancy and breastfeeding due to absent modern data. Use under TCM practitioner guidance.

Interactions

Potential additive effects with GI medications; no clinically established drug interactions documented.

Frequently asked questions

Is this the same as galangal used in cooking?⌄

It is in the same genus as culinary galangal (Alpinia galanga) but a different species used primarily medicinally rather than as a spice.

References

Alpinia katsumadai on Wikidata — Wikidata link

Alpinia katsumadai on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Alpinia katsumadai (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.