
Alpinia oxyphylla
Also known as bitter cardamom, black cardamom (trade misnomer), yi zhi ren, yì zhì rén, yì zhì.
Yi zhi ren is the ripe, dried fruit of Alpinia oxyphylla, a ginger-family herb of Hainan, Guangdong and Guangxi in southern China, where it is cultivated under forest canopy. The name means benefit wisdom, an echo of its old reputation for supporting memory, but its daily clinical work is warming the kidney and spleen to hold urine, essence, stool and saliva in place. It is one of the four famous southern medicinals of Hainan and a standard component of formulas for enuresis and nocturia.

Ask Herbert about Sharp-leaf galangal. Herbert is the master herbalist inside Bountiful Herbs: he answers from this plate and eleven hundred others, with dosing, pairing and cautions. Your first ten questions are free.
Ask HerbertA child who wets the bed, sleeps deeply, has a pale face and cold feet and passes abundant clear urine
An older patient with nocturia several times a night, a cold lower back, loose morning stools and a pale, wet tongue
Drooling or a mouth full of thin saliva in a patient with poor appetite and cold hands
The record lists 8 contraindications; open the plate in the library to read them in full.
Reach for yi zhi ren when the lower burner is cold and leaky. In the classic pairing of Suo Quan Wan it sits with wu yao and shan yao for frequent urination, enuresis and nocturia; with sang piao xiao and fu pen zi it firms the bladder and kidney more strongly, and with bu gu zhi, rou dou kou and wu zhu yu it addresses dawn diarrhea.
Temperature: warm. Taste: acrid. Channels: Spleen, Kidney. Actions: Warms the kidney, secures the essence and restrains urine; Warms the spleen, stops diarrhea and checks excessive salivation; Astringes and holds in what a cold, deficient lower burner lets slip.
| Preparation | As written | Metric |
|---|---|---|
| Decoction | 3-10 g dried fruit daily in decoction | 3000-10000 mg |
| Powder or pill | 1-3 g powdered fruit twice daily | 1000-3000 mg |
| Tincture (1:5, 60%) | 1-3 mL three times daily | 1-3 mL |
Doses are reproduced from the sources for practitioners and are not a recommendation for any person.
Overview. Yi zhi ren is the ripe, dried fruit of Alpinia oxyphylla, a ginger-family herb of Hainan, Guangdong and Guangxi in southern China, where it is cultivated under forest canopy. The name means benefit wisdom, an echo of its old reputation for supporting memory, but its daily clinical work is warming the kidney and spleen to hold urine, essence, stool and saliva in place. It is one of the four famous southern medicinals of Hainan and a standard component of formulas for enuresis and nocturia.
Clinical Notes. Reach for yi zhi ren when the lower burner is cold and leaky. In the classic pairing of Suo Quan Wan it sits with wu yao and shan yao for frequent urination, enuresis and nocturia; with sang piao xiao and fu pen zi it firms the bladder and kidney more strongly, and with bu gu zhi, rou dou kou and wu zhu yu it addresses dawn diarrhea.
Chinese Medicine Profile. Temperature: warm. Taste: acrid. Channels: Spleen, Kidney. Actions: Warms the kidney, secures the essence and restrains urine; Warms the spleen, stops diarrhea and checks excessive salivation; Astringes and holds in what a cold, deficient lower burner lets slip.
Sharp-leaf galangal stands in 11 documented formulas in the library, among them suo quán wán, bì xiè fên qing yin, zhông mǎn fên xião tāng, thông mǎn fên xiào wán.

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