Yi Zhi Ren (Black Cardamom, Alpinia Oxyphylla Fruit)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Yi Zhi Ren?

  3–9 g in decoction (owner’s notes give 1–2 qian, roughly 3–6 g). It is often used in small amounts within a formula and, being an aromatic, is not cooked for long.

  Source: owner’s Five Branches notes; standard materia medica ranges. Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions or contraindications for Yi Zhi Ren?

  Yi Zhi Ren is warming and drying, so it is not appropriate for heat or yin-deficiency patterns. Owner’s notes caution against use in yin deficiency with heat signs, in damp-heat urinary problems (painful/scanty urination, urinary-tract infection), and in heavy menstruation arising from heat — situations its warmth could aggravate.

  Source: owner’s Five Branches notes (contraindications). Traditional-use framing; not medical advice.

Chinese Herb Toxicity & Overdose

• Low. No significant toxicity is reported at normal therapeutic doses. Alpinia oxyphylla fruit is a culinary-grade aromatic (a “black cardamom” relative) with a long record as a “medicine-and-food homologous” herb.

  Source: materia medica consensus; no toxicity signal in the reviewed research (PubMed 40650004).

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented. Absence of documented interactions is not proof of safety; a practitioner should confirm suitability alongside prescription medication. (Flagged for practitioner confirmation.)

Western / Biomedical Research

Chinese Herb Clinical Studies & Research

Provided as research context — a summary of published biomedical study, not a therapeutic or medical claim.

• Is there modern research on Alpinia oxyphylla (Yi Zhi Ren)?

  Yes, but it is almost entirely preclinical — laboratory and animal studies, with no human clinical trials identified. A 2025 research-advances review reports that Alpiniae oxyphyllae Fructus contains flavonoids, diarylheptanoids, sesquiterpenes and volatile oils, with nootkatone, chrysin, protocatechuic acid and oxyphylla A among the studied compounds. In cell and animal models these show anti-inflammatory activity (suppressing NO, TNF-α and IL-6 in stimulated microglia via MAPK) and antioxidant, anti-apoptotic effects (via PI3K/AKT), with neuroprotective signals in models of Alzheimer’s disease, Parkinson’s disease and cerebral ischemia.

  Sources: PubMed 40650004 / PMC 12250459 (2025 review, Alpiniae oxyphyllae Fructus neuroprotection); Chinese Medicine, 2021, doi 10.1186/s13020-021-00495-2 (cerebral-infarction model, rats). Research context, not a therapeutic claim; no human clinical evidence identified.

Chinese Herb Notes

• How is Yi Zhi Ren different from Bu Gu Zhi, and what is it combined with?

  Both Yi Zhi Ren and Bu Gu Zhi tonify the Kidney and warm the Spleen and are used for urinary incontinence and daybreak (early-morning) diarrhea — but Yi Zhi Ren leans toward warming the Spleen, while Bu Gu Zhi is the more strongly Kidney-tonifying of the pair. This makes Yi Zhi Ren the choice when drooling, poor appetite, and cold-type diarrhea dominate, and Bu Gu Zhi when the lower-back and Kidney-yang deficiency is primary.

  Common combinations:

  • With Shan Yao and Wu Yao (Suo Quan Wan, “Shut the Sluice Pill”) — for frequent urination and enuresis from Kidney and Bladder cold.
  • With warming Spleen/Kidney herbs — for chronic thin diarrhea and profuse clear saliva from middle-jiao cold.

  Source: owner’s Five Branches notes (Bu Gu Zhi / Yi Zhi Ren comparison and combinations); Sacred Lotus relationships (appears in Suo Quan Wan).