He Zi (Myrobalan Fruit)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of He Zi?

  3–9 g in decoction (roughly 1–3 qian in the owner’s notes). By tradition the unprepared (raw) fruit is favored to benefit the throat and clear the Lung, while the dry-fried/roasted fruit is used to bind the Intestines and stop diarrhea.

  Source: owner’s Five Branches notes (1–3 qian); standard materia medica ranges and preparation notes. Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions or contraindications for He Zi?

  Because He Zi is strongly astringent, it should not be used in acute or exterior conditions or where there is unresolved internal accumulation. It is traditionally contraindicated in exterior patterns, in early-stage cough or diarrhea, and where there is internal accumulation or stagnation of damp-heat, since binding too early can trap a pathogen.

  Source: owner’s Five Branches notes (Contra: exterior patterns; internal accumulation/stagnation of damp-heat).

Chinese Herb Toxicity & Overdose

• Low at normal doses. Terminalia chebula fruit is regarded as relatively non-toxic; a single oral dose of 2,000 mg/kg produced no fatalities or organ pathology in rats, though some studies noted mild liver/kidney disturbances with prolonged exposure at lower doses.

  Source: Molecules 2024;29(23):5547, comprehensive review of Terminalia chebula fruit (PMID 39683707, PMC 11643145). Research context, not a therapeutic claim.

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented, but a preclinical signal warrants caution. In laboratory study, the He Zi tannin chebulinic acid induced several cytochrome P450 enzymes (CYP1A2, 2C11, 2D2, 2E1), which could in theory alter the metabolism of co-administered drugs. (Preclinical only — flagged for practitioner confirmation; absence of clinical data is not proof of safety.)

  Source: Molecules 2024;29(23):5547 review (PMID 39683707, PMC 11643145). Pharmacokinetic/enzyme-induction finding; not a clinical interaction report.

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 He Zi (Terminalia chebula)?

  Yes — He Zi is one of the better-studied astringent herbs, though most evidence is preclinical. Its fruit contains roughly 149 identified compounds, dominated by hydrolyzable tannins such as chebulinic and chebulagic acid and phenolic acids such as gallic and ellagic acid. Laboratory and animal studies report antioxidant, antimicrobial (including activity against Shigella and Salmonella), anti-inflammatory, antiviral, hepatoprotective and nephroprotective effects. The 2020 Chinese Pharmacopoeia indications — chronic diarrhea, cough and voice loss — mirror the traditional TCM uses. Human clinical evidence remains limited.

  Source: Molecules 2024;29(23):5547, comprehensive review of Terminalia chebula (traditional uses, phytochemistry, pharmacology, toxicity, pharmacokinetics; PMID 39683707, PMC 11643145). Research context, not a therapeutic claim.

Chinese Herb Notes

• How is He Zi different from Wu Mei (mume plum)?

  He Zi and Wu Mei are both sour, astringent fruits that bind the Intestines to stop chronic diarrhea and astringe the Lung to stop chronic cough — but He Zi has a stronger descending action, enters the Lung and Large Intestine, and is distinguished by benefiting the throat and restoring the voice, whereas Wu Mei generates fluids to stop thirst and expels roundworm.

  How it compares within the astringent group:

  • vs Wu Mei — He Zi descends Lung qi more strongly and treats loss of voice; Wu Mei generates fluids and kills/expels parasites.
  • vs Ying Su Ke (poppy husk) — both stop chronic cough and diarrhea, but Ying Su Ke is a toxic, restricted herb focused on the Kidney and on stopping pain; He Zi is non-toxic and works through the Lung and Large Intestine.
  • vs Chi Shi Zhi — the mineral Chi Shi Zhi warms and binds the lower burner and stops bleeding; He Zi additionally treats the Lung, cough and throat.

  Common combinations: with Ma Huang and Mu Xiang for hot-type chronic diarrhea; with Gan Jiang, Chen Pi and Ying Su Ke for cold-type chronic diarrhea.

  Source: owner’s Five Branches notes (comparative-functions set: “He Zi — stronger descending action; Lung, LI chronic cough with Lung deficiency & chronic diarrhea”; “Wu Mei — generates fluids, kills parasites”).