Di Fu Zi (Broom Cypress, Kochia Fruit)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Di Fu Zi?

  Roughly 9–15 g in decoction, with some sources giving 10–15 g — a normal mid-range dose for a damp-draining herb. For external use as a wash or soak for itching, considerably larger quantities are decocted and the liquid is applied to the skin rather than taken internally.

  • Internal — approximately 9–15 g decocted, per standard materia medica ranges.
  • External — prepared as a wash/soak; the external dose is not comparable to the internal one and should follow a practitioner’s direction.
  • Part used — the dried mature fruit.

  Source: Sacred Lotus sources & references; cross-referenced against multiple online sources and standard materia medica ranges. Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions for Di Fu Zi?

  Di Fu Zi is considered a relatively gentle herb with no strong classical contraindications, but because it is cold and drains dampness through urination it is traditionally used with care where there is no damp-heat present, and in patients who are already deficient, dry, or losing fluids. Our existing record notes no specific contraindications; the cautions below are the standard ones for its category.

  • Absence of damp-heat — a damp-draining, cold herb is not indicated where the pattern is dry, deficient, or cold.
  • Fluid deficiency — herbs that promote urination are used cautiously where body fluids are already depleted.
  • Allergic skin reaction — rare reports exist of hives, itching, and small blisters on the mouth and lips following oral use. Ironically these mirror the very symptoms the herb is used for, so a worsening rash after starting it warrants stopping and review.
  • Pregnancy — use only under a qualified practitioner, as with any damp-draining herb.

  Source: Sacred Lotus sources & references (existing toxicity note on allergic reactions); cross-referenced against multiple online sources and materia medica consensus. Traditional-use framing; not medical advice.

Chinese Herb Toxicity & Overdose

• Low. Di Fu Zi is not classified as a toxic herb in the materia medica and is used both internally and as an external wash. The documented adverse reports are uncommon allergic-type reactions after oral use — urticaria, itching, and small vesicles on the mouth and lips — rather than intrinsic toxicity.

  One further point belongs to the plant rather than the medicinal fruit, and is worth stating plainly so the two are not confused. Veterinary literature documents a genuine kochia toxicosis in livestock grazed on the plant or fed kochia hay in quantity — reported as liver damage in lambs, altered serum constituents in sheep and cattle, and photosensitization with polioencephalomalacia in range cattle. That is a forage-scale exposure to the whole green plant over weeks. It is not a finding about the small dried fruit used as a Chinese medicinal at gram doses, and no equivalent problem is reported for the herb in traditional or clinical use.

  Source: Sacred Lotus sources & references (existing adverse-reaction note); cross-referenced against multiple online sources. Livestock forage context from PMID 1885402 (Journal of Animal Science, 1991 — hepatotoxicosis in lambs fed Kochia scoparia hay), PMID 1885403 (1991), PMID 2711605 (Veterinary and Human Toxicology, 1989 — grazing trials), PMID 500479 (JAVMA, 1979 — polioencephalomalacia and photosensitization in range cattle). Offered as neutral botanical context, not a safety finding about the medicinal fruit.

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented for Di Fu Zi. Because it promotes urination, general practitioner awareness is reasonable for patients on diuretic therapy or with fluid/electrolyte concerns — this is a precaution based on its traditional action, not a demonstrated clinical interaction. (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 Di Fu Zi (Kochia scoparia fruit)?

  Yes — and unusually for a herb of this profile, the laboratory research lines up closely with the traditional use: a sustained series of Japanese pharmacology studies identified saponins in the fruit that produce measurable anti-itch, anti-allergic and anti-inflammatory effects in animal models. The principal compounds are triterpene saponins, especially momordin Ic and related oleanolic acid glycosides. Human clinical evidence remains absent, so this is supporting context only.

  • Anti-itch (antipruritic) — a numbered research series on Kochiae Fructus isolated oleanolic acid glycosides as the active antipruritic principles and mapped the structural requirements for the effect, finding that a 3-O-glycoside moiety and the 28-carboxyl group were both necessary, with the glucuronide forms most potent. Mouse models.
  • Anti-allergic — a 70% ethanol extract and its component momordin Ic showed anti-allergic effects in animal models, in the same research series.
  • Anti-inflammatory and analgesic — the same extract and momordin Ic showed antinociceptive and anti-inflammatory activity; a separate study found that a methanol extract of the fruit inhibited lipopolysaccharide-induced nitric oxide, prostaglandin E2 and TNF-alpha production in cultured macrophages, giving a mechanism consistent with the traditional damp-heat indications.
  • Topical dermatitis model — a topically applied water extract inhibited the development of contact dermatitis in mice, reducing IL-1β and TNF-alpha expression and suppressing NF-κB and MAP kinase signalling. This is the study that most directly parallels the herb’s traditional use as an external wash for itchy skin.
  • Allergic airway inflammation — the fruit attenuated allergic airway inflammation in an ovalbumin-induced murine asthma model. Animal research, outside the herb’s traditional indications.
  • Liver protection — momordin Ic and oleanolic acid from the fruit reduced carbon-tetrachloride-induced liver injury in rats. Preclinical.
  • Recent work — a 2025 study assessed a whole-plant Bassia scoparia extract for skin repair and protective effects, continuing the dermatological research direction. Laboratory work; note it used the whole plant rather than the fruit alone.

  Taken together this is one of the better preclinical evidence trails among the damp-draining herbs, with a plausible mechanism and an identified active constituent class — but every study above is a cell or animal model. No verified human trial supports a clinical claim.

  Sources: PMID 9853421 (Biological & Pharmaceutical Bulletin, 1998 — antipruritic oleanolic acid glycosides and structure requirement); PMID 9401725 (1997 — anti-allergic effects of the ethanol extract and momordin Ic); PMID 9353570 (1997 — antinociceptive and anti-inflammatory effects); PMID 15056862 (2004 — inhibition of LPS-induced nitric oxide, PGE2 and TNF-alpha in RAW 264.7 macrophages); PMID 24751363 (Journal of Ethnopharmacology, 2014 — topical application inhibits contact dermatitis in mice); PMID 22122306 (Inhalation Toxicology, 2011 — allergic airway inflammation model); PMID 16117609 (Journal of Medicinal Food, 2005 — momordin Ic and oleanolic acid reduce carbon tetrachloride hepatotoxicity in rats); PMID 40864771 (2025 — whole-plant Bassia scoparia extract, dermatological effects). Research context, not a therapeutic claim.

Chinese Herb Notes

• How is Di Fu Zi different from Ku Shen, and what plant is it?

  Both Di Fu Zi and Ku Shen clear damp-heat, expel wind, relieve itching and promote urination — but Ku Shen, being purely bitter and cold, clears damp-heat more strongly, while Di Fu Zi is the better choice for expelling wind-damp and relieving the itching itself. In practice the two are often used together for stubborn itchy skin patterns, with Ku Shen carrying the heat-clearing weight and Di Fu Zi the anti-itch emphasis.

  The plant itself is one Western readers will recognise. Kochia is the ornamental “burning bush” or summer cypress — the soft, rounded green shrub that turns brilliant crimson in autumn — and it is the same plant that dries, snaps off at the base, and rolls across the plains as a tumbleweed. In North America it is a serious agricultural weed rather than a garden novelty: it is widely herbicide-resistant, with documented resistance to glyphosate and to dicamba in field populations, and is the subject of a substantial weed-science literature. So the herb sold in a Chinese pharmacy and the invasive weed a Midwestern farmer fights are the same species.

  Naming note: Our record gives the Latin as Fructus Kochiae Scopariae, matching most materia medica sources. Botanists have since transferred the species, and the currently accepted botanical name is Bassia scoparia (L.) A. J. Scott, with Kochia scoparia retained as a synonym. Both names refer to the same plant; the identity field is left unchanged, and readers searching the botanical or agricultural literature should try both names.

  Source: Sacred Lotus sources & references and existing comparison notes; cross-referenced against multiple online sources; taxonomic synonymy from PMID 38903543 (chloroplast genome of Bassia scoparia (L.) A. J. Scott); herbicide-resistance status from PMID 34373526 (glyphosate resistance) and PMID 32909332 (dicamba resistance).