Si Gua Luo (Dried Skeleton of Vegetable Sponge)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Si Gua Luo?

  Commonly 5–15 g decocted (reputable sources give overlapping ranges of about 5–15 g, 6–12 g, or 6–15 g), with some modern clinical sources describing doses up to ~30 g for more severe wind-damp painful obstruction. As a light, fibrous material it is typically added to a decoction along with other herbs rather than used alone.

  • Charred (carbonized) form — used in a smaller amount, about 1.5–3 g as a powder, specifically for its hemostatic (stop-bleeding) action — a different preparation and indication from the raw, decocted herb.
  • Traditional lactation-specific preparation — some sources describe about 3–6 g powdered and taken with warm wine for insufficient lactation or breast distention, rather than decoction.

  Source: cross-checked ranges from multiple online sources. Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions for Si Gua Luo?

  Si Gua Luo is widely regarded as a mild, well-tolerated herb with no toxic constituents reported in the traditional or modern literature at standard doses. The main caution raised across sources is for people with pronounced Spleen-Stomach yang-deficiency/cold (loose stools, poor appetite, cold abdomen) — several sources describe the herb as slightly cool and slippery in quality, which could aggravate this pattern at higher doses.

  • Pregnancy — as a blood-invigorating, channel-unblocking herb, standard TCM caution applies; some sources specifically advise avoiding the charred form and high doses during pregnancy, and using it only under a qualified practitioner, particularly in the first trimester.

  Note: Most cross-checked sources describe Si Gua Luo's nature as simply “neutral” (matching this site’s own record of “Sweet, Neutral”), while a minority describe it as “neutral, slightly cool.” We treat this as the same substance with a minor descriptor variance rather than a real conflict, and have left this site’s own properties record unchanged.

  Source: cross-checked cautions from multiple online sources, and general aggregator summaries; this site’s own identity record. Reference only, not a substitute for practitioner guidance.

Chinese Herb Toxicity & Overdose

• Non-toxic. Si Gua Luo has a long dietary and medicinal history (the mature fruit is a common vegetable/loofah when young, and the dried vascular skeleton has been used medicinally since at least the Ming-dynasty Compendium of Materia Medica), and no toxic components or toxicity symptoms are reported in the literature at standard doses.

  Source: cross-checked materia medica consensus (related summaries and multiple online sources). Reference note, not a safety guarantee.

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented for Si Gua Luo. Preclinical research (below) shows anti-inflammatory activity via macrophage/NF-κB-related pathways, which is mechanistic and preclinical only — it has not been shown to interact clinically with anti-inflammatory or analgesic medications. (No specific interaction is established; flagged only as a general awareness point.)

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 Si Gua Luo (Luffa cylindrica vascular bundle)?

  Yes — research is mostly preclinical chemistry/pharmacology on Luffa cylindrica fruit extracts, plus one applied clinical case series using the dried vascular skeleton itself as a wound-care material. Most of the pharmacology work below tests peel, pulp, or saponin extracts of the fruit rather than the specific dried, processed vascular-bundle form used as Si Gua Luo in TCM, so it should be read as supportive context rather than direct proof of the traditional oral use.

  • Anti-inflammatory activity on macrophages (preclinical) — ethanol and ethyl acetate extracts of Luffa cylindrica peel and pulp reduced nitric oxide and prostaglandin E2 production, and inhibited IL-6, in lipopolysaccharide-activated RAW 264.7 macrophage cells; the peel extract also suppressed inducible nitric oxide synthase expression. Cell-based, not clinical.
  • Anti-inflammatory mechanism — lucyoside B (preclinical) — a triterpenoid saponin isolated from Luffa cylindrica fruit, lucyoside B suppressed pro-inflammatory mediators (iNOS, IL-6, MCP-1, nitric oxide) in activated macrophages by blocking both the NF-κB pathway (inhibiting IκBα phosphorylation/degradation) and the AP-1 pathway (reducing JNK, ERK, and p38 phosphorylation). Mechanistic cell-based study, not clinical.
  • Applied use of the dried vascular skeleton itself — a case series of 16 patients with limb skin defects (crush injuries, open wounds, one diabetic foot ulcer) used a Retinervus Luffae Fructus–based device for negative-pressure wound therapy; investigators reported fresh granulation with no macroscopic necrosis and a mean healing time of about 8.5 days, and noted cost-effectiveness versus standard NPWT needs further study. This is a modern biomedical repurposing of the material's netlike fibrous structure for external wound care — not the traditional internal TCM use, and not a treatment claim.

  Human clinical evidence for the traditional internal/oral indications (wind-damp bi, breast collateral obstruction, phlegm-heat cough) is not established in the literature reviewed; the above is preclinical pharmacology plus one applied-device case series, not proof of the classical uses.

  Note: This site’s own record records the Latin name as “Fasciculus Vascularis Luffae” (matching the herb's current listing), while much of the wider literature — including PubMed indexing and the brief for this substance — uses “Retinervus Luffae Fructus” (also seen as “Fructus Luffae Retinervus”). We believe these all refer to the same substance (the dried vascular bundle of the mature luffa fruit); this site’s own identity record is left unchanged.

  Sources: PMID 22868104 (Food Chemistry, anti-inflammatory macrophage study, peel/pulp extracts); DOI 10.1016/j.jff.2020.103941 (Journal of Functional Foods, lucyoside B mechanism); PMID 24526084 (Journal of Wound Care, Retinervus Luffae Fructus negative-pressure wound therapy case series). Research context, not a therapeutic claim.

Chinese Herb Notes

• What are Si Gua Luo's key combinations, and how does it differ from other breast-collateral / channel-unblocking herbs?

  Si Gua Luo is prized above all for the breast collaterals — its fibrous, netlike vascular structure is traditionally read as mirroring the body's own channel-and-collateral network (a classical “like-treats-like” rationale for its channel-opening reputation, not a scientific mechanism), and it is one of the most consistently cited herbs across sources for breast distention, obstruction, and insufficient lactation.

  • With Wang Bu Liu Xing and Lu Lu Tong — a classic pairing to unblock the breast collaterals and support lactation; Wang Bu Liu Xing contributes a stronger blood-invigorating push, while Lu Lu Tong adds its own channel-opening, mildly diuretic action.
  • With Pu Gong Ying (dandelion) — for mastitis/breast abscess with heat-toxin signs (redness, swelling, heat, pain): Si Gua Luo opens the breast collaterals while Pu Gong Ying clears heat-toxin and disperses nodules.
  • With Gua Lou (trichosanthes fruit) and Yu Jin (curcuma) — for phlegm-heat cough with chest oppression, combining Si Gua Luo's collateral-opening and phlegm-resolving action with Gua Lou's phlegm-clearing and Yu Jin's qi-and-blood-moving action.
  • With Dang Shen and Huang Qi — for insufficient lactation that is primarily qi-deficient rather than stagnation-type, pairing Si Gua Luo's channel-opening action with qi tonics.

  In the Sacred Lotus formula database, Si Gua Luo appears in Qing Luo Yin (Clear the Collaterals Decoction); outside sources also place it in formulas such as Xiao Huo Luo Wan (Minor Invigorate the Channels Pills). (Formula context, not treatment advice.)

  Source: cross-checked combinations from multiple online sources; this site’s own formula link (Qing Luo Yin).