Huo Ma Ren (Hemp Seeds or Cannabis Seeds)

Chinese Herb Actions

Chinese Herb Dosage

• What is the dosage of Huo Ma Ren?

  Our reference range is 9–15 g in decoction, with up to 45 g recorded when the herb is used alone or as the chief herb of a formula. The part used is the seed. Reference sources note that the seed is crushed before decoction so that its oil can be extracted into the liquid — that is the property the herb is valued for.

  • Standard range — 9–15 g.
  • Higher range — up to 45 g where it is the principal or sole herb.
  • Part used — the seed only.

  Source: Sacred Lotus sources & references (Bensky; Chen & Chen); cross-referenced against multiple online sources. Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions for Huo Ma Ren?

  Yes — the main ones are pattern-based rather than toxicological: it is contraindicated where there is diarrhoea, and the classical sources record cautions at large quantities. As a moistening laxative it is straightforwardly wrong in anyone whose stools are already loose.

  • Diarrhoea or loose stools — do not use.
  • Large quantities — the reference literature records that large doses may produce leakage-type symptoms such as vaginal discharge or spermatorrhea, and describes acute reactions after very large ingestions, including nausea, vomiting, diarrhoea, numbness of the limbs and disorientation. This is a recorded caution about excess, not a description of ordinary use.
  • Weak Spleen with chronic loose stools — use with care.
  • Legal and regulatory status — because this herb is the seed of Cannabis sativa, its availability and legality differ between jurisdictions and between product categories. PMID 33614949. Our records flag this herb accordingly. This is a neutral disclosure of fact.
  • Pregnancy — best used only under practitioner supervision; the herb appears in postpartum contexts in the classical literature rather than as a routine pregnancy herb.

  Source: Sacred Lotus sources & references (Bensky; Chen & Chen); PMID 33614949; cross-referenced against multiple online sources. Neutral reference information, not usage instructions.

Chinese Herb Toxicity & Overdose

• Low at normal reference doses. Hemp seed has a long history as a food as well as a medicinal, and food-science reviews characterise it as a nutritional source of essential amino acids, fatty acids, minerals, vitamins and fibre rather than as a toxic material; the plant’s intoxicating constituent is associated with the flowering tops, not the seed. PMID 33614949; PMC 7891210; PMID 35906681; PMC 9338676.

  The toxicity recorded for this herb in the classical materia medica concerns quantity: very large ingestions have been associated with nausea, vomiting, diarrhoea, limb numbness and disorientation. Standard reference doses are far below that. No organ toxicity is established at normal doses in the sources reviewed.

  Source: PMID 33614949 / PMC 7891210; PMID 35906681 / PMC 9338676; Sacred Lotus sources & references (Bensky; Chen & Chen). Reference note, not a safety guarantee.

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented for Huo Ma Ren in the literature reviewed. As with any laxative herb, practitioner awareness is reasonable where a patient is already taking laxatives, stool softeners or medications whose absorption is affected by gut transit time — this is general pharmacological prudence, not a demonstrated 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 Huo Ma Ren (Semen Cannabis Sativae)?

  Yes — and unusually for a single herb, the strongest evidence is human clinical: randomized trials of Ma Zi Ren Wan (Hemp Seed Pill), the formula built around this herb, for functional constipation. The evidence is about the formula, not the isolated seed.

  • Randomized placebo-controlled trial — a two-part study first determined an optimal dose of Hemp Seed Pill among three tested doses (96 subjects), then compared that dose with placebo in 120 adults with functional constipation (Rome III criteria) over an 8-week treatment period with 8 weeks of follow-up. Responder rates for complete spontaneous bowel movement were 43.3% for the herbal arm versus 8.3% for placebo during treatment, and 30.0% versus 15.0% during follow-up. Participants also reported reduced severity of constipation and straining and less use of rescue therapy; no serious adverse events were reported. PMID 21045817.
  • Further randomized work — a subsequent randomized controlled trial of Chinese herbal medicine for functional constipation. PMID 24473591.
  • Pilot trial in a palliative setting — a pilot randomized placebo-controlled study of a modified Ma Zi Ren Wan for constipation in palliative cancer patients. PMID 35236375; PMC 8889635.
  • Mechanism — a focused network-pharmacology analysis of Ma Zi Ren Wan in functional constipation. PMID 29632490; PMC 5879454.
  • Seed composition — food-science reviews characterise hemp seed as a source of essential amino acids and fatty acids, minerals, vitamins and fibre, and set out the seed’s place in the plant relative to the cannabinoid-bearing inflorescence. PMID 33614949 / PMC 7891210; PMID 35906681 / PMC 9338676.

  Scope note: the trials above test a multi-herb formula in which Huo Ma Ren is the chief herb, not the seed on its own, so the results should not be read as efficacy data for the single herb. No randomized trials of Huo Ma Ren as a sole agent were identified in the literature reviewed.

  Sources: PMID 21045817; PMID 24473591; PMID 35236375 / PMC 8889635; PMID 29632490 / PMC 5879454; PMID 33614949 / PMC 7891210; PMID 35906681 / PMC 9338676. Research context, not a therapeutic claim.

Chinese Herb Notes

• Is Huo Ma Ren the same as cannabis, and how does it compare to other moistening laxatives?

  Huo Ma Ren is the seed of Cannabis sativa — not the flowering tops, and not the psychoactive part of the plant. The seed itself is essentially devoid of the plant’s intoxicating constituent; food-science reviews describe hemp seed as a source of protein, essential fatty acids, minerals, vitamins and fibre, and treat the cannabinoid-rich material as belonging to the inflorescence rather than the seed. PMID 33614949; PMC 7891210; PMID 35906681; PMC 9338676. Where trace cannabinoids are detected in commercial seed products, the food-science literature attributes it to surface contamination during harvesting and handling, not to the seed’s own chemistry.

  • Legal status varies by jurisdiction — regulation of hemp- and cannabis-derived products is described in the review literature as diversified and complex worldwide, and rules differ by country and by product type. PMID 33614949. Anyone dealing with this herb should check the law where they are; we state this as a factual disclosure, not as advice.
  • Against Yu Li Ren — both are moistening seed laxatives, but Yu Li Ren is markedly stronger and also promotes urination and reduces edema; Huo Ma Ren is the gentler, more tonifying option for the frail.
  • Against Xing Ren — Xing Ren moistens the intestines while primarily descending Lung qi to stop cough; Huo Ma Ren is a dedicated intestinal moistener with a nourishing quality.
  • Against Da Huang — Da Huang purges by driving downward and is inappropriate for a depleted patient; Huo Ma Ren lubricates and is the one that suits deficiency. The two appear together in Ma Zi Ren Wan precisely so the moistening herb can temper the purgative.
  • Classical formula context — Ma Zi Ren Wan (Hemp Seed Pill) and Run Chang Wan (Moisten the Intestines Pill) for dry constipation; and, in its yin-nourishing role, Zhi Gan Cao Tang, Da Ding Feng Zhu and San Jia Fu Mai Tang. (Traditional formula context, not treatment advice.)

  Source: Sacred Lotus sources & references (Bensky; Chen & Chen) and Sacred Lotus formula cross-reference; PMID 33614949 / PMC 7891210; PMID 35906681 / PMC 9338676; cross-referenced against multiple online sources.