Hemp Seed

Chinese
火麻仁
Pinyin
Huo Ma Ren
Latin
Cannabis Fructus
Botanical illustration of Hemp Seed, Cannabis sativa, showing fruiting female hemp habit, palmate leaves, mature achenes, whole and hulled medicinal seeds, and diagnostic plant details.
Botanical plate by Kodi .

Known in TCM as Huo Ma Ren (火麻仁), this sweet, neutral herb enters the Spleen, Stomach, and Large Intestine. Traditionally, it moistens the intestines and unblocks the bowels - Huo Ma Ren is the classic oily seed for constipation from blood deficiency, fluid depletion, aging, or postpartum dryness, most often applied for constipation. Modern research has identified Polyunsaturated among its active constituents.

Part used: Fruit

Also Known As

Ma Ren Cannabis Seed

Latin: Cannabis Fructus | Pinyin: Huo Ma Ren | Chinese: 火麻仁

TCM Properties

Taste
sweet
Temperature
neutral
Channels
Spleen, Stomach, Large Intestine

Traditional Use

Primary Actions

  • Moistens the intestines and unblocks the bowels - Huo Ma Ren is the classic oily seed for constipation from blood deficiency, fluid depletion, aging, or postpartum dryness.
  • Nourishes while it lubricates - unlike harsh purgatives, it is preferred when the patient is weak, elderly, postpartum, or otherwise not suited to aggressive draining.
  • Functions as both medicine and food material - the seed sits in the food-medicine overlap and can be incorporated into gentler long-view bowel-support strategies.

Secondary Actions

  • This Huo Ma Ren record keeps the broader crude-drug and food-medicine identity, while the next Ma Zi Ren record will lean more heavily into the classical formula-facing constipation tradition.
  • Traditional usage depends on the seed's oily, moistening nature, so it is a poor fit for loose stool or cold-slippery bowel patterns.

Classic Formulas

  • Ma Zi Ren Wan lineage - the best-known classical constipation formula built around hemp seed lubrication.
  • Postpartum Ma Ren pills with Ren Shen and Zhi Ke - traditional approach when blood loss and dryness leave the bowels difficult to move.
  • Gruel or paste combinations with Su Zi, pine nuts, or sesame - gentler moistening strategy for elderly or debilitated constipation.

Classical References

  • The official Chinese medical reference platform describes Huo Ma Ren as sweet and neutral, entering the Spleen, Stomach, and Large Intestine to moisten the intestines and relieve constipation.
  • Traditional application especially emphasizes older adults, postpartum patients, and other deficiency-dryness cases where strong purgation would be too harsh.

Modern Research

Active Compounds

  • Polyunsaturated fatty acids including linoleic and alpha-linolenic acid - the core nutritional and moistening oil fraction
  • Protein and dietary-fiber components - important to the seed's food-medicine identity
  • Minor alkaloids such as trigonelline and betaine - constituents listed in modern Chinese reference material
  • Flavonoids and phenolic compounds - supportive antioxidant-related constituents

Studied Effects

  • A 2026 review summarized hemp seed as a nutrient-dense functional ingredient rich in complete proteins, essential fatty acids, fiber, and antioxidant-related compounds, supporting its modern food-medicine relevance even though that is not the same thing as proving classical TCM indications (PMID 40699152).
  • A 2024 seed-oil study reported antioxidant and antinociceptive activity with acceptable acute toxicology findings in the tested model, illustrating current experimental interest in hemp seed oil rather than in the exact crude medicinal fruit used in decoction practice (PMID 38795371).

PubMed References

Safety & Interactions

Contraindications

  • Loose stools, diarrhea, or slippery bowel patterns
  • Marked Yang deficiency with chronic bowel looseness

Cautions

  • Huo Ma Ren is not equivalent to psychoactive cannabis flower or resin preparations, although trace cannabinoid contamination can vary by product quality.
  • Chinese reference sources caution against combining it with anticholinergic drugs such as atropine.
  • Overuse can aggravate loose stool because the seed is oily and moistening by design.

Drug Interactions

  • Anticholinergic drugs such as atropine - official Chinese reference sources list this combination as inappropriate.

Conditions

Frequently Asked Questions

What is Hemp Seed used for?

Hemp Seed is traditionally used to Moistens the intestines and unblocks the bowels - Huo Ma Ren is the classic oily seed for constipation from blood deficiency, fluid depletion, aging, or postpartum dryness., Nourishes while it lubricates - unlike harsh purgatives, it is preferred when the patient is weak, elderly, postpartum, or otherwise not suited to aggressive draining., Functions as both medicine and food material - the seed sits in the food-medicine overlap and can be incorporated into gentler long-view bowel-support strategies.. Research has investigated its effects on: A 2026 review summarized hemp seed as a nutrient-dense functional ingredient rich in complete proteins, essential fatty acids, fiber, and antioxidant-related compounds, supporting its modern food-medicine relevance even though that is not the same thing as proving classical TCM indications (PMID 40699152).; A 2024 seed-oil study reported antioxidant and antinociceptive activity with acceptable acute toxicology findings in the tested model, illustrating current experimental interest in hemp seed oil rather than in the exact crude medicinal fruit used in decoction practice (PMID 38795371)..

What are other names for Hemp Seed?

Hemp Seed is also known as Ma Ren, Cannabis Seed. In TCM: 火麻仁 (Huo Ma Ren); Cannabis Fructus.

Is Hemp Seed safe during pregnancy?

The safety of Hemp Seed during pregnancy has not been established. Consult a qualified healthcare provider before use.

What are the contraindications for Hemp Seed?

Hemp Seed should not be used in: Loose stools, diarrhea, or slippery bowel patterns; Marked Yang deficiency with chronic bowel looseness. Consult a qualified practitioner before use.

Does Hemp Seed interact with any medications?

Hemp Seed may interact with: Anticholinergic drugs such as atropine - official Chinese reference sources list this combination as inappropriate.. Always inform your healthcare provider of any herbal supplements you are taking.