Cassia Seed

Chinese
决明子
Pinyin
Jue Ming Zi
Latin
Semen Cassiae

TCM Properties

Taste
bitter, sweet, salty
Temperature
cool
Channels
Liver, Large Intestine

Traditional Use

Primary Actions

  • Clears Liver Heat and brightens the eyes - Jue Ming Zi is one of the classic eye herbs for red, swollen, painful, photophobic, or chronically strained eyes when Liver Fire, Wind-Heat, or residual Heat disturbs the visual orifices.
  • Calms Liver Yang and draws excess upward movement downward - it is widely chosen for dizziness, headache, irritability, and high-blood-pressure patterns that present with red eyes or clear signs of upward-rushing Liver Fire.
  • Moistens the Intestines and eases dry constipation - the seed's oily nature lubricates while its bitter-cool profile clears Heat, making it useful when constipation appears together with internal Heat signs rather than pure cold deficiency.
  • Benefits Liver and Kidney systems while clearing - Jue Ming Zi is milder than shell or mineral sedatives and can therefore be combined in long-view formulas for aging vision, chronic eye fatigue, and mixed excess-deficiency patterns.

Secondary Actions

  • Roasted Jue Ming Zi is commonly preferred in tea and long-course use because processing reduces the harsher laxative anthraquinone effect while preserving the eye-brightening and Yang-calming profile.
  • The herb is often paired rather than used alone: Ju Hua broadens wind-heat coverage, Gou Qi Zi deepens Yin support, and Gou Teng strengthens the descending Yang-calming action.

Classic Formulas

  • Shi Hu Ye Guang Wan (石斛夜光丸) - famous eye formula in which Jue Ming Zi helps clear residual Liver Heat and brighten vision while richer ingredients nourish the Liver and Kidneys.
  • Jue Ming Zi tea with Ju Hua and Gou Qi Zi - a long-standing food-herb pattern for red or tired eyes, blurry vision, and mild headache from prolonged eye strain or Liver Heat.
  • Jue Ming Zi with Gou Teng and Xia Ku Cao - classic-caliber pairing pattern for red eyes, dizziness, and hypertension presentations marked by rising Liver Yang or Fire.

Classical References

  • Me and Qi records Jue Ming Zi as a top-grade herb first noted in the Shen Nong Ben Cao Jing and emphasizes its reputation for eye health, Liver-Heat clearing, Yang-calming, and bowel moistening.
  • Traditional comparison literature repeatedly contrasts Jue Ming Zi with Shi Jue Ming: both brighten the eyes, but Jue Ming Zi is lighter, less mineral-heavy, and uniquely moistens the bowels.
  • IDENTITY NOTE: the Chinese Pharmacopoeia tradition recognizes the seeds of Senna obtusifolia and Senna tora under the Cassiae Semen identity; the older stub Latin `Semen Sennae` has been normalized here to `Semen Cassiae`.

Modern Research

Active Compounds

  • Aurantio-obtusin (anthraquinone) - a principal quality marker and one of the best-studied Cassiae Semen constituents
  • Obtusifolin, obtusin, and chryso-obtusin (anthraquinones) - prominent seed compounds linked to lipid, vascular, and anti-inflammatory research
  • Chrysophanol, emodin, aloe-emodin, and physcion (anthraquinones) - classic bioactive molecules associated with laxative and antioxidant pharmacology
  • Rubrofusarin and toralactone-type naphthopyrones - important non-anthraquinone phytochemicals in the seed
  • Volatile oil and seed-oil fractions - support both phytochemical complexity and the traditional oily bowel-moistening rationale

Studied Effects

  • A comprehensive 2017 review of Cassiae Semen summarized phytochemistry and broad preclinical pharmacology, highlighting antihyperlipidemic, antidiabetic, hypotensive, hepatoprotective, antibacterial, antioxidant, and neuroprotective activity (PMID 28677746).
  • In a diabetic-rat model, Cassiae Semen extract improved glucose and lipid handling while reducing oxidative stress and kidney injury markers, giving modern support to its use in metabolic-vascular patterns (PMID 31022564).
  • A randomized double-blind placebo-controlled crossover study of Cassia tora supplementation in healthy adults examined safety and beneficial effects in human use, reflecting modern interest in the seed as a functional food-herb bridge (PMID 29165093).

PubMed References

Safety & Interactions

Contraindications

  • Pregnancy
  • Chronic diarrhea or loose stools
  • Spleen and Stomach deficiency cold
  • Hypotension

Cautions

  • Anthraquinone-rich seeds can be too laxative for people who are depleted, cold, or already having loose stools
  • Prolonged excessive use may irritate the bowel, especially in raw form rather than dry-fried form
  • MSK page not found - drug interaction data not available from Memorial Sloan Kettering integrative medicine database

Conditions