Shi Jue Ming (石决明) — Abalone Shell in TCM | Liver Yang & Eye Clarity

At a Glance

• Herb: Shi Jue Ming
• Chinese name: 石决明 (Shí Jué Míng)
• Latin name: Haliotidis Concha
• Nature: Cold
• Taste: Salty
• Meridian: Liver
• Category: Herbs that Calm the Liver and Extinguish Wind
• Introduction: Shi Jue Ming (石决明, Haliotis diversicolor or H. asinina shell — abalone shell) is the iridescent inner shell of abalone, a large marine gastropod revered as both a culinary delicacy and a Liver-clearing medicine. Recorded in the Ming Yi Bie Lu, its salty, cold, and heavy-sinking character makes it one of the primary heavy shell agents for calming Liver Yang and clearing Liver Heat to benefit the eyes — the two actions that define its clinical niche. Unlike Mu Li or Long Gu which primarily calm the spirit, Shi Jue Ming’s tropism is specifically and strongly Liver-focused: it anchors ascending Yang, clears Liver Fire and Liver-Yin deficiency Heat from the eyes, and dissolves superficial visual obstruction (corneal opacity). Calcium carbonate, organic matrix proteins, and trace elements from the shell demonstrate antioxidant, anti-inflammatory, and mild hypotensive effects.

Action

• Calms Liver Yang and anchors Yang — the primary heavy shell agent for Liver Yang rising: headache, dizziness, tinnitus, and hypertension.
• Clears Liver Fire and brightens eyes — treats red, painful, swollen eyes and severe photophobia from Liver Fire.
• Nourishes Liver Yin and brightens eyes — used for dry eyes, blurred vision, and night blindness from Liver-Kidney Yin deficiency.
• Dissolves visual obstruction — used for superficial corneal opacity (翳障) and pterygium from Liver Heat accumulation in the eyes.

Clinical Application

• Liver Yang rising: headache, dizziness, tinnitus, hypertension, irritability — combined with Gou Teng, Ju Hua, and Niu Xi.
• Liver Fire eye disorders: acute red, swollen, painful eyes, photophobia, excessive tearing — combined with Long Dan and Huang Qin.
• Liver-Kidney Yin deficiency eyes: chronic dry eyes, blurred vision, night blindness, and visual fatigue — combined with Gou Qi Zi and Nu Zhen Zi.
• Corneal opacity and pterygium: superficial visual obstruction from prolonged Liver Heat — combined with Qing Xiang Zi and Mi Meng Hua.
• Hypertension: widely used as an adjunctive Liver Yang anchoring agent in TCM hypertension protocols.

Precautions

• Dose: 6–20 g; must be pre-decocted (先煎) 30–60 minutes — the dense shell matrix requires extended extraction to release active components.
• Contraindicated in Spleen-Stomach deficiency with Cold and loose stools — the heavy, cold nature injures the Middle Jiao.
• Contraindicated in deficiency-Cold patterns without genuine Liver Yang excess or Liver Heat.
• Calcined Shi Jue Ming (煅石决明) has reduced cold nature and stronger astringent visual-clearing action — preferred for corneal opacity; raw form preferred for Liver Yang and Liver Fire.
• Caution with calcium channel blockers — high calcium carbonate content may theoretically interact with calcium homeostasis medications.
• Generally well-tolerated; one of the safer heavy mineral agents when properly pre-decocted.

Formula

• Jian Ling Tang (镇肝熄风汤): Shi Jue Ming combined with Dai Zhe Shi, Long Gu, Mu Li, Niu Xi, Bai Shao, and Tian Dong for Liver-Wind stirring with Yang rising.
• Combined with Gou Teng, Tian Ma, and Ju Hua — the standard TCM hypertension quartet for Liver Yang rising.
• Shi Jue Ming San (石决明散): Shi Jue Ming with Jue Ming Zi, Qing Xiang Zi, and Mu Zei — for Liver Heat visual obstruction and pterygium.
• Ming Mu Di Huang Wan (明目地黄丸): combined with Liu Wei Di Huang Wan base and Gou Qi Zi for Liver-Kidney Yin deficiency visual impairment.

Combinations

• Shi Jue Ming (石决明) + Tian Ma (天麻) + Gou Teng (钩藤) + Niu Xi (牛膝) → Tian Ma Gou Teng Yin (天麻钩藤饮) — anchor Liver yang; treat hypertension headache and dizziness
• Shi Jue Ming (石决明) + Dai Zhe Shi (代赭石) + Long Gu (龙骨) + Mu Li (牡蛎) → Zhen Gan Xi Feng Tang (镇肝熄风汤) — anchor Liver yang, stop Liver wind; treat hypertensive stroke and tremor
• Shi Jue Ming (石决明) + Jue Ming Zi (决明子) + Ju Hua (菊花) → clear Liver heat, brighten eyes; treat red eye and blurred vision
• Shi Jue Ming (石决明) + Shu Di (熟地) + Gou Qi Zi (枸杞子) + Ju Hua (菊花) → Qi Ju Di Huang Wan variant — nourish Liver-Kidney yin; treat vision decline from Liver-Kidney deficiency
• Shi Jue Ming (石决明) calcined powder → topical for corneal opacity and pterygium; preparation: pre-decoct 30–60 minutes (先煎) — dense shell requires extended extraction; raw Shi Jue Ming (生石决明) — stronger Liver yang anchoring and eye-brightening; calcined Shi Jue Ming (煅石决明) — astringent, tonifies Liver-Kidney yin, preferred for visual deficiency; official species: Haliotis diversicolor (nine-hole abalone — most common), H. discus hannai (four-hole), H. laevigata (Australian); iridescent inner nacre surface used; distinction from Mu Li: Shi Jue Ming strongly targets Liver and eyes; Mu Li is preferred for softening nodules

Pharmacological Effects

• Liver-yang anchoring / antihypertensive
  • calcium + taurine — reduce vascular smooth muscle tone
  • cold salty nature — pharmacologically vasodilatory
  • reduce sympathetic tone
  • porphyrin compounds — NO-releasing activity
  • reduce peripheral resistance
  • clinical combination in 天麻钩藤饮 well-validated for hypertension
• Vision-protecting
  • carotenoids — zeaxanthin and astaxanthin are primary macular pigments
  • protect retinal photoreceptors from oxidative damage and UV light
  • zinc — essential for retinal dehydrogenase and rhodopsin synthesis
  • selenium — cofactor for glutathione peroxidase protecting retina
  • conchiolin peptides — promote corneal epithelial regeneration
• Anti-inflammatory
  • porphyrins — inhibit COX-2, 5-LOX
  • reduce prostaglandin synthesis
  • reduce intraocular inflammation
• Anticonvulsant
  • calcium ions — stabilize neuronal membranes
• Antacid
  • CaCO₃ — gastric acid neutralization
• Immunostimulant
  • polysaccharides — activate macrophages, NK cells
• Neuroprotective
  • zinc + selenium + carotenoids — antioxidant protection
• Antitumor
  • conchiolin peptides — anti-proliferative

Classic Description

• Ming Yi Bie Lu: ‘Governs eye pterygium and visual obstruction with pain, and blue-green blindness.’
• Ben Cao Gang Mu: ‘Shi Jue Ming is a Foot Jueyin channel herb; Foot Jueyin opens its orifice at the eye. This substance is salty — saltiness can soften hardness, hence it produces clarity of vision; it calms and anchors the Liver, hence can treat dizziness.’
• Ben Cao Jing Shu: ‘Shi Jue Ming is a Foot Jueyin channel herb; Foot Jueyin opens its orifice at the eye; the eye receives blood and can see… this herb primarily nourishes yin and clears heat, hence it can treat bone-steaming taxation heat, free the five strangury conditions, resolve heat toxins, and disperse sores and swelling.’
• Yi Xue Zhong Zhong Can Xi Lu: ‘Shi Jue Ming, flavor mildly salty, nature mildly cool — the essential herb for cooling and anchoring the Liver; Liver opens its orifice at the eye, hence it brightens the eyes.’