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    Yemama Apothecary

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    Heat-Clearing, Diuretic, Spleen-Awakening & Anti-Diabetic (清热利湿 / 降血糖解毒消食利尿药)

    仁当豆 / 臭豆 / 狗果豆 / 吉林豆 — Archidendron jiringa (Jack) I.C.Nielsen (syn. Pithecellobium jiringa)

    Pinyin: Réndāngdòu / Chòudòu / Gǒuguǒdòu · Malay: Jering / Buah Jering / Jengkol · Family: Fabaceae (豆科)

    Botanical Illustration

    Energetics

    Neutral to slightly Cool (平 / 微凉)

    Flavor

    Pungent, slightly bitter, sulfurous aromatic, astringent (辛、微苦、大臭、涩)

    Meridians

    Kidney (肾), Urinary Bladder (膀胱), Stomach (胃), Spleen (脾)

    Traditional Edict

    Jering / Dogfruit. Famous pungent functional bean. Awakens Spleen, transforms dampness, unblocks urination, purges stomach heat, and controls blood sugar in diabetes (Kencing Manis).

    Cautions & Contraindications

    • CRITICAL LETHAL DJENKOLISM RENAL FAILURE WARNING: Ingesting raw/undercooked Jering leads to insoluble needle-like djenkolic acid crystalluria in renal tubules, causing severe colic, hematuria, and anuria. RESCUE PROTOCOL: Oral/IV Sodium Bicarbonate (2-4 g) to alkalinize urine (pH > 7.5) and dissolve crystals immediately.

    Clinical Applications

    • Type 2 Diabetes mellitus (postprandial glucose spike reduction via a-glucosidase/amylase inhibition), essential hypertension, hypercholesterolemia, and functional dyspepsia.

    Quality Markers

    Djenkolic Acid (S,S'-Methylenebiscysteine ~ 1.0-2.0%), Gallic Acid & Tannins (HPLC/LC-MS MHM standard)

    Mechanism & Phytochemistry

    1. Polyphenols and tannins competitively inhibit intestinal a-glucosidase and pancreatic a-amylase, blunting glycemic curves. 2. Bioflavonoids stimulate eNOS vasodilation. 3. Djenkolic acid amino acid exerts diuretic effects.

    Preparation & Dosage

    CRITICAL CULINARY PAOZHI: MUST ALWAYS BE THOROUGHLY COOKED (boiled in multiple changes of water or braised in Rendang broths) TO VOLATILIZE/DISSOLVE FREE DJENKOLIC ACID. Cooked beans in diet: 20-50 g. Dried seed pod decoction: 10-15 g.

    Appended Prescriptions

    • 1. The Sovereign Nanyang Glycemic Moderation Dish (Rendang Jering) thoroughly braised with Coconut Milk, Turmeric, and Galangal. 2. Diabetic Pod-Rind Infusion with Orthosiphon stamineus (Misai Kucing).

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    Yemama Apothecary · Petaling Jaya, Malaysia · For educational and clinical reference only