番石榴叶 / 芭乐叶 / 鸡矢果叶 — Psidium guajava L.

Pinyin: Fānshíliúyè / Bālèyè · Malay: Daun Jambu Batu / Daun Jambu Biji · Family: Myrtaceae (桃金娘科)

Energetics

Neutral to slightly Cool (平 / 微凉)

Flavor

Astringent, sour, slightly bitter (涩、酸、微苦)

Meridians

Spleen (脾), Stomach (胃), Large Intestine (大肠)

Traditional Edict

Astringes intestines to stop diarrhea, clears toxic dampness, engenders fluids to quench thirst, stops bleeding and knits tissue. Sovereign first-line household remedy for acute cirit-birit and diabetes.

Cautions & Contraindications

Potent natural astringent; discontinue immediately once acute diarrhea resolves to prevent rebound spastic constipation. Contraindicated in fecal impaction.

Clinical Applications

Acute infectious gastroenteritis (Shigella, Rotavirus, ETEC), IBS-D, Type 2 Diabetes postprandial glucose surges, periodontal gingivitis, and superficial bleeding cuts.

Quality Markers

Quercetin >= 0.50% & Guajaverin (番石榴苷) >= 1.00% (Chinese Pharmacopoeia / MHM standard)

Mechanism & Phytochemistry

1. Quercetin and guajaverin block voltage-gated calcium channels in intestinal circular smooth muscle, resolving hyperperistalsis while ellagitannins block cAMP fluid secretion. 2. Selectively inhibits maltase and a-glucosidase. 3. Rotavirus replication blockade.

Preparation & Dosage

Fresh bruised leaves boiled in water (Air Daun Jambu Batu): 15-30 g (5-10 leaves). Roasted Guava Leaf Diabetic Tea (Chao Fanshiliuye Cha): 10-20 g daily. Standardized extract: 250-500 mg.

Appended Prescriptions

1. The Sovereign Nanyang Anti-Diarrheal Decoction with Helicteres isora (Cabai Tali) and Pogostemon cablin. 2. Metabolic Glycemic Harmony Tea with Orthosiphon stamineus and Momordica charantia.

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