Haritaki / Black Myrobalan (Triphala representative)

Terminalia chebula

CombretaceaeIndian subcontinent (India, Nepal, Sri Lanka, Bangladesh), Southeast Asia, and southwestern China

Description

overall appearance

Medium to large deciduous tree reaching 20–30 m with a spreading crown 5–15 m wide; known as the 'King of Herbs' in Tibetan medicine and considered the most important plant in the Ayurvedic materia medica by some traditions.

roots

Deep taproot with lateral spreading roots; bark is thick, brown, and fissured longitudinally; tannin-rich

stem

Trunk 60–120 cm in diameter; bark dark brown to grayish, rough and deeply furrowed; branches spreading; young shoots are rusty-hairy

leaves

Ovate to elliptic, 7–18 cm long and 4.5–9 cm wide; entire margins; opposite or sub-opposite; hairy below when young; long petiole 1–3 cm with 2 prominent glands at apex

flowers

Small, monoecious, dull white to pale yellow, 5-petaled; arranged in terminal spike-like racemes or panicles 5–12 cm long; malodorous; appearing before or with new leaves

fruits/seeds

Drupe 2–4 cm long; ovoid to elliptic; yellowish to blackish-brown when ripe; 5 longitudinal ridges; extremely astringent, sour, bitter pulp; one hard pyrene with oily kernel; classified into 7 varieties in Ayurveda based on taste profile

Active Compounds

Tannins: chebulinic acid, chebulagic acid (primary bioactives; 30–60% of dry fruit weight), corilagin, punicalaginEllagitannins: terchebulin, terflavin A and B, chebulaninGallotannins: 1,2,3,4,6-pentagalloylglucose (PGG), trigalloylglucosePhenolic acids: gallic acid, ellagic acid, chebulic acidTriterpenoids: arjunolic acid, chebulosidic acidAnthraquinones: sennoside A and B (mild laxative activity)Flavonoids: luteolin, rutin, quercetinPolyols: shikimic acid, quinic acid

Traditional Uses

Ayurveda: Haritaki — primary component of Triphala alongside Phyllanthus emblica (amla) and Terminalia bellirica (vibhitaki); used for digestion, detoxification, and rejuvenation
Tibetan medicine (sowa rigpa): the most important medicinal plant; depicted in the hands of the Medicine Buddha; used in thousands of formulas
Ayurvedic laxative and colon cleanser (virechana): unripe fruit is stronger laxative; ripe fruit is gentler tonic
TCM: Ke Zi (He Zi) — astringent for chronic diarrhea, dysentery, and prolapse; antitussive
Traditional treatment for diabetes, obesity, and digestive disorders across South and Southeast Asian medicine
Ayurvedic eye wash and treatment for conjunctivitis, cataracts, and vision improvement
Rasayana (longevity tonic): daily consumption of haritaki associated with anti-aging benefits in classical Ayurveda
Wound healing and oral health: gargle and mouthwash for aphthous ulcers, gingivitis, and toothache

Modern Applications

Antimicrobial: chebulic acid, chebulagic acid, and PGG highly active against MRSA, E. coli, H. pylori, and Candida; minimum inhibitory concentrations in μg/mL range
Antiviral: chebulagic acid and PGG inhibit HIV-1 integrase, HSV-1 and 2 replication; inhibit influenza neuraminidase
Antidiabetic: chebulagic acid inhibits intestinal sucrase and maltase; reduces post-prandial glucose spikes; improves GLUT-4 translocation in fat cells
Anticancer: chebulinic acid and PGG induce apoptosis in HeLa, MCF-7, and colon cancer cells via mitochondrial pathway
Cardioprotective: arjunolic acid reduces oxidative stress in myocardial ischemia; chebulagic acid inhibits LDL oxidation
Neuroprotection: chebulinic acid reduces Aβ aggregation and tau hyperphosphorylation in AD models; anti-inflammatory via NF-κB inhibition
Triphala (with amla and vibhitaki): most-studied Ayurvedic compound; multiple human trials confirm benefits for constipation, weight management, and dyslipidemia
Antifungal: strong activity against dermatophytes; clinical study of topical haritaki cream showed effectiveness in tinea infections

⚠️ Safety Information

Contraindications

Pregnancy: anthraquinone content has oxytocic activity; contraindicated especially in first trimester
Severe dehydration or diarrhea: laxative anthraquinone content may worsen dehydration; avoid during acute diarrhea
Concurrent use with tannin-sensitive medications: tannins bind to many drugs, reducing absorption
Wasting diseases and malnutrition: excessive use depletes nutrients; tradition warns against overuse without supportive nutrition

Side Effects

Dose-dependent laxative effect: higher doses (>6 g/day) may cause diarrhea and cramping
Electrolyte imbalance (hypokalemia) with chronic high-dose use due to anthraquinone stimulant laxative activity
Reduced absorption of iron, calcium, and protein due to tannin binding (take separately from meals)
Hypoglycemia with concurrent antidiabetic medication

Drug Interactions

Iron supplements and nutritional minerals: tannins strongly chelate iron, zinc, and calcium; separate by 2–4 hours
Antibiotics (tetracyclines, fluoroquinolones): tannins reduce oral bioavailability by chelation; separate by 2 hours
Antidiabetics: additive hypoglycemic effect; monitor blood glucose
Anticoagulants (warfarin): ellagic acid may have antiplatelet activity; monitor INR