Amla / Indian Gooseberry

Phyllanthus emblica

PhyllanthaceaeIndian subcontinent, Sri Lanka, Southeast Asia, southern China; widely cultivated in tropical Asia

Description

overall appearance

Medium-sized deciduous tree 8–18 m tall with spreading, feathery crown; thin, peeling, gray-brown bark; small leaves give the tree a light, airy appearance. One of the most revered plants in all of Ayurveda; considered sacred to the goddess Lakshmi.

roots

Deep taproot with extensive lateral root system; light brown bark; contain tannins and ellagic acid

stem

Trunk 20–50 cm in diameter; smooth to slightly flaky bark; grayish-green to brown; branchlets deciduous with leaves

leaves

Linear-oblong, feathery, resembling compound leaves but are simple; 10–13 mm long and 2–4 mm wide, densely arranged alternately on deciduous branchlets; light green; fall with the branchlets in dry season

flowers

Small, greenish-yellow flowers 3–4 mm; dioecious (separate male and female); fascicled in leaf axils; inconspicuous

fruits/seeds

Globose, fleshy drupe 1.5–2.5 cm in diameter; pale green to yellowish when ripe; extremely sour, astringent taste; deeply ribbed with 6 faint furrows; one hard 6-loculed pyrene with 6 seeds; among the highest natural sources of vitamin C (600–900 mg/100 g fresh weight)

Active Compounds

Hydrolyzable tannins: emblicanin A and B (unique to amla; account for stable vitamin C activity), phyllemblin, punigluconinGallotannins and ellagitannins: geraniin, corilagin, chebulanin, 1,6-di-O-galloyl-β-D-glucoseAscorbic acid (vitamin C): 600–900 mg/100 g fresh fruit; most thermostable form due to tannin chelationPolyphenols: quercetin, kaempferol, rutin, myricetin, ellagic acid, gallic acidCurcuminoids: not present; however, chebulinic acid acts similarlyAlkaloids: phyllantine, phyllemblin, zeatinPectin and mucilaginous polysaccharidesFixed oils: linolenic acid (63%), linoleic acid (10%), oleic acid (7%) in seed

Traditional Uses

Ayurveda: primary ingredient in Triphala, Chyawanprash, and Brahma Rasayana; the most important single fruit in Ayurveda
Rasayana (rejuvenating tonic): Charaka classifies amla as the best among all rejuvenatives for general health and longevity
Ayurvedic treatment for hyperacidity, peptic ulcer, and gastritis; cooling effect on pitta dosha
Traditional hair care: amla oil massaged into scalp to promote hair growth, reduce graying, and prevent hair fall
Ayurvedic treatment for cataract prevention and vision improvement; eyewashes with amla water in traditional opthalmology
Blood purifier and anemia treatment in Ayurvedic and Unani medicine
Traditional treatment for diabetes in South and Southeast Asian folk medicine
Tibetan medicine (sowa rigpa): amla used in Triphala as cornerstone of digestive and aging therapeutics

Modern Applications

Antioxidant: emblicanin A and B shown to be more potent than vitamin C alone in ORAC assay; synergistic chelation of tannins stabilizes ascorbic acid activity at high temperatures
Cholesterol-lowering: double-blind RCT (Antony et al., 2008) showed 500 mg amla extract reduced total cholesterol, LDL, VLDL, and triglycerides significantly
Anti-atherogenic: reduces PCSK9 expression and LDL oxidation; human study showed reduced c-reactive protein and fibrinogen levels
Antidiabetic: ellagic acid and tannins inhibit α-glucosidase and improve post-prandial glucose; pilot RCT showed significant reduction in fasting glucose and HbA1c at 500 mg/day
Hepatoprotection: gallic acid and geraniin protect against paracetamol and ethanol-induced liver damage; amla shows hepatoprotective activity comparable to silymarin in some models
Anti-cancer: ellagic acid and emblicanin induce apoptosis in cancer cell lines; inhibit angiogenesis and metastasis in animal models
Gastroprotective: mucilaginous polysaccharides and tannins reduce acid secretion, protect gastric mucosa; clinical evidence in GERD and peptic ulcer
Hair growth: topical amla oil promotes anagen phase; DHT-5α reductase inhibition demonstrated for androgenic alopecia

⚠️ Safety Information

Contraindications

Anticoagulation therapy: high vitamin C and tannin content may affect INR; monitor warfarin patients closely
Iron overload conditions (hemochromatosis): high vitamin C dramatically increases iron absorption; avoid supplemental doses
Kidney stones (calcium oxalate): high oxalate content in large doses; monitor with history of oxalate nephrolithiasis
Pre-surgical period: discontinue 2 weeks before surgery; antiplatelet activity and vitamin C may affect surgical outcomes

Side Effects

Gastrointestinal discomfort (increased stool frequency, mild diarrhea) at doses above 1 g/day extract
Increased iron absorption at high doses — beneficial for anemia but problematic in iron overload
Hypoglycemia when combined with antidiabetics
Skin hyperpigmentation with long-term high-dose internal use (rare)

Drug Interactions

Anticoagulants (warfarin): high vitamin C content may enhance or reduce warfarin effect depending on dose; monitor INR
Iron supplements and tetracycline antibiotics: significantly increases iron absorption; separate dosing by 2+ hours
Antidiabetics (insulin, metformin): additive hypoglycemic effect; monitor blood glucose
Antacids (aluminum, magnesium hydroxide): tannins may bind to antacid minerals; separate by 2 hours