Āmalakī (Indian Gooseberry)
Emblica officinalis Gaertn. (syn. Phyllanthus emblica Linn.) • Family: Euphorbiaceae
1. General botanical profile
Classical heritage: A core constituent of Triphalā alongside Harītakī and Bibhītaka, celebrated as a potent Rasāyana and Vayaḥsthāpana herb. Caraka places it in the Virecanopaga and Vayaḥsthāpana Mahākaṣāyas, and Suśruta lists it in the Parūṣakādi, Triphalādi and Āmalakyādi gaṇas. It has five of the six tastes, lacking only salt (Lavaṇa).
Tree & trunk: Small to medium deciduous tree 9–12 m tall with a crooked trunk, spreading branches and grey bark that exfoliates in small irregular patches.
Foliage & bloom: Leaves simple, alternate, linear-oblong, subsessile, 10–20 cm long, tightly set along branchlets and looking feathery and pinnate. Flowers small, pale yellowish, in axillary fascicles.
Fruit berry: Globose, fleshy berry about 2 cm across; smooth, pale yellow when ripe, with 6 vertical striations.
Phenology: Flowers March to May; fruits October to February; the tree is leafless in hot weather.
Key synonyms: Dhātrī (nourishes like a mother), Vayasthā (preserves youth), Vṛṣyā (aphrodisiac), Śrīphala (enhances luster), Amṛtā (nectar-like), Śiva (auspicious), Tiṣyaphalā (fruits in the Pauṣa month), Jātīphalarasa (praised fruit juice).
Vernacular names: Hindi: Āmalā, Āṁvalā; Gujarati: Āṁbaḷā, Āmalā; Marathi: Āvaḷe, Āvaḷī; Bengali: Āmalā; Tamil: Nelli maram, Nellikāya; Telugu: Usarikāya; Kannada: Nelli; Malayalam: Nelli; Oriya: Amlā; Punjabi: Āmalā, Ambulā; Rajasthani: Āṁvalā; English: Embelic Myrobalan, Indian Gooseberry.
2. Ingredients & phytochemicals
Key ingredient (part used): Fruit (fresh and dried pulp) of Āmalakī (Emblica officinalis Gaertn.); seeds, flowers, roots and bark are also used.
Phytochemical profile
- Vitamins & organic acids: Extremely rich in Vitamin C (ascorbic acid); also carotene, nicotinic acid, riboflavin, pectin and D-galacturonic acid.
- Complex carbohydrates: D-glucose, D-fructose, myoinositol, and arabinosyl, xylosyl, rhamnosyl, glucosyl, mannosyl and galactosyl residues.
- Tannins & polyphenols: Embicol, mucic acid, phyllemblic acid, phyllembin, leucodelphinidin, procyanidin, 3-O-gallated prodelphinidin, gallic acid, ellagic acid and glucogallin.
- Triterpenoids (root): Lupeol, oleanolic aldehyde and O-acetyl oleanolic acid.
3. Rasa pañcaka (Ayurvedic energetics)
Seed kernel: the potency (Vīrya) of the inner seed kernel matches that of the outer fruit pulp.
4. Doṣha karma (action on humors)
| Doṣa target | Taste & energetic mechanism | Physiological effect |
|---|---|---|
| Vāta Śamana | Sour taste (Amla Rasa) | Counteracts coldness, dryness and irregular nervous movement. |
| Pitta Śamana | Sweet taste (Madhura Rasa) & cold potency (Śīta Vīrya) | Cools inflammatory heat, burning sensations and metabolic acidity. |
| Kapha Śamana | Dry quality (Rūkṣa Guṇa) & astringent taste (Kaṣāya Rasa) | Scrapes excess moisture, reduces phlegm and clears fluid congestion. |
5. Karma & therapeutic applications
Classical internal applications
- Hemorrhagic disorders (Raktapitta): Prime remedy for internal and external bleeding, owing to cold potency and sweet/astringent properties.
- Metabolic & urinary (Prameha): Regulates fluid balance and sugar metabolism.
- Hematological & hepatic: With iron preparations, dried pulp helps in anemia (Pāṇḍu), jaundice (Kāmalā) and dyspepsia.
- Gastrointestinal & dysenteric: Fresh juice is a digestive stimulant, refrigerant, diuretic and aperient; acute bacillary dysentery is controlled with Āmalā sherbet and fresh lemon juice.
- Polyherbal decoction: Āmalakī, Dāruharidrā, Guḍūcī and Yaṣṭimadhu for rhinorrhoea with copious discharge, diabetes and vaginal discharge (Pradara).
Other plant parts
- Fruit exudation: Liquid from incisions on the fresh fruit is applied externally for eye inflammation.
- Flowers: Cooling, refrigerant and mild aperient.
- Roots & bark: Strongly astringent.
- Seeds: Used for asthma, bronchitis and biliousness.
- Hair & scalp: Dried pulp is used in hair dyes, inks and as a natural scalp shampoo; the fixed fruit oil promotes hair growth.
Pharmacological actions reported in modern studies
- Antisenescent & cytoprotective: Contains superoxide dismutase (482.14 units/g fresh weight); antisenescent, desmutagenic and anti-clastogenic.
- Radiation protection & antitumour: Aqueous fruit extracts protect against radiation-induced chromosomal damage; anti-mutagenic, anti-carcinogenic and immunomodulatory.
- Heavy metal protection: Counteracts cytotoxic effects of prolonged heavy metal exposure in industrial settings.
- Metabolic & diabetes support: Fruit ash contains chromium (2.5 µg/g), zinc (4 µg/g) and copper (3 µg/g); chromium assists carbohydrate metabolism and insulin sensitivity.
6. Shelf life & storage stability
- Vitamin C concentration: Fresh juice has nearly 20 times the Vitamin C of orange juice; one fruit equals one or two oranges in antiscorbutic value.
- Protective tannin complex: Tannins with gallic acid, ellagic acid and glucose protect ascorbic acid from rapid oxidation, preserving potency in fresh and dry powder states.
- Dried fruit powder: Retains 80% of its Vitamin C (loses only 20%).
- Brine preservation: Vitamin C remains stable for up to 375 days under refrigeration.
7. Dosage & method of administration
- Fruit powder (Cūrṇa): 5 to 10 grams daily with water or honey.
- Targeted therapeutic dose: 10 grams of powder with honey for specific inflammatory and metabolic conditions.
- Fresh juice (Svarasa): 10 to 20 mL daily.
- Classical formulations: Essential constituent of Triphalā Cūrṇa, Cyavanaprāśa, Vayaḥsthāpana decoctions and Āmalakyādi Gaṇa.