Scientific Name(s): Phyllanthus emblica L. Family: Euphorbiaceae.
Common Name(s): Indian gooseberry , amalaki , anwala churna , emblic myrobalan , nelli , amalakam , sriphalam , gebrau chilicher , amlabaum , amla , ziphiyu-si , shabju , amlaj , amulch , toppinelli , ngop , an mole , yeowkan tse . Emblica is one of the constituents in the Ayurvedic preparations Triphala , Hyponidd , Kalpaamruthaa , and Chyavanprash .
Uses of Emblica
Emblica exhibits strong antioxidant activity. It is one of the most important plants in the traditional Ayurvedic medical system as well as in other traditional health systems for immunomodulatory, anti-inflammatory, antiulcer, hepatoprotective, and anticancer actions. However, there is very limited clinical evidence to support the use of emblica for any indication.
There are few clinical studies to guide dosages. Diabetes/hyperlipidemia : 1 to 3 g of powdered, dried fruit was consumed daily in 30 mL of water for 21 days in 1 clinical trial. Another trial used amla 300 mg tablets (each containing 50% amla extract and 50% dextrin) 3 times per day.
Contraindications have not been identified.
Information regarding safety and efficacy in pregnancy and lactation is lacking.
None well documented.
Emblica Adverse Reactions
Research reveals little or no information regarding adverse reactions with the use of this product.
No major toxicities have been reported.
Emblica is a small to medium-sized deciduous tree native to tropical southeastern Asia. Its leaves are simple, feather-like, and closely set along the branchlets. Flowers are green-yellow, and the round, greenish-yellow fruits are smooth and hard in appearance. The fruits, which ripen in autumn and are harvested by hand, are commonly used in the Indian diet. 1 , 2 , 3 A common synonym is Emblica officinalis Gaertn.
A method of emblica preparation was described in the first century AD in Sanskrit. Records of the medicinal use of emblica also have been found in Arabic, Tibetan, and Egyptian texts, as well as in the Sidha (Indian), Ayurvedic, and Unani systems of medicine. All parts of the plant including the fruit, seed, leaves, root, bark, and flowers are used in both dried and fresh forms. In the Ayurvedic system, the amla fruit is noted for its light and dry qualities, as well as being cooling in energy. In India, the fruit is commonly eaten as a pickle. 2 , 3
The fruits contain a high concentration of ascorbic acid, which degrades with heating or cooking. In addition, they contain phenols, including ellagic acid, gallic acid, quercetin, kaempferol, corilagin, geraniin, furosin, gallotanins, emblicanins, flavonoids, glycosides, and proanthocyanidins. 4 , 5 , 6 , 7 , 8 , 9 , 10 The roots contain glycosides and tannins. 11 , 12
Most of the properties assigned to emblica are attributed to its strong antioxidant action. 8 , 13 , 14 , 15 , 16 The ascorbic acid content of the fruit has been assayed at approximately 1 g per 100 mL of fresh fruit juice and accounts for 45% to 70% of the antioxidant activity. 17 The Ayurvedic process of preparing the amla berry results in a 3-fold increase of ascorbic acid and an increase in the concentration of polyphenols. This dried fruit powder is mixed with fresh emblica juice for a few hours, and then dried and powdered again. Repeated up to 21 times, this method of fruit processing is nutritionally beneficial. 17 Other compounds having antioxidant properties include the emblicanins, gallic acid, methyl gallate, corilagin, furosin, and geraniin. 6 , 17 , 18
Emblica Uses and Pharmacology
Few quality controlled clinical trials are documented despite the widespread use of emblica in traditional health systems.Anti-inflammatory effects
Research reveals no clinical trial data on the use of emblica as an anti-inflammatory agent. However, in vitro studies using bronchial epithelial cells extracted from a patient with cystic fibrosis demonstrated inhibition of pro-inflammatory cytokine expression. 21 Inhibition of collagenase and hyaluronidase by dried emblica fruit extract using donor cartilage from osteoarthritic patients was also demonstrated in vitro. 22 Crude extracts have also induced apoptotic cell death of mature osteoclasts without affecting osteoclastogenesis, possibly via modulation of transcription factors. 23 , 24Antimicrobial effects
In vitro studies
Alcoholic and aqueous extracts of emblica showed positive results against common human pathogens, including bacteria, viruses, and fungi. Activity appears to be stronger against gram-positive bacteria, and only limited efficacy against fungi. 25 , 26 , 27 , 28 Activity against herpes simplex viruses 1 and 2 has been attributed to the phenolic content, 29 while activity against the coxsackie virus was found for phyllaemblicin B extracted from the roots of the plant. 30 , 31Animal data
Induced Klebsiella pneumoniae in mice responded in the long term (30 days) to dietary supplementation with powdered fruit. However, colonization was not prevented in the short term (15 days). 32Clinical data
Research reveals no clinical data regarding the use of emblica as an antimicrobial agent.Cancer
Much interest surrounds the potential for emblica use in treating cancer; however, there are no published clinical trials or epidemiological data.Animal data
In response to heavy metal carcinogens (arsenic, chromium, nickel), rats given emblica extracts showed a reduction in the number of chromosomal aberrations, number of damaged cells, frequency of micronuclei in bone marrow cells, free radical production, and increased cell survival. 33 , 34 , 35 , 36 Rodents fed emblica extracts showed an increase in activity of natural killer cells, antibody-dependent cellular cytotoxicity, and survival in response to tumor cells (lymphoma and mammary carcinoma). 37 , 38 , 39 In 1 of these experiments, there was no effect on tumor development, but a decrease in tumor volume was shown. 33 Cytotoxicity to tumor cells has been demonstrated by organic acid gallates and hydrolysable tannins. 7 One report has been published in which emblica had no effect in reducing lung cancer parameters in mice. 40 Emblica extracts protected irradiated mice from radiation sickness, increased the 30-day survival rate, and decreased total mortality. 41 , 42 , 43Clinical data
Research reveals no clinical trial data regarding the use of emblica in cancerous conditions. However, in vitro studies using human cancer cell lines including lung, liver, cervical, ovarian, and breast cells have been conducted. 44 , 45 , 46 , 47 Various extracts of emblica inhibited hepatocarcinogenesis as measured by parameters such as tumor incidence, enzyme measurements, and other liver injury markers. 37 , 48 , 49 , 50 , 51Dermatology
Animal experiments have been conducted, as well as in vitro studies using human skin fibroblasts demonstrating increased cell proliferation and collagen production at wound and ultraviolet B light (UBV) photo-aged sites. 52 , 53 , 54Clinical data
Limited clinical studies have been conducted using emblica extracts in combination with other agents in skin-lightening creams as an alternative to hydroquinone. 55GI effects
Alcoholic and aqueous extracts of emblica have shown protective and healing effects in induced gastric ulcers in animal experiments. 56 , 57 , 58 One experiment, however, established a biphasic effect with healing observed at lower doses of ethanolic fruit extracts and ulceration evident on histology with higher doses. 59
In vitro studies using rodent jejunum and ileum as well as in live mice show antidiarrheal and spasmolytic effects on castor oil-induced diarrhea, possibly due to muscarinic action and calcium channel blockade. 60Clinical data
Research reveals no clinical data regarding the use of emblica in gastric ulcers or diarrhea.Hepato- and renal-protective effects
Alcoholic and aqueous extracts of emblica fruits have shown hepatoprotective properties in experiments in rats. Hepatic insults include antituberculosis drugs, arsenic, ethanol, thiacetamide, carbon tetrachloride, and cyclophosphamide. The experiments demonstrated histological and/or enzymatic protective and restorative effects. A decreased severity of hepatic fibrosis was also demonstrated, and some studies included improved renal and pancreatic indices. 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71Clinical data
Research reveals no clinical data regarding the use of emblica in renal disease; however, in patients with uremia consequent to end-stage renal disease (ESRD), emblica reduced markers of oxidative stress. No effect on hepatic, renal, or diabetic indices was observed. 72Hyperlipidemia
A number of animal experiments report improved lipid profiles. 73 , 74 , 75 Flavonoid extracts from the fruits of emblica inhibited synthesis and enhanced degradation of cholesterol via increased hepatic HMG-CoA reductase. 10 Fresh emblica fruit juice administered to rabbits resulted in induced aortic plaques regressing to near normal, while serum and tissue lipids decreased, 76 and ethanol extract of emblica improved the lipid profile, as well as reduced hypertension in induced metabolic syndrome in rats. 74Clinical data
In a human clinical trial, healthy and hypercholesterolemic men (35 to 55 years of age) given emblica supplementation for 28 days experienced a decrease in serum cholesterol levels. The condition was reversible upon discontinuation of the supplement. 77 In volunteers with and without type 2 diabetes, 2 to 3 g daily of powdered, dried emblica fruit improved the lipid profile (decreased total cholesterol, low-density lipoprotein, and triglycerides; increased high-density lipoprotein) at 21 days. Only among the volunteers with diabetes was there a decrease in total lipids at the 3 g daily dose. 78Diabetes
In single- and multidose experiments, emblica decreased blood glucose levels in rats with an induced diabetic state. 13 , 14 , 15 , 73 Triphala (a mixed herbal preparation containing emblica) showed a stronger effect than emblica alone, 79 and another mixed preparation reduced blood glucose in a manner similar to that of glibenclamide. 14 Serum creatinine was reduced, and serum albumin increased within 20 days in rats fed emblica. 14 In rats with induced diabetes, neuropathic pain was reduced with supplemental emblica possibly via an antioxidative mechanism. 80 In vitro studies also suggest inhibition of alpha-amylase and glucosidase as potential mechanisms. 81 However, in another study in rats with diabetes, dried fruits did not prevent hyperglycemia despite delaying cataract progression. 82Clinical data
Decreases in fasting and 2-hour postprandial serum glucose were demonstrated in a clinical study using both healthy and type 2 diabetic volunteers. One to 3 g of powdered, dried fruit was consumed daily in 30 mL of water for 21 days. 78 In another study in patients with ESRD and uremia, no effect on diabetic indices was observed. 72Other effects
Alcohol and aqueous extracts of emblica fruit were tested for analgesic and antipyretic activity in mice. Results were similar to those of aspirin, except for response to heat pain model in which emblica had no activity. 83Antitussive
An alcoholic extract of the fruits showed a dose-dependent effect similar to that of dropropizine in cats, but was less active than codeine. 84Antivenom
An alcoholic extract of emblica roots showed neutralizing capacity against the hemorrhagic action of snake venom in mice. 85Cardiac effects
Studies in rats have demonstrated improved memory and reversal of drug-induced amnesia with the Ayurvedic preparation anwala churna. 87 , 88 Aqueous fruit extract exerted a protective effect on alcohol-induced brain mitochondrial dysfunction in rats. 89Immune
Rats exposed to noise stress for 15 days and given Triphala showed an increased neutrophil function and lowered cortisone release. 90 However, in another experiment, an aqueous extract of emblica fruits had no effect on cold stress-induced cortisone release. 91Ophthalmic
Emblica is one component of a mixed herbal eye drop formulation ( Ophthacare ) that showed activity in mild infections and inflammatory eye conditions in a clinical study; however, the quality of study methodology was limited. 92Spermatotoxicity
Sperm count, motility, and viability were increased in mice and in human sperm with ripe emblica fruit extract. 93
There are few clinical studies to guide dosage.Diabetes/hyperlipidemia
1 to 3 g of powdered, dried fruit was consumed daily in 30 mL of water for 21 days in 1 clinical trial. 78 Another trial used amla 300 mg tablets (each containing 50% amla extract and 50% dextrin) 3 times per day. 72
A dose of 3 to 6 g/day of powdered emblica has been extrapolated from a vitamin C 1 g/day dose. 36
Another report suggests a content of vitamin C 1,100 to 1,700 mg per 100 g fruit extract. 72
Information regarding safety and efficacy in pregnancy and lactation is lacking.
None well documented.
Research reveals little or no information regarding adverse reactions with the use of this product. Experiments in animals have shown no reported adverse reactions.
No major reported toxicities have been associated with the fruit. In toxicity studies in rats, no toxicity was observed in single- or longer-term–dose administration. Additionally, no detrimental effect was noted on liver or renal function. 91 No chromosomal aberrations were found following 7- and 14-day treatment regimens in rats with crude fruit extract. 48 In another experiment, no toxicity or mutagenicity were observed in rats even at the highest doses. 44
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