| Habitat |
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| The tree is
commonly found in the mixed deciduous forests of India
ascending to 4,500 ft. in the hills. |
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| Morphology
Description (Habit) |
E.officinalis
is a small or medium-sized deciduous tree with smooth, greenish
grey, exfoliating bark. The leaves are feathery with small narrowly
oblong, pinnately arranged leaflets. The fruits are depressed,
globose, fleshy and obscurely 6-lobed, containing 6 trigonous seeds.
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| Principal
Constituents |
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Amla is highly
nutritious and is an important dietary source of Vitamin C, minerals
and amino acids. The edible fruit tissue contains protein
concentration 3-fold and ascorbic acid concentration 160-fold
compared to that of the apple. The fruit also contains considerably
higher concentration of most minerals and amino acids than apples.
Glutamic acid, proline, aspartic acid, alanine, and lysine are 29.6,
14.6, 8.1, 5.4 and 5.3% respectively of the total amino acids. The
pulpy portion of fruit, dried at 100- and freed from the nuts
contains: gallic acid 1.32%, tannin, sugar 36.10%; gum 13.75%;
albumin 13.08%; crude cellulose 17.08%; mineral matter 4.12% and
moisture 3.83%. Amla fruit ash contains chromium, 2.5 ; zinc, 4; and
copper, 3 ppm. Presence of chromium is of therapeutic value in
diabetes. Fruit also contains phyllemblin and curcuminoides. The
fruit contained 482.14 units of superoxide dismutase/g fresh weight,
and exhibited antisenescent activity. The seed oil contains 64.8%
linolenic acid and closely resembles linseed oil1.
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| Pharmacology |
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Aqueous extracts of E. officinalis
fruit and ascorbic acid equivalent to that in the fruit extract were
fed to albino mice for 7 consecutive days, followed by
intraperitoneal injection of Pb(NO3)2 or Al2(SO4)3.18H2O. The
ability of the crude fruit extract and ascorbic acid to counteract
the toxic effects induced by these metal salts in hepatic and renal
tissues of the animals were studied. Histopathological observations
revealed that both the fruit extract and ascorbic acid could prevent
the toxic effects induced by both metals, but the extract was more
effective than ascorbic acid alone2. Feeding of Amla to
the hypercholesterolemic rabbits for 12 weeks showed a two pronged
effect, its feeding increased the lipid mobilization and catabolism
and retarded the deposition of lipids in the extrahepatic tissues.
Feeding of E. officinalis initially raised the plasma lipids
and cholesterol levels but by the end of 12 weeks, their levels were
reduced significantly below the levels in the control group. Lipid
levels in the liver were also significantly lowered. Though lipid
levels in the aorta increased during this period the increase was
much less in Amla fed animals as compared to the control group. The
degree of atherosclerosis at the end of 12 weeks of Amla feeding was
much lower when compared to the control group3.
The relative effects of a crude
aqueous extract from the fruit and an equivalent amount of synthetic
ascorbic acid (vitamin C) in reducing the clastogenic action of
cesium chloride (CsCl) in vivo on mice bone marrow cells were
compared. CsCl-induced chromosomal aberrations were observed in the
mice 24 hours after exposure in frequencies that were directly
proportional to the dose administered even after treatment for seven
days. On the other hand, oral administration of either ascorbic acid
or E. officinalis extract for seven days prior to exposure to
CsCl for 24 hours reduced the frequency of chromosomal aberrations.
This protective action of orally-administered E. officinalis
extract against damage induced by CsCl has been reported to be of
considerable importance in view of the possible entry of Cs. into
edible plants from soil and subsequently into the food chain
following radioactive fallout4.
E. officinalis juice was administered at a dose of 5ml/kg
body weight per rabbit per day for 60 days. Serum cholesterol, TG,
phospholipid and LDL levels were lowered by 82 percent, 66 percent,
77 percent and 90 percent, respectively. Similarly, the tissue lipid
levels showed a significant reduction following E. officinalis
juice administration. Aortic plaques were regressed. E.
officinalis juice treated rabbits excreted more cholesterol and
phospholipids, suggesting that the mode of absorption was affected. E.
officinalis juice is an effective hypolipidemic agent and can be
used as a pharmaceutical tool in hyperlipidaemic subjects5.
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| Clinical
Studies |
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Clinical studies were conducted to investigate the effect of
Amalaki in amlapitta (gastritis syndrome). Amalaki churna was given
in 20 cases in a dose of 3g., thrice a day for seven days. The drug
was found effective in 85 per cent of cases. Cases of
hyperchlorhydria with burning sensation in abdominal and cardiac
regions and epigastric pain were benefited6.
The fruit was used successfully in the treatment of human scurvy
in the Hissar famine of 1939-407. The Therapeutic
efficacy of Amalaki in cases of dyspepsia was evaluated and the
results clearly indicate the efficacy of E.o. in relieving the
dyspeptic symptoms as well as in promoting healing of ulcers8.
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| Indications |
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The fruit is acrid,
cooling, refrigerant, diuretic and laxative. The dried fruit is
useful in hemorrhage, diarrhea and dysentery. In combination with
iron, it is used as a remedy for anemia, jaundice and dyspepsia.
Amla fruits are anabolic, anti-bacterial and resistance building.
They possess expectorant, cardiotonic, antipyretic, antioxidative,
antiviral and anti-emetic activities. They are also used in the
treatment of leukorrhea and atherosclerosis.
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