|
|
 |
Green
Tea
(Camellia sinensis) |
|
| CHEMICAL
COMPOSITION |
Contains caffeine, polyphenols and an essential oil1. |
| PHARMACOLOGY |
The
polyphenols of tea strengthen the walls of blood vessels and regulate their permeability.
They protect ascorbic acid from oxidation in rat tissue homogenates because of their
antioxidant properties. It indicates an important role of green tea in human nutrition in
preventing symptoms of ascorbic acid deficiency. Green Tea polyphenols have been found to
normalise thyroid hyperfunction which induces thyrotoxicosis. Green Tea inhibits the
growth of tumors in humans especially cancers of oesophagus, stomach and intestines. Green
Tea extract has been reported to be more effective in preventing tooth decay than fluoride
compounds. This also supports the role of polyphenols in inhibiting the growth of S.mutans
and preventing the cause of caries. It also prevents the formation of stones in bladder,
liver and kidney. A spray prepared from tannins of tea cures allergies caused due to some
mites in air. Tea has also been successfully used in treating severe abdominal, intestinal
and cerebral haemorrhages. Green tea tannins or its active constituents are used in
treating toxic goitre. |
| THERAPEUTIC
USES |
It was
found that the extracts of green tea exhibited antitumour promoting activity1,
antioxidation2, antimutagenecity3,
antivirus4, anticoagulation5, and
could reduce serum cholesterol levels6 and blood pressure7. |
| REFERENCES |
- Yoshizawas et al :
Phytother. Res. 1, 44-46, 1987.
- Lee M.H. et al: Chung-Kuo
Nung yeh Hua Hsueh Hui Chih, 22, 226-231, 1984
- Kada T. et al: Mutat. Res.
150, 127-132, 1985.
- Okuda T. et al: JARQ 12,
27-32, 1978.
- Hong Rx et al : Zhongxiyi
Jiehe Zazhi, 8,621, 1988.
- Matsuda H et al:
J.Ethanopharmacol. 17, 213-214, 1986.
|
| SPECIFICATIONS: GREEN
TEA EXTRACT
(Camellia sinensis)
General
Information:
| Type of
extract |
: |
Dry
powder |
| Plant
parts used |
: |
Leaves |
| Source |
: |
Wild
crafted |
| Shelf
life |
: |
24 months
unopened |
| Storage |
: |
Keep in a
cool, dry place protected from moisture and heat |
| Active
ingredient |
: |
Polyphenols |
| Method of
analysis |
: |
HPLC/HPTLC |
Analytical
Specifications :
| Description |
: |
Greenish brown powder, hygroscopic |
| Organoleptic characters |
: |
Astringent in taste with characteristic odour |
| Loss on drying |
: |
Not more than 5% W/W |
| Lead |
: |
Not more than 10 PPM |
| Arsenic |
: |
Not more than 2 PPM |
| Heavy metals |
: |
Not more than 20 PPM |
| Assay |
|
|
Polyphenols content on dry basis by
HPLC/HPTLC |
: |
Not less than 60% W/W |
| Microbiological profile |
: |
|
| Total bacterial count |
: |
Not more than 3000 CFU/gm |
| Yeast and moulds |
: |
Not more than 100 CFU/gm |
| E.coli |
: |
Absent |
| S.aureus |
: |
Absent |
| Salmonella typhi |
: |
Absent |
| Pseudomonas aeruginose |
: |
Absent |
* Green Tea extract is also available with
>40% w/w and >80% w/w
Polyphenols |
|
|
