
DECAFFE
TEA
Caffeine is loosely bound in
tea. It dissolves in the water very quickly.
Hence its the first
thing that comes out when the tea is steeped in hot water.
Caffeine
Popular belief will tell you,
To make decaffe teas -
"_put the tea bag
or loose tea in a pot and pour the hot water
- Wait for 30 seconds
or a minute, then pour the water out.
-Then use the same tea
bag or leaf in the cup to make the tea ".
But that's not correct !
It takes about 5 minutes
brewing to remove as much as 30% of caffeine.
If that tea is
discarded and the same leaves used to brew for second time for 5
minutes -
the
'second Brew'
will have 60 - 65% caffeine.
If you have the patience to do
a third brew with the same leaves -
the caffeine content
will be about 30% of the original tea.
But still that's not
"Decaffeinated" Tea, for tea to be considered decaffeinated,
more than 90% of
caffeine should be removed.
That level of
decaffeination could only be achieved in industrial processing,
Where 95 - 98% of
caffeine is removed
Note - Decaffe teas, after
all, may not be that healthy !
To Quote a recent
research - August 2005
The Department of
Chemical Biology, College of Pharmacy, at Rutgers studied the effects
of tea, decaffeinated tea, and caffeine on UVB light-induced complete
carcinogenesis in SKH-1 mice: demonstration of caffeine as a
biologically important constituent of tea(1).
They found oral
administration of green or black tea inhibited UVB light-induced
complete carcinogenesis in the skin of SKH-1 mice(1). Green tea was a
more effective inhibitor than black tea. Oral administration of
decaffeinated green or black tea resulted in substantially less
inhibitory activity than did administration of the regular teas, and
in one experiment, administration of a high-dose level of the
decaffeinated teas enhanced the tumorigenic effect of UVB. Oral
administration of caffeine alone had a substantial inhibitory effect
on UVB-induced carcinogenesis, and adding caffeine to the
decaffeinated teas restored the inhibitory effects of these teas on
UVB-induced carcinogenesis. In additional studies, topical application
of a green tea polyphenol fraction after each UVB application
inhibited UVB-induced tumorigenesis.
The results indicate
that caffeine contributes in an important way to the inhibitory
effects of green and black tea on UVB-induced complete carcinogenesis.
|