"Green tea undergoes a controlled fermentation which changes the flavor
and color, radically altering healthful natural occuring compounds.
Black tea does not have the beneficial effects of green tea and may, on
the contrary , be detrimental to health as green tea is helpful"
This is a surprising statement. I had always believed that black tea
had less healthful than green tea, but NEVER found that it could be
harmful.
Any information will be helpful.
According to info from the NIH's web page, black tea does not appear
to increase risk of cancer, and it may also reduce it, though if it
does, not as much so as green. The curing reduces the quantity of
antioxidant polyphenols (e.g., EGCG, EC, ECG, EGC) which reduce risk
of cancer, but there is no indication that consumption og black teas
_increases_ carcinogenesis.
(The documents I found are
Goldbohm et al: "Consumption of Black Tea and Cancer Risk: a
Prospective Cohort Study", J Natl Cancer Inst, issue 2,
1996;88:93-100,
Yang et al: "Polyphenols As Inhibitors of Carcinogenesis",
Environmental Health Perspectives 105, Supplement 4, June 1997:], and
"NIEHS News", Environmental Health Perspectives 105-8, August
1997.)
N.
--
nx...@po.cwru.edu, RFVC Moderation Team
Last night I met upon the stair
A little man who wasn't there.
He wasn't there again today.
Gee how I wish he'd go away!
The studies that show that black tea causes problems have been local or
regional - while an association was found in one place, this was not a
universal association. This supports the notion that it is some factor
other than the tea itself. The typical scientific study is based on a
alpha cutoff level of 0.05, which means that there is a five percent
chance that the results which were deemed significant were in fact
caused by random fluctuations or sampling error. In epidemeology, most
studies are not planned experiments, which further increases the chances
that an uncontrolled factor is present.
I do not believe that there is enough evidence to conclude that tea in
moderation is a cause of serious health problems. Caffeine may cause
problems with pregnancy, and complicate conditions like panic disorder
and some heart conditions. And black tea does have some beneficial
compounds, although different than green tea and in lower amounts.
Jonathan
Allan Gorochow wrote:
>
> While perusing a favorite herb news group, I was surprised when a
> Herbologist posted this statement:
>
> "Green tea undergoes a controlled fermentation which changes the flavor
> and color, radically altering healthful natural occuring compounds.
> Black tea does not have the beneficial effects of green tea and may, on
> the contrary , be detrimental to health as green tea is helpful"
>
So what? Even the health nuts I know indulge in "unhealthy" behaviors. The
epitome of this came when a promiscuous male homosexual acquintance of mine who
liked sex in public restrooms (always with a condom, of course) lectured me on
his "healthy" lifestyle because he was a vegetarian & I'm not. Who cares if
tea is mildly unhealthy? Obviously black tea isn't instantly fatal. It isn't
crippling or fatal after decades of exposure. Drinking tea is safer than
skiing.
teneb...@aol.com
--------------------------
Yes, I get all my opinions from pop singers
--------------------------
>The studies that show that black tea causes problems have been local or
>regional - while an association was found in one place, this was not a
>universal association. This supports the notion that it is some factor
>other than the tea itself. The typical scientific study is based on a
>alpha cutoff level of 0.05, which means that there is a five percent
>chance that the results which were deemed significant were in fact
>caused by random fluctuations or sampling error. In epidemeology, most
>studies are not planned experiments, which further increases the chances
>that an uncontrolled factor is present.
The parts of China where tea is consumed and there is a higher than
average cancer rate is where the food is smoked, cured, dried, salted.
---
Jim
"The following is a list of articles and research that I have compiled over the
last year (or so). I presented this material to the Fircrest City Council in
hopes of eliminating fluoride from their water supplies - a dangerous act that
they've done for over forty years."
I have not read the other 20 pages but 1) dentists would be a lot busier
without fluoride and they promote its use. and 2) fluoride is a poison in large
quantities - babies and small children can be poisoned by injesting too much
tooth paste (Antidote is milk and get them to the hospital).
Hope that sheds more light on the question.
J. Salkowitz