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While I enjoy a freshly brewed cup of green
tea, there are times when I crave the fuller flavor of black tea. And why not?
Green tea may be China's national drink, but black teas are known for their
distinct flavors. Black tea from China can be sweet or spicy, with a hint of
chocolate or the sweet fragrance of orchids.
Until recently, I worried that,
by indulging my craving, I was losing out on green tea's numerous health benefits. But recent
research indicates that black tea has its own health giving
properties.
Green
or Black Tea - which is better?
Until
recently, tea research has focused on green tea. Green tea is loaded with the compound
epigallocatechin gallate (EGCg), a powerful anti-oxidant. Since
the fermentation process used to make black tea converts EGCg into other
compounds, researchers assumed black tea had less health benefits than green
tea. However, recent studies indicate the compounds contained in black tea -
theaflavins
and thearubigens - do
more than contribute to its dark color and distinctive flavor. They also
provide health benefits originally attributed solely to green tea.
It's
important to remember that tea research is still in the early stages. Jane
Higden, a research associate with the Linus Pauling Institute, states in a
recent article: "although numerous observational studies have examined
the relationships between tea consumption and the risks of cardiovascular
disease and cancer, there is no conclusive evidence that high intakes of tea
are protective in humans." Still, it looks like there is no
need to worry about depriving yourself of possible health benefits if
black tea is your beverage of choice.
Here are the results of research into black tea: Black Tea
Research
- A
long-term study by the Netherlands National Institute of Public Health and
the Environment
found a correlation between regular
consumption of black tea and reduced risk of stroke. Researchers looked at data from a study
examining the health benefits of foods that are high in
flavonoids
- phytonutrients with antioxidant benefits.
While some of the
flavonoids were obtained from fruits and vegetables, seventy percent came
from black tea.
The study looked at 552 men over a 15 year period. Researchers concluded that the flavonoids in black tea
helped reduce the production of LDL - the "bad" cholesterol that
can lead to stroke and heart attacks. Furthermore, men who drank
over four cups of black tea per day had a significantly lower risk of stroke
than men who drank only two to three cups per day.
A
separate study by Dr. Joseph Vita at Boston's School of Medicine supported
these results. For four months, sixty-six men drank four cups of either
black tea or a placebo daily. Dr. Vita concluded that drinking black tea can
help reverse an abnormal functioning of the blood vessels that can
contribute to stroke or heart attack. Furthermore, improvement in the
functioning of the blood vessels was visible within two hours of drinking
just one cup of black tea.
Finally,
a study of over 3,000 adults in Saudi Arabia - where black tea is favored
over green - found that regular consumption of the dark brew can reduce the
risk of coronary heart disease by fifty percent.
Tea graph from the Linus Pauling
Institute. Reprinted with permission.
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