What are different green teas made of exactly, and are they totally natural? Green, black and oolong teas come from the Camellia sinensis plant. Green tea consists of leaves that haven’t been fermented so they contain the highest level of antioxidants. For

2. What Is Green Tea?
What are different green teas made of exactly, and
are they totally natural? Green, black and oolong
teas come from the Camellia sinensis plant. Green
tea consists of leaves that haven’t been fermented
so they contain the highest level of antioxidants.
For example, flavonoid antioxidants account for
about 30 percent of the dry weight of green tea
leaves. (3)
Some of the antioxidants and healing compounds
found in green tea include polyphenols, catechins
and various other types of flavonoids — the same
anti-aging compounds found in things like red wine,
blueberries and dark chocolate. Despite that it does
contain small amounts of caffeine, green tea
consumption has been associated with more health
benefits than even many of the healthiest foods
available to us. Studies have found that the benefits
of green tea are due to the fact green tea contains
more healing compounds than many other herbs,
spices, fruits and vegetables, truly making it a
powerful “superfood.”

3. 7 Benefits of Green Tea

4. What does green tea do once you drink it that
promotes better health and longevity? The Mayo
Clinic summarized some of the findings about green
tea in 2008. A combination of epidemiological and
population studies seem to suggest that drinking tea
may:
 Reduce atherosclerosis and risk of heart disease
 Lower blood pressure
 Reduce cholesterol levels
 Reduce inflammation in arthritis cases
 Improve bone density
 Improve memory
 Prevent cancer
Among many other benefits of green tea, below is
more about some of the major perks associated with
drinking green tea:
1. Helps Protect Heart Health
A great deal of evidence from randomized controlled
trials suggests that consumption of flavan-3-ols and
anthocyanidin antioxidants, the types found in green
tea, is beneficial for metabolic and cardiovascular
health. (5) When it comes to preventing many of the
risk factors for heart disease, such as having high

5. blood pressure or cholesterol levels, some evidence
shows that green tea contains 10 beta-blocking
compounds, seven calcium channel blockers and 16
diuretic compounds. It also has more ACE-inhibiting
properties than many other plant foods that are
commonly consumed, which helps increase the
amount of blood your heart pumps and lowers blood
pressure.
According to a study published in the
journal Chinese Medicine, many of the beneficial
biological effects of flavonoids on heart health seem
to be due to cell-signaling effects that lower
inflammation. (6) Not only do flavonoids have anti-
inflammatory capabilities, but they’re also
antithrombogenic, antidiabetic, anticancer and
neuroprotective compounds.
2. May Help Prevent Alzheimer’s or
Memory Loss
In 2004, scientists at the University of Newcastle
studied the effects of black and green tea on
Alzheimer’s disease. In laboratory studies, both
teas prevented the breakdown of acetylcholine, the
neurotransmitter strongly linked with memory. The

6. teas also inhibited enzymes known as BuChE and
beta-secretase. These enzymes are found in protein
deposits found in the brain of Alzheimer’s patients.
Japanese researchers published a study on green
tea and its effect on the beta-amyloid protein
plaques found in Alzheimer’s disease in the April
2008 issue of the Journal of Nutritional Biochemistry.
The protein plaques associated with Alzheimer’s
disease increase brain cell damage and death due
to oxidative stress. The researchers found that green
tea catechins reduced the level of damaging free
radicals in the brains of rats. The green tea rodents
showed much less plaque-induced deficits in
memory compared to rodents that didn’t receive
green tea and those that were infused with beta-
amyloid proteins.
Scientists have also discovered that the antioxidants
flavonoids may also protect the brain from oxidative
stress. The scientists extrapolated that a human
would need to drink about three liters of liquid
infused with 0.5 percent of the catechins to get
similar effects. However, because humans ingest
other antioxidants in the form of vitamins and plant

7. 3. Helps Protect Brain Cells From Free
Radical Damage
In 2007, Salk Institute researchers found that the
flavonoid epicatechin, found in blueberries, cocoa,
grapes and tea, improved memory ability in mice.
The researchers found that epicatechin seemed to
promote blood vessel growth in the brain.
In 2009, King’s College researchers found that
epicatechin may protect brain cells through
mechanisms unrelated to its antioxidant ability, as
epicatechin is one of the few flavonoids that can
cross the blood-brain barrier. The King’s College
researchers reported that somehow epicatechin
protects brain cells from the negative effects of beta-
amyloid plaques, although the exact mechanism of
how this works is still not entirely know.

8. 4. May Help Prevent Diabetes or Insulin
Resistence
Certain studies indicate that intake of flavan-3-ols
and/or anthocyanidins found in green tea may
improve glycemic control and help normalize blood
sugar levels. Due to its anti-inflammatory
properties, green tea is believed to be beneficial for
those who are at-risk or diagnosed with type 2
diabetes. Green tea’s catechins, especially EGCG,
appear to have anti-obesity and antidiabetic effects.
5. Promotes Bone Health
University of Hong Kong researchers published a
study in the August, 2009 Journal of Agricultural and
Food Chemistry concerning green tea and bone
health. When the bone cells of rats were exposed to
green tea catechins, EGC in particular stimulated an
enzyme that promotes bone growth by 79 percent.
The catechins also increased bone mineralization
and weakened the activity of cells that reabsorb
bone rather than form it.

9. 6. Prevents Eye Disease and Protects
Vision
One study that was published in the February 2010
issue of the Journal of Agricultural and Food
Chemistry investigated the effects of catechins on
eye diseases and found that consuming more
catechins may help protect the eyes from oxidative
damage and vision loss. Scientists involved in the
study found evidence that catechins can pass from
the digestive tract of rodents to the tissues of their
eyes and reduce oxidative stress for up to 20 hours
after ingestion.

10. 7. May Reduce Your Appetite
Does green tea really burn fat, and will drinking
green tea help you lose more weight? According to
some research findings, consuming antioxidants
found in green tea, especially catechins and the
compound called EGCG, may promote metabolic
health and modestly prevent weight gain. When
11 studies and articles were included in one 2009
meta-analysis that was published in the International
Journal of Obesity, researchers found that
Green Tea Nutrition Facts

11. Flavan-3-ols, the type of flavonoids found in green
tea and other teas, provide many of the anti-aging
effects of green tea. Catechins in various types of
teas are the polyphenols that seem to have the most
potent antioxidant effects, according to Natural
Standard, the leading and most respected reviewer
of herbal compounds. Specific flavan-3-ols found in
green tea include monomers (catechins) called:
 epicatechin
 epigallocatechin
 gallocatechin
 and gallate derivatives.
A well-known compound found in green tea is
called EGCG (which stands for epigallocatechin-3-
gallate). EGCG is associated with enhanced
metabolic activities that may prevent weight gain or
assist with weight maintenance. Some of the ways
that EGCG seems to work is by
boosting thermogenesis (the body producing heat
by using energy) and suppressing appetite, although
not every study has found evidence that these
effects are substantial.

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