Green tea is more than just liquid.
Many of the plant
compounds in the tea leaves do make it into the final drink, which
contains large amounts of important nutrients (1).
Tea is rich in polyphenols that have effects like reducing inflammation and helping to fight cancer
Green tea is about 30 percent polyphenols by weight, including large
amounts of a catechin called EGCG. Catechins are natural antioxidants
that help prevent cell damage and provide other benefits.
These
substances can reduce the formation of free radicals in the body,
protecting cells and molecules from damage. These free radicals are
known to play a role in aging and all sorts of diseases.
10 Proven Benefits of Green Tea
Green tea is the healthiest beverage on the planet.
It is loaded with antioxidants and nutrients that have powerful effects on the body.
These include improved brain function, fat loss, a lower risk of cancer and many other impressive benefits.
Below are 10 health benefits of green tea that are supported by studies.
Green tea is more than just liquid.
Many
of the plant compounds in the tea leaves do make it into the final
drink, which contains large amounts of important nutrients (1).
Tea is rich in polyphenols that have effects like reducing inflammation and helping to fight cancer.
Green
tea is about 30 percent polyphenols by weight, including large amounts
of a catechin called EGCG. Catechins are natural antioxidants that help
prevent cell damage and provide other benefits.
These substances
can reduce the formation of free radicals in the body, protecting cells
and molecules from damage. These free radicals are known to play a role
in aging and all sorts of diseases.
EGCG (Epigallocatechin
Gallate) is one of the most powerful compounds in green tea. It has been
studied to treat various diseases and may be one of the main reasons
green tea has such powerful medicinal properties (2).
Green tea also has small amounts of minerals that are important for health.
Try
to choose a higher quality brand of green tea, because some of the
lower quality brands can contain excessive amounts of fluoride (3).
That being said, even if you choose a lower quality brand, the benefits still far outweigh any risk.
10 Proven Benefits of Green Tea
Green tea is the healthiest beverage on the planet.
It is loaded with antioxidants and nutrients that have powerful effects on the body.
These include improved brain function, fat loss, a lower risk of cancer and many other impressive benefits.
Below are 10 health benefits of green tea that are supported by studies.
Green tea is more than just liquid.
Many
of the plant compounds in the tea leaves do make it into the final
drink, which contains large amounts of important nutrients (1).
Tea is rich in polyphenols that have effects like reducing inflammation and helping to fight cancer.
Green
tea is about 30 percent polyphenols by weight, including large amounts
of a catechin called EGCG. Catechins are natural antioxidants that help
prevent cell damage and provide other benefits.
These substances
can reduce the formation of free radicals in the body, protecting cells
and molecules from damage. These free radicals are known to play a role
in aging and all sorts of diseases.
EGCG (Epigallocatechin
Gallate) is one of the most powerful compounds in green tea. It has been
studied to treat various diseases and may be one of the main reasons
green tea has such powerful medicinal properties (2).
Green tea also has small amounts of minerals that are important for health.
Try
to choose a higher quality brand of green tea, because some of the
lower quality brands can contain excessive amounts of fluoride (3).
That being said, even if you choose a lower quality brand, the benefits still far outweigh any risk..
Green tea does more than just keep you awake, it can also make you smarter.
The key active ingredient is caffeine, which is a known stimulant.
It doesn't contain as much as coffee, but enough to produce a response without causing the "jittery" effects associated with too much caffeine.
What
caffeine does in the brain is to block an inhibitory neurotransmitter
called Adenosine. This way, it actually increases the firing of neurons
and the concentration of neurotransmitters like dopamine and
norepinephrine (4, 5).
Caffeine has been intensively studied before and consistently leads
to improvements in various aspects of brain function, including improved
mood, vigilance, reaction time and memory (6).
However,
green tea contains more than just caffeine. It also has the amino acid
L-theanine, which is able to cross the blood-brain barrier (7).
L-theanine increases the activity of the inhibitory neurotransmitter GABA, which has anti-anxiety effects. It also increases dopamine and the production of alpha waves in the brain (7, 8, 9).
Studies
show that caffeine and L-theanine can have synergistic effects. The
combination of the two is particularly potent at improving brain
function (10, 11).
Because
of the L-theanine and the smaller dose of caffeine, green tea can give
you a much milder and different kind of "buzz" than coffee.
Many people report having more stable energy and being much more productive when they drink green tea, compared to coffee.
10 Proven Benefits of Green Tea
Green tea is the healthiest beverage on the planet.
It is loaded with antioxidants and nutrients that have powerful effects on the body.
These include improved brain function, fat loss, a lower risk of cancer and many other impressive benefits.
Below are 10 health benefits of green tea that are supported by studies.
Green tea is more than just liquid.
Many
of the plant compounds in the tea leaves do make it into the final
drink, which contains large amounts of important nutrients (1).
Tea is rich in polyphenols that have effects like reducing inflammation and helping to fight cancer.
Green
tea is about 30 percent polyphenols by weight, including large amounts
of a catechin called EGCG. Catechins are natural antioxidants that help
prevent cell damage and provide other benefits.
These substances
can reduce the formation of free radicals in the body, protecting cells
and molecules from damage. These free radicals are known to play a role
in aging and all sorts of diseases.
EGCG (Epigallocatechin
Gallate) is one of the most powerful compounds in green tea. It has been
studied to treat various diseases and may be one of the main reasons
green tea has such powerful medicinal properties (2).
Green tea also has small amounts of minerals that are important for health.
Try
to choose a higher quality brand of green tea, because some of the
lower quality brands can contain excessive amounts of fluoride (3).
That being said, even if you choose a lower quality brand, the benefits still far outweigh any risk.
Summary
Green tea is loaded with polyphenol antioxidants, including a catechin
called EGCG. These antioxidants can have various beneficial effects on
health.
Green tea does more than just keep you awake, it can also make you smarter.
The key active ingredient is caffeine, which is a known stimulant.
It doesn't contain as much as coffee, but enough to produce a response without causing the "jittery" effects associated with too much caffeine.
What
caffeine does in the brain is to block an inhibitory neurotransmitter
called Adenosine. This way, it actually increases the firing of neurons
and the concentration of neurotransmitters like dopamine and
norepinephrine (4, 5).
Caffeine
has been intensively studied before and consistently leads to
improvements in various aspects of brain function, including improved
mood, vigilance, reaction time and memory (6).
However,
green tea contains more than just caffeine. It also has the amino acid
L-theanine, which is able to cross the blood-brain barrier (7).
L-theanine increases the activity of the inhibitory neurotransmitter GABA, which has anti-anxiety effects. It also increases dopamine and the production of alpha waves in the brain (7, 8, 9).
Studies
show that caffeine and L-theanine can have synergistic effects. The
combination of the two is particularly potent at improving brain
function (10, 11).
Because
of the L-theanine and the smaller dose of caffeine, green tea can give
you a much milder and different kind of "buzz" than coffee.
Many people report having more stable energy and being much more productive when they drink green tea, compared to coffee.
If you look at the ingredients list for any fat burning supplement, chances are that green tea will be on there.
This is because green tea has been shown to increase fat burning and boost the metabolic rate, in human controlled trials (12, 13).
In one study in 10 healthy men, green tea increased energy expenditure by 4% (14).
Another
study showed that fat oxidation was increased by 17%, indicating that
green tea may selectively increase the burning of fat (15).
However, some studies on green tea don't show any increase in metabolism, so the effects may depend on the individual (16).
Caffeine
itself has also been shown to improve physical performance by
mobilizing fatty acids from the fat tissues and making them available
for use as energy (17, 18).
In two separate review studies, caffeine has been shown to increase physical performance by 11-12%, on average (19, 20).
10 Proven Benefits of Green Tea
Green tea is the healthiest beverage on the planet.
It is loaded with antioxidants and nutrients that have powerful effects on the body.
These include improved brain function, fat loss, a lower risk of cancer and many other impressive benefits.
Below are 10 health benefits of green tea that are supported by studies.
Green tea is more than just liquid.
Many
of the plant compounds in the tea leaves do make it into the final
drink, which contains large amounts of important nutrients (1).
Tea is rich in polyphenols that have effects like reducing inflammation and helping to fight cancer.
Green
tea is about 30 percent polyphenols by weight, including large amounts
of a catechin called EGCG. Catechins are natural antioxidants that help
prevent cell damage and provide other benefits.
These substances
can reduce the formation of free radicals in the body, protecting cells
and molecules from damage. These free radicals are known to play a role
in aging and all sorts of diseases.
EGCG (Epigallocatechin
Gallate) is one of the most powerful compounds in green tea. It has been
studied to treat various diseases and may be one of the main reasons
green tea has such powerful medicinal properties (2).
Green tea also has small amounts of minerals that are important for health.
Try
to choose a higher quality brand of green tea, because some of the
lower quality brands can contain excessive amounts of fluoride (3).
That being said, even if you choose a lower quality brand, the benefits still far outweigh any risk.
Green tea does more than just keep you awake, it can also make you smarter.
The key active ingredient is caffeine, which is a known stimulant.
It doesn't contain as much as coffee, but enough to produce a response without causing the "jittery" effects associated with too much caffeine.
What
caffeine does in the brain is to block an inhibitory neurotransmitter
called Adenosine. This way, it actually increases the firing of neurons
and the concentration of neurotransmitters like dopamine and
norepinephrine (4, 5).
Caffeine
has been intensively studied before and consistently leads to
improvements in various aspects of brain function, including improved
mood, vigilance, reaction time and memory (6).
However,
green tea contains more than just caffeine. It also has the amino acid
L-theanine, which is able to cross the blood-brain barrier (7).
L-theanine increases the activity of the inhibitory neurotransmitter GABA, which has anti-anxiety effects. It also increases dopamine and the production of alpha waves in the brain (7, 8, 9).
Studies
show that caffeine and L-theanine can have synergistic effects. The
combination of the two is particularly potent at improving brain
function (10, 11).
Because
of the L-theanine and the smaller dose of caffeine, green tea can give
you a much milder and different kind of "buzz" than coffee.
Many people report having more stable energy and being much more productive when they drink green tea, compared to coffee.
If you look at the ingredients list for any fat burning supplement, chances are that green tea will be on there.
This is because green tea has been shown to increase fat burning and boost the metabolic rate, in human controlled trials (12, 13).
In one study in 10 healthy men, green tea increased energy expenditure by 4% (14).
Another
study showed that fat oxidation was increased by 17%, indicating that
green tea may selectively increase the burning of fat (15).
However, some studies on green tea don't show any increase in metabolism, so the effects may depend on the individual (16).
Caffeine
itself has also been shown to improve physical performance by
mobilizing fatty acids from the fat tissues and making them available
for use as energy (17, 18).
In two separate review studies, caffeine has been shown to increase physical performance by 11-12%, on average (19, 20)..
Cancer is caused by uncontrolled growth of cells. It is one of the world's leading causes of death.
It is known that oxidative damage contributes to the development of cancer and that antioxidants may have a protective effect (21).
Green
tea is an excellent source of powerful antioxidants, so it makes sense
that it could reduce your risk of cancer, which it appears to do:
- Breast cancer: A
meta-analysis of observational studies found that women who drank the
most green tea had a 20-30% lower risk of developing breast cancer, the
most common cancer in women (22).
- Prostate cancer:
One study found that men drinking green tea had a 48% lower risk of
developing prostate cancer, which is the most common cancer in men (23).
- Colorectal cancer: An analysis of 29 studies showed that those drinking green tea were up to 42% less likely to develop colorectal cancer (24).
Many
observational studies have shown that green tea drinkers are less
likely to develop several types of cancer. However, more high-quality
research is needed to confirm these effects (25, 26).
It is important to keep in mind that it may be a bad idea to put milk
in your tea, because some studies suggest it reduces the antioxidant
value (27).
Not only can green tea improve brain function in the short term, it may also protect your brain in old age.
Alzheimer's disease is the most common neurodegenerative disease in humans and a leading cause of dementia.
Parkinson's
disease is the second most common neurodegenerative disease and
involves the death of dopamine producing neurons in the brain.
Multiple
studies show that the catechin compounds in green tea can have various
protective effects on neurons in test tubes and animal models,
potentially lowering the risk of Alzheimer's and Parkinson's (28, 29, 30).
Summary
The bioactive compounds in green tea can have various protective
effects on the brain. They may reduce the risk of both Alzheimer's and
Parkinson's, the two most common neurodegenerative disorders.
The catechins in green tea also have other biological effects.
Some
studies show that they can kill bacteria and inhibit viruses like the
influenza virus, potentially lowering your risk of infections (31, 32, 33, 34).
Streptococcus
mutans is the primary harmful bacteria in the mouth. It causes plaque
formation and is a leading contributor to cavities and tooth decay.
Studies
show that the catechins in green tea can inhibit the growth of
Streptococcus mutans. Green tea consumption is associated with improved
dental health and a lower risk of caries (35, 36, 37, 38).
Multiple studies also show that green tea can reduce bad breath (39, 40).
.
Type
2 diabetes is a disease that has reached epidemic proportions in the
past few decades and now afflicts about 400 million people worldwide.
This
disease involves having elevated blood sugar levels in the context of
insulin resistance or an inability to produce insulin.
Studies show that green tea can improve insulin sensitivity and reduce blood sugar levels (41).
One
study in Japanese individuals found that those who drank the most green
tea had a 42% lower risk of developing type 2 diabetes (42).
According
to a review of 7 studies with a total of 286,701 individuals, green tea
drinkers had an 18% lower risk of becoming diabetic (43)..
Cardiovascular diseases, including heart disease and stroke, are the biggest causes of death in the world (44).
Studies show that green tea can improve some of the main risk factors for these diseases.
This includes total cholesterol, LDL cholesterol and triglycerides (45).
Green
tea also dramatically increases the antioxidant capacity of the blood,
which protects the LDL particles from oxidation, which is one part of
the pathway towards heart disease (46, 47).
Given
the beneficial effects on risk factors, it is not surprising to see
that green tea drinkers have up to a 31% lower risk of cardiovascular
disease (48, 49, 50)..
Given that green tea can boost the metabolic rate in the short term, it makes sense that it could help you lose weight.
Several studies show that green tea leads to decreases in body fat, especially in the abdominal area (51, 52).
One
of these studies was a 12-week randomized controlled trial in 240 men
and women. In this study, the green tea group had significant decreases
in body fat percentage, body weight, waist circumference and belly fat (53).
However,
some studies don't show a statistically significant increases in weight
loss with green tea, so this needs to be taken with a grain of salt (54)..
Of course, we all have to die eventually. That is inevitable.
However, given that green tea drinkers are at a lower risk of cardiovascular disease and cancer, it makes sense that it could help you live longer.
In a study of 40,530 Japanese adults, those who drank the most green tea (5 or more cups per day) were significantly less likely to die during an 11 year period (55):
- Death of all causes: 23% lower in women, 12% lower in men.
- Death from heart disease: 31% lower in women, 22% lower in men.
- Death from stroke: 42% lower in women, 35% lower in men.
Another
study in 14,001 elderly Japanese individuals aged found that those who
drank the most green tea were 76% less likely to die during the 6 year
study period (56).
In
order to feel better, lose weight and lower your risk of chronic
diseases, then you might want to consider making green tea a regular
part of your life.
An evidence-based nutrition article from our experts at Authority Nutrition.