THIS is Your Brain on GREEN TEA: New (2024) Science on the Brain Health Benefits of Green Tea *WOW*

Summary

This video explores the brain-boosting effects of green tea, highlighting the impact of its key compounds like caffeine, L-theanine, and catechins on mood, cognition, and long-term brain health. It delves into acute and chronic effects, emphasizing the reduction in neurodegenerative disease risks and the modulation of gene expression. Also discussed is the intriguing tea-brain-gut axis, where green tea enhances beneficial bacteria for improved brain function.

Takeaways

• 🍵 Green tea consumption is associated with a reduced risk of developing neurodegenerative diseases such as Alzheimer's, Parkinson's, and dementia according to recent research.
• 📚 The presenter began researching the effects of green tea on the brain in 2019 and has since published an academic review article that has been cited over 100 times.
• ⏱️ Green tea has both acute effects, occurring 30 to 120 minutes after consumption, and chronic effects that manifest over years of regular intake.
• ☕ Caffeine, a key component in green tea, improves mood and cognitive performance in the short term and reduces the risk of neurodegenerative diseases in the long term.
• 🌱 L-Theanine, an amino acid in green tea, has been shown to relieve stress and anxiety, improve sleep quality, and decrease the risk of neurodegenerative diseases.
• 🧬 The effects of caffeine and L-Theanine depend on individual genetics, specifically the variants of the CYP1A2 gene which affect caffeine metabolism.
• 🌿 Green tea catechins, particularly EGCG, act as antioxidants and anti-inflammatory agents, influencing gene expression to promote brain health and reduce disease risk.
• 🌱 The catechins in green tea also promote neurogenesis, the growth of new neurons, which contributes to a healthier brain structure.
• 🌐 The 'tea brain gut axis' is a new area of research showing that green tea can increase levels of beneficial bacteria in the gut, which in turn can affect brain health.
• 🔬 The presenter has compiled all the information from the video, including citations and figures, into a downloadable PDF for further reference.
• 🎓 An eight-chapter Masterclass on Tea is available on YouTube, covering a comprehensive guide to tea types, quality assessment, infusion techniques, and history.

Q & A

What are the key findings of the research on green tea consumption and its impact on the human brain?

The research suggests that green tea consumption can lead to a more focused mind, reduced anxiety, and a decreased likelihood of developing neurodegenerative diseases such as Alzheimer's, Parkinson's, and dementia.

What are the two main time windows that the research focuses on regarding green tea's effects on the brain?

The research focuses on the acute effects, which occur 30 to 120 minutes after drinking green tea, affecting mood, attention, and cognitive performance; and the chronic effects, which relate to the long-term impact of regular green tea intake on brain health.

Which compounds in green tea are discussed in the script as having neuroactive and bioactive effects on the human brain?

The script discusses caffeine, L-theanine, and green tea catechins, particularly EGCG, as the key compounds in green tea that mediate its effects on the human brain.

How does caffeine impact mood and cognitive performance in the short term?

Caffeine acutely improves mood and cognitive performance by increasing attention, and it is commonly used as a performance-enhancing drug due to these well-known effects.

What are the long-term effects of caffeine intake on the risk of neurodegenerative diseases?

Chronic intake of caffeine has been associated with significant reductions in the risk for Alzheimer's and Parkinson's diseases, as it can function as an antioxidant and anti-inflammatory agent in the brain.

How does L-theanine contribute to stress and anxiety relief?

L-theanine has been found to have stress and anxiety-relieving effects, with studies showing that it can significantly reduce stress markers in individuals undergoing stressful periods, such as students preparing for exams and new jobs.

What role does L-theanine play in improving sleep quality and cognitive function in the long term?

Chronic intake of L-theanine acts as an antioxidant and anti-inflammatory agent in the brain, contributing to improved sleep quality, decreased risk of neurodegenerative diseases, and increased neurogenesis, leading to enhanced cognitive function in middle-aged and older individuals.

What are the functions of green tea catechins, particularly EGCG, in the brain?

Green tea catechins, especially EGCG, act as free radical scavengers, neutralizing harmful molecules in the brain, and significantly affect gene expression, promoting antioxidant activity, reducing inflammation, and inducing neurogenesis through the CREB/BDNF pathway.

How do green tea catechins influence the brain's gene expression related to antioxidant and inflammatory responses?

Green tea catechins increase the expression of genes like Nrf2, which enhances the brain's antioxidant capacity, and downregulate inflammatory genes, reducing chronic inflammation that can lead to neurodegenerative diseases.

What is the tea brain gut axis and how does it relate to green tea consumption?

The tea brain gut axis refers to the connection between green tea consumption and the levels of brain-altering bacteria in the gut, known as Psychobiotics. Green tea has been shown to increase the levels of beneficial bacteria like lactobacillus and bifidobacteria, which can enhance serotonin production and neurotransmitter levels in both the gut and the brain.

What additional resources are available for those interested in learning more about tea and its effects?

For further learning, a PDF with additional information, including the transcript and key figures, is available for download. Additionally, an eight-chapter Masterclass on Tea is offered on YouTube, covering a range of topics from tea types and quality assessment to global tea history.

Outlines

00:00

🍵 Green Tea and Brain Health Research

The script introduces a body of research on the impact of green tea consumption on the human brain. It highlights the benefits of green tea in reducing anxiety and the risk of neurodegenerative diseases like Alzheimer's, Parkinson's, and dementia. The video aims to explore the acute and chronic effects of green tea on cognitive performance and brain health, focusing on three key compounds: caffeine, L-theanine, and green tea catechins. The speaker's academic background and the significance of the research in the scientific community are also mentioned.

05:00

☕ Caffeine and L-Theanine: Immediate and Long-Term Brain Effects

This paragraph delves into the acute effects of caffeine and L-theanine found in green tea, such as improved mood, attention, and cognitive performance. It also discusses the long-term benefits, including reduced risk of neurodegenerative diseases, attributed to their antioxidant and anti-inflammatory properties. The importance of moderate caffeine intake is emphasized, with individual variation in metabolism affecting the appropriate amount. L-theanine is highlighted for its stress-relieving and sleep-enhancing effects, supported by studies showing its positive impact on reducing stress and anxiety.

10:00

🌿 Green Tea Catechins: Antioxidants and Gene Expression Modulators

The role of green tea catechins, particularly EGCG, in the brain is discussed, focusing on their long-term benefits rather than immediate effects. These catechins act as free radical scavengers, protecting cells from damage, and modulate gene expression related to antioxidant activity, inflammation, and neurogenesis. The paragraph explains how green tea catechins can enhance the body's internal antioxidant capacity, reduce inflammation, and promote the growth and branching of neurons through the activation of genes like CREB and BDNF.

15:00

🧠 The Tea Brain-Gut Axis and Neurotransmitter Regulation

The final paragraph introduces the concept of the tea brain-gut axis, where green tea consumption influences the gut microbiome, leading to increased levels of brain-altering bacteria known as Psychobiotics. These bacteria, such as lactobacillus and bifidobacteria, are linked to increased serotonin production, affecting both gut and brain neurotransmitter levels. The work of Professor Zhang Xin is highlighted for uncovering the connection between tea polyphenols, the microbiome, and the mitigation of psychiatric and neurological disorders.

📚 Additional Resources on Tea and Health

The script concludes with an invitation to access additional resources, including a comprehensive PDF with information from the video, a transcript, and citations. It also promotes an eight-chapter Masterclass on Tea available on YouTube, covering various aspects of tea, such as types, quality assessment, infusion techniques, and history. The speaker encourages viewers to explore these resources for a deeper understanding of tea's health benefits.

Keywords

💡Green Tea

Green tea is a type of tea that is made from the leaves of the Camellia sinensis plant. It is known for its health benefits due to the presence of various bioactive compounds. In the video, green tea is the central subject as it is discussed for its acute and chronic effects on brain health, including mood improvement, cognitive performance, and reduced risk of neurodegenerative diseases such as Alzheimer's, Parkinson's, and dementia.

💡Acute Effects

Acute effects refer to the immediate or short-term physiological changes that occur after a stimulus. In the context of the video, acute effects of green tea consumption are described within a 30 to 120-minute window after drinking a cup. These effects include changes in mood, attention, and cognitive performance, primarily due to the presence of caffeine, l-theanine, and other compounds in green tea.

💡Chronic Effects

Chronic effects are the long-term outcomes or consequences that result from repeated exposure or consumption over time. The video discusses the chronic effects of green tea on the brain, indicating that regular, daily intake can lead to a lower likelihood of developing neurodegenerative diseases. These effects are attributed to the antioxidant and anti-inflammatory properties of green tea compounds.

💡Caffeine

Caffeine is a natural stimulant that is often associated with increased alertness and improved cognitive performance. In the video, it is mentioned as a key compound in green tea that contributes to acute improvements in mood and cognitive performance. Moreover, chronic intake of caffeine is linked to reduced risks of Alzheimer's and Parkinson's diseases, acting as an antioxidant and anti-inflammatory agent in the brain.

💡L-Theanine

L-Theanine is an amino acid found predominantly in green tea that is known for its calming effects and ability to reduce stress and anxiety. The video highlights L-theanine's role in improving sleep quality, alleviating depression, enhancing learning and memory, and decreasing the risk of neurodegenerative diseases. It is also discussed in the context of its effects on reducing stress in students preparing for exams and starting new jobs.

💡Neurodegenerative Diseases

Neurodegenerative diseases are conditions that involve the progressive loss of structure or function of neurons, leading to cognitive decline and other neurological impairments. The video script mentions diseases such as Alzheimer's, Parkinson's, and dementia as examples of neurodegenerative conditions that are less likely to develop in individuals with regular green tea consumption.

💡Catechins

Catechins are a class of antioxidant compounds found in green tea, with EGCG being the most famous and abundant. The video explains that catechins, while not having immediate acute effects on mood and alertness, play a significant role in the chronic health benefits of green tea. They act as free radical scavengers and influence gene expression related to antioxidant activity, inflammation, and neurogenesis.

💡Antioxidant

Antioxidants are substances that can prevent or slow damage to cells from reactive oxygen species, such as free radicals. In the video, green tea catechins are described as antioxidants that neutralize free radicals in the brain, protecting cells from damage and potentially reducing the risk of neurodegenerative diseases.

💡Inflammation

Inflammation is the body's natural response to harmful stimuli but can become problematic when it is chronic. The video discusses how green tea catechins can downregulate the expression of inflammation genes, reducing chronic inflammation that may contribute to neurodegenerative diseases.

💡Neurogenesis

Neurogenesis refers to the process by which new neurons are generated in the brain. The video script explains that L-theanine and green tea catechins can increase neurogenesis, leading to the growth and branching of neurons, which is crucial for learning, memory, and overall brain health.

💡Tea Brain Gut Axis

The tea brain gut axis is a concept discussed in the video that refers to the interaction between green tea consumption, the gut microbiome, and the brain. It is suggested that green tea can increase levels of brain-altering bacteria, known as psychobiotics, which can enhance serotonin production and neurotransmitter levels in both the gut and the brain, potentially alleviating psychiatric and neurological disorders.

Highlights

Green tea consumption is associated with reduced anxiety and a decreased likelihood of developing neurodegenerative diseases such as Alzheimer's, Parkinson's, and dementia.

The video explores the impact of green tea on the human brain, based on extensive research and an academic review article published in 2019.

Green tea has both acute effects, such as mood and cognitive performance changes within 30 to 120 minutes post-consumption, and chronic effects observed over years of regular intake.

Caffeine in green tea improves mood, cognitive performance, and attention in the short term, and may reduce the risk of neurodegenerative diseases with chronic intake.

Caffeine functions as an antioxidant and anti-inflammatory agent in the brain, but its benefits must be balanced with potential sleep disruption.

Individual caffeine metabolism varies due to the CYP1A2 gene, affecting how much caffeine can be consumed without affecting sleep.

L-Theanine, an amino acid in green tea, has short-term and long-term brain benefits, including stress and anxiety relief, improved sleep quality, and decreased risk of neurodegenerative diseases.

Studies show L-Theanine significantly reduces stress in humans, as demonstrated in a study with students preparing for exams and new jobs.

Green tea catechins, particularly EGCG, have minimal acute effects but play a significant role in long-term brain health through antioxidant and anti-inflammatory activities.

Green tea catechins act as free radical scavengers, protecting cells from damage and potentially reducing the risk of diseases like cancer.

Green tea catechins influence gene expression related to antioxidant activity, inflammation response, and neurogenesis, contributing to overall brain health.

The tea brain gut axis is a recent area of research showing that green tea consumption can increase levels of brain-altering bacteria, impacting mood and cognition.

Green tea enhances psychobiotic bacteria like lactobacillus and bifidobacteria, which can increase serotonin production and neurotransmitter levels.

Research by Zhang Xin from Ningbo University highlights the connection between tea polyphenols, the microbiome, and the alleviation of psychiatric and neurological disorders.

A comprehensive PDF with additional information, including the transcript and key figures, is available for download to further explore the topics discussed in the video.

An eight-chapter Masterclass on Tea is available on YouTube, covering a wide range of tea-related topics from types and quality assessment to global history.

Transcripts

is more focused,

less anxious,

and way less likely

to develop diseases

like Alzheimer's,

Parkinson's

and dementia.

Those are the findings

of a mountain

of fascinating

new research

that has explored

how green

tea consumption

impacts

the human brain.

in this video,

we are diving

into this research

and breaking it

right down.

I began

researching this topic

formally in 2019

when I published

an academic review

article about tea

brain interactions,

And this article

has been cited

over 100 times

by researchers

around the world.

with this endorsement

from the

scientific community

I thought it was

about time

to bring this

fascinating information

to the rest of us.

And what better place

to do such a thing than

the YouTube.

We're

honing in on two key

windows of time

in terms of the effects

of green tea

consumption

on the brain.

we have the acute

effects, which is like

30 to about

120 minute window

of time

right after you sip

a cup of green tea.

These are

changes in mood,

attention and

cognitive performance.

These are coming from

caffeine, l-theanine

and some of the

other compounds

in green tea

that we're going

to get into

in a second.

The second

window of time

is called

the chronic effects.

And this is how

the brain

of a green tea drinker

looks different

through years of daily

regular green

tea intake

and how such a brain

is much less likely

to develop diseases

like dementia,

Alzheimer's

and Parkinson's.

for now,

let's get into

how green tea

is impacting the brain.

we have

our two windows of time

and we have three major

green tea molecules,

three neuroactive

and bioactive compounds

in green tea

that will be mediating

these effects

on the human brain.

our first key

critical compound

is caffeine.

Caffeine is the, quote

unquote, most consumed

mind altering

drug on earth.

Well, acutely,

caffeine is improving

mood and

cognitive performance.

It increases attention.

People use it

as a performance

enhancing drug

these are very well

known facts

about caffeine intake

in the short run.

But what is

a little bit

less known

about caffeine

is that in the long run

through chronic

intake of caffeine,

you see

significant reductions

in risk for Alzheimer's

and Parkinson's.

Caffeine can

actually function

as an antioxidant and

anti-inflammatory agent

in the brain.

moderate.

That's the key

word here. Right.

Too much

caffeine is bad

and it affects

your sleep latency,

actually your ability

to fall asleep.

And no

benefit of caffeine

in the long run

can compensate

for a loss of sleep

or sleep quality.

So you need

to take caffeine

in moderation.

and what is

an appropriate

amount of caffeine

intake daily

for humans depends.

humans

have a

gene called CYP1A2

and different variants

of this gene control

your relative ability

to degrade

and break down caffeine

after you've

consumed it.

So if you have

a double copy of the

slow metaboliser,

then you're going to be

the person who sips

a espresso

at eight in the morning

and they still are

feeling jittery

at 9 p.m..

Then you have the fast

metabolisers

who can

drink a cup

of green tea

and fall asleep

20 minutes later.

And then the rest of us

are somewhere

in between.

So it depends on

your genetics

it would be nice

if you got your

genome tested,

but you can generally

just feel for yourself

how much

caffeine affects you

whatever you can drink

and not have your

sleep affected,

that's the right amount

for you.

Caffeine gets a bad

rap, but in reality,

if you take it

in moderation

and you

consume it responsibly,

it can be pretty good,

So the second

green tea, neuro active

that is mediating

these really cool

effects on the brain

is called L Theanine

and it's

this amino acid

that has

really incredible

short term and long

term effects

on the brain.

So a really cool

review article I found

written in 2021

compiled

all of the effects

that Theanine

has been found

to have on the brain.

Some of them were

human studies

and some of them

were animal studies.

But You can see

You have stress

and anxiety

relieving effects.

We have improved

sleep quality.

we have

alleviation

of depression,

have enhanced learning

and memory

and decreasing risk

of neurodegenerative

diseases.

study design

different doses

of l-theanine effects

And all these

references

I have linked

in the work

cited of this video.

personally, to me

the most interesting of

these effects

is the anti-stress

and anti-anxiety

effects.

Gilmore.

You suck.

I’d love

to punch

that guy in the face

right now

But I can't in all

because I’d

get in trouble.

But secondly,

this is the topic

that has

the most amount

of research done

about it.

When you're looking

at the effects of

green tea

and specifically

l-theanine

on the brain.

one of my

favorite studies

was conducted by Dr.

Unno from Japan,

and she took

undergraduate students

who were preparing

for a final exam

and then

starting their new job.

And so it's a

very stressful time

in the lives

of these students.

She had two groups.

One was placebo

and one was

200 milligrams

of l-theanine

twice a day.

she found

during this time

the both subjective

and objective markers

of stress in these

students

was significantly lower

in the L-theanine group

than the placebo group.

the subjective stress

marker is just asking

how stressed out

are you right now?

And you can rate it

1 to 10.

And then

the objective marker

was measuring

the salivary

amylase levels

Basically,

when we're more

stressed out,

we have more

salivary amylase

that study

was fascinating done

in humans subjective

and objective measures

showing that l-theanine

significantly

reduced stress

in this very stressful

time of the

student's lives.

so there's all types

of studies actually

just like that

that have used

human subjects

and found

that L-theanine

had a

significant stress

reducing an

anti-anxiety effect.

it's been

so clearly observed

at this point

that researchers are

hardly

even asking,

does l-theanine reduce

stress and anxiety?

They're more asking

how does l-theanine

reduce stress, anxiety?

the mechanisms

here are actually

still an active

area of research,

but you can

check out this article

if you want to

dive into how

this is even

humanly possible.

for now,

let's switch

to the chronic side

of things chronically

through daily

regular

intake of green tea,

you see L-theanine

acting again as an

antioxidant

and anti-inflammatory

agent in the brain,

which over time

contributes

to a much lower

risk level

for Alzheimer's,

dementia

and Parkinson's.

And indeed, researchers

have found

a significantly

negative correlation

between l-theanine

intake and risk

for Parkinson's

disease,

And you also see

significantly improved

cognitive function

in middle

and older

aged individuals.

So another

effect of regular daily

l-theanine intake over

time is

increased neurogenesis,

if you have

a human brain

cell in a petri dish

and you squirt

l-theanine on it, then

it grows

thicker and bigger

it grows

more neurites, right?

These are the branches

of the neuron cell

that connect

and form connections

with other neurons

in the brain.

So exposed

to l-theanine human

brain cells

grow

which is

pretty incredible.

the mechanism

is still being

worked out,

but one article

I found by Yoneda

showed one potential

pathway of L-theanine

induced neurogenesis,

which you can

check out here,

and his more

recent article is here.

These are both

working models for

how L-theanine

works

through a number

of receptors

and signaling molecules

to activate

neurogenesis in

human neurons.

a final thing

on L-theanine is

if you've seen chapter

two of the MasterClass

on Tea,

you'll remember that

L-theanine varies a lot

with growing conditions

of the tea plant,

And it's

usually the case that

with green tea

it is

the more

higher grade teas

that have more

l-theanine levels,

if you want to maximize

the effects

of green tea

on the brain

and specifically

the l-theanine

mediated effects

on the brain,

then you want to go

for the top shelf sh*t,

That's good sh*t.

Now on to our third

and probably actually

most important,

neuroactive compound

in green tea.

That's right, folks.

I saved the best

for last.

We are talking

about green

tea Catechins.

green tea Catechins

is actually

a little family

of eight catechins

in the most famous

and most abundant

in green tea

is called EGCG.

So what is the function

of these green tea

catechins in the brain?

Well,

in the acute

time window,

you don't see much

effect of catechins

when it comes to

the changes

in mood and alertness

and cognitive

performance

in the short run.

Green tea

catechins are

not really

the stars of the show.

That is more caffeine

and l-theanine.

However,

when we take things

long term

and we go chronic

they are doing

the lion's

share of the work,

there's two

hugely important

ways that

these green tea

catechins are affecting

the brain

in the long term.

And so the first way

is that these green tea

catechins are directly

acting as free

radical scavengers.

what is a free radical

in the brain?

these are basically

tiny little,

a**hole molecules

that bounce around

the cells of your body

and destroy things.

when they touch

the lipids

or proteins

or DNA of your cells,

they rip

electrons off of them

and make them

ineffective,

when it happens

to your DNA,

it can cause mutations

that can lead

to cancer.

When it happens

to proteins

and cell membranes

it can cause

leakage of things

and things

just not working

properly.

green tea

catechins are great

at neutralizing

these free radicals

making it

so that they can't

destroy

the molecules

in your cells.

Nice. Nice,

The second big way.

The green tea catechins

are improving

brain health

and functioning in

the brain is green tea

catechins

are significantly

affecting

gene expression,

the turning on

and turning off of key

important brain health

modulating genes

in your brain cells.

the first one

actually relates

back to the

antioxidant activity

and something

I didn't mention

about these

free radicals

is that aside

from being created

by toxin exposure,

by smoking and drinking

and etc.

fun activities,

they are also created

naturally

when we

use oxygen

to create ATP,

we are also generating

a small baseline level

of free radicals.

So basically

we've evolved systems

inherently in our body

to neutralize

these free radicals.

So we ourselves

have our own

antioxidant machinery

built into our cells

and green tea

turns up the expression

turns up the genes

that create these

antioxidant enzymes.

Right.

One of the most

famous ones

is called Nrf2

And basically

exposure to green

tea catechins increases

the expression of Nrf2

that is enhancing

our own innate

internal capacity

for antioxidant

function.

which I might say

is pretty

radical,

Smack the lip,

Whapow ride the barrell

and get pitted.

you knew

the radical

PUN was coming.

So another key

gene pathway

that's being

turned down

by green tea catechins

is the

inflammatory pathway.

green tea

catechins are down

regulating

the expression

of inflammation genes

so that is keeping us

from getting inflamed

chronically,

which is great.

we mentioned

that inflammation

is kind of that bridge

in between

toxin exposure

and disease

in the long run.

it's the exposure

to these toxins

that creates

chronic inflammation.

And that what,

you know,

a lot of people

think is what causes

the disease

of the brain,

such as Alzheimer's,

Parkinson's, dementia.

So green tea

catechins down

regulates

the inflammation genes

and the

inflammation response.

So the next gene

that green

tea catechins

are changing

the levels of

and changing

the expression of

is called CREB.

CREB is

a really cool gene

that Upregulates

mitochondrial

biogenesis basically

increasing the amount

of energy and ATP

that your brain cells

can produce, CREB

also turns up

the expression of BDNF,

and so CREB

and BDNF are in

one pathway.

It's called the

CREB/BDNF pathway.

And both of those genes

are getting activated

by green tea Catechins

and BDNF is

huge, brain derived

neurotrophic factor,

that induces

neurogenesis.

that is another thing

that's causing

the growth and the out

branching of

your neurons

in your brain.

and CREB has also been

associated

with healthy, normal

expression of dopamine

and neurotransmitter

systems.

CREB is going

to keep you

from bouncing

off the walls

when you get down some.

So basically

this profile

of gene expression

that you get with green

tea catechin exposure,

we're having

more antioxidant

activity,

we're having less

inflammation activity,

we're having more CREB

BDNF induced

neurogenesis,

more growth and out

branching of neurites

And we're

having regulated

neurotransmission

in the brain,

you take those,

you combine it

with direct

free radical

neutralizing effects

of green tea catechins

and you

can get a glimpse,

a picture of why

a brain

that has been consuming

green tea

for years and years

and years

looks so different.

The architecture

of the brain,

the physical structure

of it,

and the biochemistry

of that brain

is significantly less

likely

to develop disease

So, folks,

I wish I could leave

the discussion

here, right?

Because we've covered

the three molecules

and we've covered the

chronic

and the acute effects,

but I simply can't

because there's

one extra topic

within green tea

brain effects

that is so interesting

and maybe could

be possibly

the most important

of everything

we've talked

about so far.

And it is

something called

the tea brain

gut axis,

research coming out

since 2020,

in the last

couple of years

in particular

have shown that green

tea consumption

increases the levels

of brain

altering bacteria

in our gut.

they’re communities

called Psychobiotics.

And green tea enhances

improves the levels

of some of these

key bacteria

like lactobacillus

and bifidobacteria,

that are

actually increasing

serotonin production

and increasing

the neurotransmitter

levels in your gut

and in your brain.

and one professor named

Zhang Xin from Ningbo

University

has been leading

the charge

on uncovering

some of these

really fascinating ways

that tea polyphenols

are working through

the microbiome

to alleviate

psychiatric and

neurological disorders.

His research

is honestly

mind boggling,

or should I say

gut boggling.

And what else

boggles my gut

I took all of the information in this video, including the transcript

of the 104 works cited and 16 of the key figures that you saw

flash across the screen and added captions with new information about them.

I took all that information, put it into a PDF which you can download

for free using the link in the description.

Beyond that, here on YouTube, I have an eight

chapter Masterclass on Tea, which is the ultimate guide

to learning about all things Tea, including major Tea types.

Tea Quality assessment, how to infuse tea properly, global tea history and more.

Chapter 1

I’m putting it right there

So, check out this video

and check out the MasterClass as a whole

and I will see you

in the next video