hey friends welcome back to our Channel have you heard people complaining that they cannot have
coffee because when they have coffee uh their heartbeat raises they could even be sweaty and
just overall very uncomfy but they don't have the same phenomena when they have tea even though tea
also have caffeine I think today's topic might provide a possible explanation for this phenomena
if you're new here hello my name is Zhen Phil and I run a tea shop specialized in
fine tasting great Chinese tea in this channel we share videos about various
teas how it's made or how to make tea at home and much much more so if you are also
a tea Lover Please consider subscribing without further Ado let's get started
thank you [Music]
L-theanine was the first abstracted by a Japanese scholar in 1950 from gyokuro a Japanese green tea
it was considered a unique non-protein amino acid that only found in tea but now we know
there are a few other plants mushrooms that has l-theanine in them l-theanine is highly water
soluble so when we Brew tea we can easily access the l-theanine in those tea leaves
it has a gentle sweet and Umami taste so it helps improve the flavor as well as the
aroma of tea many people get to know l-theanine because of its amazing health benefit it boosts
immune system it suppressed cancer cellular activities it protects the nerve system help
with lower blood pressure and improve the quality of our sleep it's also a very very
powerful antioxidant what's fascinating is its relationship with the caffeine it's
actually a love and hate relationship we know that caffeine raises our heartbeat keep us awake while
l-theanine has the very opposite effect it calms soothes and helps us sleep and caffeine
also raise our cortisol level while l-theanine help lower it down which when they work together
they basically keep cortisol level stable which is very important for our health l-theanine not
only has countereffect on caffeine it also works with caffeine study shows that with a proper ratio
with caffeine and l-theanine it actually help improve our sense of focus make us alert but
not agitated back to Tea L theathine is made by the root system and is transported to the
leaves so within the one tea plant the younger new leaves will have higher l-theanine levels
compared to the lower more mature leaves there are other factors that affect the level of l-theanine
for example the cultivars small Leaf cultivars will have more l-theanine than big leaf cultivars
and even within the small leaf cultivars so there are many many different types of plants uh certain
ones are known for their phenomenally high l-theanine levels for example anji bai cha the
highest l-theanine level in Tea cultivar long jing 43 it's a long jing cultivar also has a
very high l-theanine overall those pale leaf tea plants have higher l-theanine compared to regular
tea plants for example bai ji guan it's a rock tea cultivar that one also has higher l-theanine
another major factor to consider is Tea Type the process affects how much l-theanine left
in the tea leaves for us for example whitea tea is considered to have the highest level
of l-theanine followed by green tea and yellow tea while dark tea has the least because of a it's a
post fermentation process tea Seasons also plays A Part spring tea will have more than summer tea
or autumn tea especially summer tea would have a significantly lower level the higher altitude Tea
will have more l-theanine than the lower altitude overall the better the environment the more
l-theanine it will be in the tea leaves well the purpose of this video is not to encourage
you to drink the most healthy tea life is long and there are so many days for us to try different
food and different teas it's not necessarily only about the most healthy tea and on the other
hand is there a tea that is the most healthy it's actually very hard to say l-theanine for example
is actually a key factor for the tea plants photosynthesis and it's a source for the plant
to make catechin so you know egcg also very very popular uh super superfood healthy All That Jazz
so when you have a higher l-theanine level it means you have less of a catechin or you have
a higher catechin level means l-theanine is pretty much breakdown so there is a balance and just you
know just like we always say Enjoy tea Sometimes some people mention that they would also have that
the the over caffeinated reaction to tea is there any way to minimize it uh while still
enjoy the benefit of tea so a few things first is uh make sure you have food if if you are more
sensitive to caffeine and stuff make sure you have you know some food in your stomach empty
stomach and drink a strong or a big quantity of tea is prone to having this kind of phenomena
low blood pressure work over caffeinated another thing that often overlooked is
choose a higher quality so if you watch our video about the caffeine level in tea as well
and combined with this video you probably already figure out that the higher quality the tea is the
more l-theanine in tea and the less caffeine and the lower the quality of the tea the more
caffeine the less l-theanine so to mitigate that over-caffeinated effect you could try to have a
little bit of Step Up in the tea you choose and see if that helps thank you for joining me today
if you find this video helpful please give me a thumbs up it will really help us grow and don't
forget to subscribe and hit the notification Bell until next time keep steeping [Music]