How to Drink Japanese Green Tea To improve Arteriosclerosis

According to the Singapore Heart Foundation, Atherosclerosis is a "progressive disease in which arteries harden and narrow and their walls to lose elasticity due to the accumulation of fatty deposits."

It's a disease where the blood vessels narrow and blood flow is blocked. It can lead to coronary heart disease, Heart attack, or stroke.

In Singapore, 21 people die from cardiovascular disease every day. It accounts for 32% of all deaths in 2021. It also shows a higher percentage in men (34%) than in women. (29%) [1]

It's a key disease to be aware of and prevent by improving your everyday habits.

Japanese green tea can be a significant part of lifestyle change to reduce the risk.

This article was last modified Dec 11th, 2022. by Yuki

Effectiveness of Japanese Green tea for Stroke Risk

Several human-based studies indicate the effectiveness of green tea in preventing diseases caused by Arteriosclerosis. Let me introduce some of the studies done in this area.

One large-scale research was done on 6,358 Japanese adults aged 40-89 across five years.

It summarized that a "Considerably lower risk was observed for total stroke incidence in both the middle and the high categories of green tea consumption." [3]

People who drink green tea "more than several cups every 2-3 days" (each cup is 70 - 90 ml per cup) had a 59% reduced risk of stroke.
Furthermore, people who drink green tea "five cups every day or more" had a 65% reduced risk of stroke.

Another large-scale research on 40,530 Japanese adults aged 40 - 79 years across 11 years also showed significant effects of green tea consumption in reducing the risk of cardiovascular diseases.

The risk of death due to Cardiovascular diseases decreased by 26%, and death due to stroke decreased by 51% for those drinking more than 5 cups of green tea per day. (each up is measured 100 ml in this research)

It had concluded that Green tea consumption is associated with reduced mortality due to cardiovascular disease.

How does Green Tea Help Reduce the Risk of Cardiovascular Diseases?

Green Tea Catechins, which are polyphenols found in green tea, are known to have several mechanisms that reduce the risks of Cardiovascular Diseases.

Below is a rapid summary of some of those mechanisms.

  • Green Tea Catechin reduces the formation of fat by inhibiting enzymes.
  • They also reduce the absorption of fat in the digestive tract.
  • They also reduce blood pressure by promoting the creation of substances that help loosen the blood vessels. (Such as Nitric Oxide and Prostacyclin)
  • They reduce the inflammation of blood vessels. This inflammation has a crucial role in the development of atherosclerosis.
  • They suppress the creation of atheroma, the fatty build-up inside the arteries.
  • They reduce blood clots by reducing the clumping of blood platelets.

These effects of Catechin on the human body are thought to be the reasons why it reduces the risk of Arteriosclerosis and other cardiovascular diseases.

Now that we know that green tea catechins can help the risk of these diseases let's jump into how you can incorporate this into your daily life.

Choosing the Tea to Maximize Green Tea Catechin Intake

Green Tea Catechins are highest in certain types of Japanese Green Tea, such as Sencha and Tamaryokucha. The increased amount of these nutrients is because Sencha and Tamaryokucha are the most natural types of Japanese green tea.

Why is this?

The tea plant produces green tea catechins in the leaves of the plant. Scientists believe this is a form of the leaf's protection from sunlight. The tea leaves develop catechins more and more as the leaves get exposed to sunlight.

This mechanism is why high-end Japanese green tea such as Gyokuro and Matcha does not contain the most Catechins.

Gyokuro and Matcha are tea artificially shaded from the sun to reduce the amounts of catechins. This improves the taste of the tea, as it reduces the astringency and increases the Umami in the tea leaves.

We do carry a Tamaryokucha product with a measured amount of EGCG and total green tea Catechins, which will be a good option if you're looking for a tea with high EGCG. You can find it here at Misty Crane's EGCG Green Tea.

How to Prepare the Tea to Maximize Green Tea Catechin Intake

How to prepare the tea is also essential to maximize the amount of green tea catechin intake.

There are four different types of green tea catechins in Japanese green tea, and not all efficiently dissolve in cold water.

The EGCG, a type of green tea catechin that accounts for roughly half of the catechins in the tea, can only be extracted from the loose leaves at water temperatures of 80 degrees Celsius or higher.

To maximize the intake of green tea catechins, make sure you use hot water of 80 degrees or higher when you are drinking loose-leaf green tea.

Author Yuki


Yuki is the Editor-in-Chief AND Community Manager at Tealife. He bleeds Japanese Tea and loves being a part of the Japanese Tea journey of others. Writes, does events, conducts tasting sessions, drinks, drinks and drinks tea! Easily accessible - hit him up on whatsapp (+65) 85882980.


[1] Singapore Heart Foundation

[2] Singapore Heart Foundation,to%20heart%20diseases%20or%20stroke.

[3] Naohito Tanabe, Hiroshi Suzuki, Yoshifusa Aizawa, Nao Seki, Consumption of green and roasted teas and the risk of stroke incidence: results from the Tokamachi–Nakasato cohort study in Japan, International Journal of Epidemiology, Volume 37, Issue 5, October 2008, Pages 1030–1040,

[4] Kuriyama S, Shimazu T, Ohmori K, Kikuchi N, Nakaya N, Nishino Y, Tsubono Y, Tsuji I. Green tea consumption and mortality due to cardiovascular disease, cancer, and all causes in Japan: the Ohsaki study. JAMA. 2006 Sep 13;296(10):1255-65. doi: 10.1001/jama.296.10.1255. PMID: 16968850.