Green Tea's Efficacy
Green Tea's Efficacy

Surprising Effects of Green Tea

Green Tea's Efficacy

A beautiful Japanese girl enjoying a cold Kyoto Uji Matcha tea.
In the Kamakura era, Esai Zenshi wrote “Kissa Ryojo-ki” (Diary of Tea Drinking as Healthcare). In that he wrote that “Tea is an elixir of healthcare for all ages, a magic for prolonging life.” As we can see here, tea was originally used as medicine. The tea in this time was maccha, in which people drank the tea leaves directly rather than boiling them. This meant they were able to absorb the nutrients directly and feel the fullness of their effects.
Today, many people enjoy drinking tea, but tea specialists and monks who drink maccha regularly tend live to a very old age. The ingredients and the effects of green tea have not been analyzed scientifically, and many people drink it to maintain their health.
The specific effects that can be expected include antioxidation effects, anti-arteriosclerotic effects, prevention of platelet aggregation, protection of the vascular endothelium function, controlling the levels of blood cholesterol and neutral fat, prevention of hyperlipemia, prevention of hyperglycemia, prevention of diabetes, regulation of autonomic nerve, prevention of the rise of blood pressure, relaxation, antivirus effects, strengthening of the immune system, antibacterial effects, diuresis effects, beauty skin effects, anti-aging effects, and deodorization effects. It is known to be especially effective in combatting lifestyle diseases. Its anti-oxidation effects is said to be many times more than that of vitamins C or E.
The human body absorbs oxygen to create energy, but in that process the oxygen can go through chemical change and turn into active oxygen. Active oxygen is effective in elimination bacteria that enters the body, but too much active oxygen can cause oxidation of the human body, causing arteriosclerosis which leads to lifestyle diseases and aging. There are so many things around us that can cause on increase in active oxygen such as smoking, alcohol, unbalanced diet, environmental pollution, UV radiation, and stress. Green tea includes catechin, β carotene, vitamin C, vitamin E, and many minerals which are all rich in anti-oxidation effects. It is known to produce far greater anti-oxidation effects than any other food or drink.
In addition, the catechin in green tea restrains the converting enzyme of angiotensin I, which causes the rise in blood pressure. This reportedly reduces high blood pressure and the risk of apoplectic stroke. Furthermore, green tea also reportedly reduces the oxidation of LDL cholesterol. When the concentration of LDL cholesterol becomes high inside the blood, it sticks to the veins, and when it oxidizes the veins can get clogged, causing cardiac infarction, angina pectoris, and cerebral infarction. However, green tea contains epigallocatechin gallate (EGCg) which is a catechin ingredient, which reduces the oxidation of the LDL cholesterol, also known as the “bad” cholesterol. This can improve one’s health drastically.
There are other effects of catechin. Catechin reduces the breakdown of starch which stops the formation of glucose. This can prevent obesity as it reduces the body fat that is created from glucose.
According to research done by Japan’s Ministry of Heath, Labor and Welfare, women who drink 5 or more cups of green tea daily have a lower risk of having gastric cancer than whose who drink 1 or fewer cups daily. There is also data that men who drink green tea frequently have a lower risk of incurring progressive prostate cancer. In the United States, it is reported that a research team from Purdue University discovered a cancer inhibiting substance in green tea.
Thus there are many surprising effects you can expect from green tea. Why not make it a habit to take a moment to relax and drink greet tea?
*There effects of green tea are a summary of past research, data, and reports and do not serve as medical proof of those effects.