In 1211, Yosai, higher monk wrote a book about Japanese green tea. The book is called Kissa Yojoki and in this book, he explained Japanese green tea as a medicine for anti ageing and longer living life. It is clear that in China and Japan, Green tea was recognised as a medicine as well as the enjoyment. But actually, it was just around 30years ago, scientists started to prove the health effect on Japanese green tea. These are the main chemical compositions of Japanese green tea, the health effects of the each chemical compositions and content by percentage for one cup of tea.
Catechin ( 11-17% ), anti-oxidative activity, anti obesity effect, hypoglycemic activity, inhibition of bad cholesterol, cavity protection
Cafeine (1.6-3.5%), fatigue recovery, awakening effect, diuretic effect
Thenanine ( 0.6-2%), relaxing effect
Vitamine C (0.3-0.5%), anti-oxidative activity, strengthen the immune system, fatigue recovery
Minerals (1-1.5%) fluorine, iron, potassium, calcium ,magnesium. essential for your metabolism, cavity protection
Saponin (0.2%) insulin action, anti fatigue action, energy enhancing, thromboprophylaxis