Professor T. Shimamura of Showa University Medical School gave a lecture on "Sterilization Effect of Green Tea against E. coli O-157" at the Seminar on "Sterilization Effect
of Green Tea" held on August 22, 1996 in Kakegawa City, Shizuoka,Japan.
Catechins, bitter component of green tea, effectively kills almost every bacteria which causes food poisoning. Moreover, it kills the toxins produced by those bacteria. One of the characteristics of the E. coli O-157 is to produce a potent toxin called veratoxin. The study on Catechins' antidotal effect against veratoxin is already in progress and expectation for the result is optimistic. The mechanism how it kills the bacteria is that Catechins destroys the outer cell of the bacteria when people drink the green tea during or after meals.
For this test, green tea was soaked in the saline water to make 2.5% and 5% dilution of normal tea.
As brewed normally with hot water, more Catechins is extracted, and the antibotal effect is expected to be improved.
[Article from Shizuoka Newspaper of August 23,1996]
[Article from Sankei Newspaper of December 3, 1996]
| Catechins (Bitter Ingredients of Green Tea) |
Reduces risk of cancer
Restrains tumors Reduces risk of mutations Lowers blood cholesterol Prevents high blood pressure Prevents high blood sugar Kills bacteria Fights with flue virus Prevents cavities Prevents bad breath |
| Caffeine | Keeps you awake (Relieves fatigue or sleepiness) Works as diuretic |
| Vitamin C | Reduces stress
Prevents cold and flu |
| Vitamin B Complex | Promotes metabolism |
| Gamma-Amino Butyric
Acid (GABA) |
Lowers high blood pressure |
| Flavonoids | Strengthens the blood vessel wall
Prevents bad breath |
| Polysaccharides | Prevent high blood sugar |
| Fluoride | Prevents cavities |
| Vitamin E | Works as antioxidant
Helps to maintain youthfulness |
| Theanine
(A Kind of Amino Acid) |
Emphasizes flavor |