In Japan people believe that green tea is good for health. A study shows that green tea contains amino acid, vitamin A, C, E, B1, B2, Niacin, Fluorine, polyphenol (antioxidant), flabonoid and other important minerals.For comparison, here are 3 types of green tea popular in the market (per 100gram, data ref. from the Ministry of Science, Basic Nutritional Analysis on Japanese Food):
Macha 29,000 μg of vit A, 60 mg of C, 28.1 mg of E, 0.63 mg of B1 and 1.35 mg of B2
Gyokuro 21,000 μg of vit A, 110 mg of C, 16.6 mg of E, 0.30 mg of B1 and 1.16 mg of B2
Sencha 13,000 μg of vit A, 260 mg of C, 68.1 mg of E, 0.36 mg of B1 and 1.43 mg of B2
As for caffeine level, i used to think that drinking coffee makes me awake, but i never think so for green tea. Well, I was wrong because they contain just as much caffeine : Arabica 2.5%, Robusta varies from 2.5-4%, Macha 3.2%, Gyokuro 3.5%, Sencha 2.3%
Perhaps it is good to consider not only the nutrition but also the effect of not being able to sleep well after drinking strong coffee or green tea. Like other caffeine drinks, it is best to drink them moderately. Having said that, to maintain taste and quality of green tea at its best, a bag of tea opened in summer time is best consumed within half a month, while in winter within a month. So what do we do with the left over tea which is obviously too old to drink?
* In winter, you can use old green tea for "green tea" bath --> yes, for a nice warm bath
* Wrap it nicely then you can use it as deodorizer for the refrigerator, for shoes, etc. as it helps to get rid of smell.
* As it contains fluorine, you can also use it for mouth rinse.
Another study suggests that it is better to drink tea before having a big meal, because tannin in green tea actually slow down the process of digestion. It is also another reason why green tea is believed to have some effect on diet/weight lost.
Other information on green tea in English:
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