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Green tea extract

Green tea
Green tea 3 appearances.jpg
The appearance of green tea in three different stages: (from left to right) the infused leaves, the dry leaves, and the liquid. (Notice that the infused leaves look greener than the dry leaves.)
Type Tea
Country of origin China
Region of origin East Asia
Ingredients Tea leaves
Brewed, regular green tea
Nutritional value per 100 g (3.5 oz)
Energy 4 kJ (0.96 kcal)
0 g
0 g
0.2 g
Vitamins
Thiamine (B1)
(1%)
0.007 mg
Riboflavin (B2)
(5%)
0.06 mg
Niacin (B3)
(0%)
0.03 mg
Vitamin B6
(0%)
0.005 mg
Vitamin C
(0%)
0.3 mg
Minerals
Calcium
(0%)
0 mg
Iron
(0%)
0.02 mg
Magnesium
(0%)
1 mg
Manganese
(9%)
0.18 mg
Potassium
(0%)
8 mg
Sodium
(0%)
1 mg
Other constituents
Water 99.9 g
Caffeine 12 mg

Percentages are roughly approximated using US recommendations for adults.
Chinese name
Xi Hu Longjing Tea 01.jpg
Longjing, a green tea from Zhejiang, China
Traditional Chinese 綠茶
Simplified Chinese 绿茶
Hanyu Pinyin lǜchá
Korean name
Korea-Boseong-Green.tea-09.jpg
tea field in Boseong, South Korea
Hangul 녹차
Hanja 綠茶
Revised Romanization nokcha
McCune–Reischauer nokch'a
IPA [nok̚.tɕʰa]

Green tea is a type of tea that is made from Camellia sinensis leaves that have not undergone the same withering and oxidation process used to make oolong and black tea. Green tea originated in China, but its production has spread to many countries in Asia.

Several varieties of green tea exist, which differ substantially because of the variety of C. sinensis used, growing conditions, horticultural methods, production processing, and time of harvest.

Tea consumption has its legendary origins in China during the reign of Emperor Shennong.

A book written by Lu Yu in 600-900 AD (Tang Dynasty), "Tea Classic" (simplified Chinese: ; traditional Chinese: ; pinyin: chájīng), is considered important in green tea history. The Kissa Yojoki (喫茶養生記 Book of Tea), written by Zen priest Eisai in 1191, describes how drinking green tea may affect five vital organs, the shapes of tea plants, flowers and leaves, and how to grow and process tea leaves.

Steeping, or brewing, is the process of making tea, generally using two grams of tea per 100 ml of water or about 1 teaspoon of green tea per 150 ml cup. Higher-quality teas, like gyokuro, use more tea leaves and are steeped multiple times for short durations.

Steeping temperatures range from 61°C (142°F) to 87°C (189°F) and times from 30 seconds to three minutes.

Generally, lower-quality green teas are steeped hotter and longer while higher-quality teas are steeped cooler and shorter, but usually for multiple times (2-3 typically). Steeping too hot or for too long results in the release of excessive amounts of tannins, leading to a bitter, astringent brew, regardless of initial quality. The brew’s taste is also affected by the steeping technique. Two important techniques are to warm the steeping container beforehand to prevent the tea from immediately cooling down and to leave the tea leaf in the pot and gradually add more hot water as you drink the tea.


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Wikipedia

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