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[10] [11] Tea has one of the highest contents of flavonoids among common food and beverage products. [7] Catechins are the largest type of flavonoids in growing tea leaves. [6] According to a report released by USDA, in a 200-ml cup of tea, the mean total content of flavonoids is 266.68 mg for green tea, and 233.12 mg for black tea. [7]
Epigallocatechin gallate (EGCG), also known as epigallocatechin-3-gallate, is the ester of epigallocatechin and gallic acid, and is a type of catechin.. EGCG – the most abundant catechin in tea – is a polyphenol under basic research for its potential to affect human health and disease.
GABA tea (other names: Gabaron, Jia Wu Long cha, Jing Bai Long cha, 佳叶龙茶) is tea that has undergone a special processing which leads to high accumulation of GABA (the chief inhibitory neurotransmitter in the central nervous system) in the tea leaves.
Epicatechin gallate (ECG) is a flavan-3-ol, a type of flavonoid, present in green tea. [1] It is also reported in buckwheat [2] and in grape. [3]The tea component epicatechin gallate is being researched because in vitro experiments showed it can reverse methicillin resistance in bacteria such as Staphylococcus aureus. [1]
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"Green tea contains antioxidants called catechins that boost the natural cleansing functions of the liver and actually may help reduce viral activity in hepatitis C," says Minchen. "Matcha green ...
Catechins are diverse among foods, [15] from peaches [17] to green tea and vinegar. [15] [18] Catechins are found in barley grain, where they are the main phenolic compound responsible for dough discoloration. [19] The taste associated with monomeric (+)-catechin or (−)-epicatechin is described as slightly astringent, but not bitter. [20]
The lower levels of astringency in hōjicha are due to the tea losing catechins during the high-temperature roasting process. The roasted flavours are extracted and dominate this tea: the roasting replaces the vegetative tones of other varieties of Japanese green tea with a toasty, slightly caramel-like flavour.