All commercial tea produced in Japan today is green tea, though for a brief period black tea was also produced in the late 19th and early 20th centuries. Japanese tea production is heavily mechanized, and is characterized by the use of modern technology and processes to improve yields and reduce labor. Because of the high cost of labor in Japan, only the highest quality teas are plucked and processed by hand in the traditional fashion.
Polyphenols found in green tea include epigallocatechin gallate (EGCG), epicatechin gallate, epicatechins and flavanols, which are under laboratory research for their potential effects in vivo. Other components include three kinds of flavonoids, known as kaempferol, quercetin, and myricetin. Although the mean content of flavonoids and catechins in a cup of green tea is higher than that in the same volume of other food and drink items that are traditionally considered to promote health, flavonoids and catechins have no proven biological effect in humans.
The polyphenols in green tea, especially EGCG, have been shown to have a particularly powerful effect in supporting skin cells and cellular DNA in the presence of UV radiation from sunlight. May different clinical studies have shown EGCG to help skin defend against UVA and UVB rays. And because these polyphenols can accumulate in the skin, regularly drinking green tea or taking a green tea supplement with EGCG can act as all-day supplemental protection.
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It also appears to contain more EGCG. ConsumerLab.com, an independent testing group, tested matcha products in 2015 and found that matcha provided 17 mg to 109 mg of EGCG per serving. By comparison, the average brewed green tea provides 25 to 86 mg per serving. While matcha powders contained more catechins per gram than brewed green tea, it was substantially more expensive: The lowest cost matcha powder was available at the time for $2.31 for 200mg of EGCG, compared to 27 cents for the same amount from brewed green tea. Compared to the powders, matcha in tea bags provides significantly less EGCG.
Researchers from the Netherlands confirmed in a recent study that two green tea compounds, L-theanine and caffeine, can significantly boost levels of attention and alertness, building on what is already known about the brain benefits of green tea. The drink is less likely to make you jittery and anxious than other energy-boosting drinks, because it contains lower levels of caffeine than other teas or coffee. In another study published in the American Journal of Clinical Nutrition, researchers discovered that drinking just one cup of green tea a day made people age 55 and older 38 percent less likely to experience a decline in their mental abilities. Drinking a second cup daily made them 54 percent less likely to show mental declines.
Red rooibos tea is an excellent thirst quencher and does wonders for athletes, hyperactive children, and those who travel often, whether for pleasure or business. Most people prefer to brew red rooibos loose leaf tea in its natural form without using any sweeteners. For those who simply want a refreshing drink, caffeine-free rooibos tea is an ideal choice.
Detox teas are great for flushing out toxins from your body. Toxins like harmful chemicals and free oxygen radicals lead to increased stress levels in the body. Stress slows down metabolism, weakens immunity, and increases the level of inflammation. And you start to gain weight, find it difficult to lose weight, suffer from constipation, gastritis, liver problems, and disturbed sleep, and feel tired all the time. The antioxidants and other phytonutrients in detox teas deactivate the harmful effects of toxins, cleanse the digestive tract, and relax your brain – promoting weight loss and better health. So, let’s get to know the top 10 detox teas that you can buy and start shedding the extra flab. Scroll down.
Tea culture of Korea was actively suppressed by the Japanese during the Japanese forced occupation period (1910‒1945), and the subsequent Korean War (1950‒1953) made it even harder for the Korean tea tradition to survive. The restoration of the Korean way of tea began in the 1970s, around Dasolsa. Commercial production of green tea in South Korea only began in the 1970s,. By 2012 the industry was producing 20% as much tea as Taiwan and 3.5% as much as Japan. Green tea is not as popular as coffee or other types of Korean teas in modern South Korea. The annual consumption per capita of green tea in South Korea in 2016 was 0.16 kg (0.35 lb), compared to 3.9 kg (8.6 lb) coffee. Recently however, as the coffee market reached saturation point, South Korean tea production doubled during 2010‒2014, as did tea imports during 2009-2015, despite very high tariff rate (513.6% for green tea, compared to 40% for black tea, 8% for processed/roasted coffee, and 2% for raw coffee beans).