Flavan-3-ols, the type of flavonoids found in green tea and other teas, provide many of the anti-aging effects of green tea. Catechins in various types of teas are the polyphenols that seem to have the most potent antioxidant effects, according to Natural Standard, the leading and most respected reviewer of herbal compounds. Specific flavan-3-ols found in green tea include monomers (catechins) called:

Domestic Process: This is a very simple process. It involves repeated steeping of tea in hot water and the disposal of the water (you may use this tea to serve those who don’t mind having caffeinated tea). The more you repeat the process, the less caffeine there will be left in the tea, but the same is true of the taste and flavor. Basically, don’t overdo it. Two or three steepings are probably safe. After all, you do want tea and not plain, hot water, right?
Most detox teas contain caffeine, probably because this stimulant may suppress appetite, trigger your digestive system to let go of waste, and help you shed water weight. A caffeine-induced energy boost may also lead to working out a little longer or harder than usual. However, too much caffeine can also be risky (see above) and interfere with getting enough sleep–and catching too few zzzs may ultimately undo the tea's weight-loss effects. In fact, too little shuteye has been shown to trigger excessive eating and weight gain and even slow metabolism, which can make it easier to gain weight even if you don't eat extra calories. A good rule of thumb, regardless of where your caffeine is coming from, is to nix it at least six hours before bed. And if you're trying to shed pounds, commit to making adequate sleep a top priority.

Green tea can help you lose weight. Several studies have suggested that the flavonoids and caffeine in green tea can help elevate metabolic rate, increase fat oxidation and even improve insulin activity. One study showed that those who consumed green tea and caffeine lost an average of 2.9 pounds during a 12-week period, while sticking to their regular diet. Another study suggested the increase in calorie output was equal to about 100 calories over a 24-hour period.
Because matcha is incorporated into water (whereas other green teas are steeped in water), you consume the entire leaf—and thereby the full effects of its antioxidants, vitamins, and caffeine. Fans say matcha provides a calmer, more sustained energy burst than coffee or espresso, and since it’s less astringent, it mingles more readily with fruit, yogurt, and herbs in wake-up drinks like smoothies and juices.
What I will tell you is that there are a LOT of options for these fitness teas. I did a lot of research before purchasing one, so my best advice to you is to make yourself a list of available options (see below), determine what you hope to gain from the experience (see even further below), and then research the specific ingredients for yourself. Here’s the moral of the story: They’re all very similar, but it’s important to be aware of what you are personally putting in your own body. Disclaimer: What works for one may work differently for another — so take your research seriously.
^ Jump up to: a b Onakpoya, I; Spencer, E; Heneghan, C; Thompson, M (August 2014). "The effect of green tea on blood pressure and lipid profile: a systematic review and meta-analysis of randomized clinical trials". Nutrition, Metabolism, and Cardiovascular Disease (Systematic Review & Meta-Analysis). 24 (8): 823–36. doi:10.1016/j.numecd.2014.01.016. PMID 24675010.
If you do choose to try a tea detox, the most important aspect isn't the kind of healthy tea you choose—it’s what else you eat: “Tea can only be medicinal and detoxifying if your diet isn’t taxing your system, which most American meals are guilty of,” says Lagano. In order to truly detoxify your body, cut processed and fried foods, and up your intake of fruits, vegetables, whole grains, lean proteins, and anti-inflammatory fats like avocados and almonds, says Villacorta. Once your diet is clean and gentle on your body, detoxifying teas can begin to enhance your natural organ function.
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Most importantly, EGCg and other catechins counteract the effects of free radicals from the likes of pollution, UV rays, radiation, and chemicals, which can lead to cell and DNA damage. Since over 60% of the catechins in matcha are actually EGCg, a daily matcha regimen can help restore and preserve the body’s integral well-being and balance. Read more on our Change The Odds Page.

Grown under shade for three weeks prior to plucking, gyokuro is one of the most exclusive varieties of tea produced in Japan.[60] The shading technique imparts a sweeter flavor, and produces a particularly rich color thanks to the higher amounts of chlorophyll in the shaded leaf. Gyokuro tea is associated with the Uji region, the first tea-growing region in Japan. It is often made using smaller-leaf cultivars of the tea plant.[61]
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