Green Tea & Caffeine

So you've heard that green tea is good for you, and have considered trying some out to see what the big fuss is all about. If you have checked out what is on the typical grocery store shelf, you most likely have seen green tea bags of various descriptions. Sitting amongst these is usually a decaffeinated type as well. If one wants green tea but at the same time does not want the caffeine, most people would assume all they need to do is go for the decaffeinated version. Unfortunately, it's not quite so simple. What most people are not aware of is that the decaffeination process pretty much ruins the major health benefits associated with green tea. There are numerous reasons for this, but to understand why you need to have an idea on how green tea is processed. It all has to do with oxygen.
Decaffeinated green tea is just about unheard of in Japan, home of the world's finest green teas. There really is no place in the processing where a decaffeination process would work and not ruin the tea. This processing involves steaming, rolling, and drying, and takes about three hours start to finish.

Although it comes from the exact same species of plant (Camellia Sinensis) as black tea, it is picked and then process immediately to prevent oxidation of the leaves. Green tea, however, is not like that. This gives black tea its unique taste. When you drink regular English tea, those leaves have been exposed to oxygen and fermented that way on purpose. That is from contact with the air, or more specifically, the oxygen in the air.

Notice how it starts to turn brown? Think about what an apple looks like after it's been cut and sitting on the counter for an hour.
Quite often, the second infusion is greener than the first, although it won't be quite as aromatic or tasty. Since nearly all of the caffeine is in the first infusion, getting a quality decaf green tea is going to be better than the best decaffeinated green tea out on the market. As much of a shame as it seems to be to dump the first infusion (which has the most taste and best aroma), rest assured that the 2nd infusion of a high quality loose leaf Japanese green tea, preferably from the first harvest. That said, if it's a caffeine free cup of quality green tea is as simple as brewing an infusion, dumping it, and then re-brewing.

That's slightly less than regular black tea just a fraction of the caffeine in coffee. No, it is possible, but first it's important to know that green tea does not have high caffeine content, only about 30mg per cup. So does that mean one cannot drink decaffeinated green tea?
Based out of Japan, in addition to offering a wealth of information on the health benefits of green tea, O-Cha.com offers a large selection of loose leaf green tea, matcha, and tea brewing supplies. Kevin Moore is the founder of O-Cha.com, one of the internet's first and largest websites dedicated to Japanese green tea.
http://www.o-cha.com
Contact him at
kevinrm@o-cha.com

Green Tea and Polyphenols

What are Polyphenols?
Polyphenols are compounds found in nature. More specifically they are found in plants and provide coloring for some. Their purpose appears to be a potent, natural antioxidant. There are many plants that we consume that contain polyphenols. Concentrations are high in Olive oil and Green Tea and have been the subject of many health articles and promoted to enhance your health.
How do Polyphenols work?
These antioxidants eliminate free radicals, unstable molecules that are the major cause of both aging and disease, in both plants and humans. Free radicals continually attack the body. Free radicals are a normal product of metabolism and result in a process called oxidation. Polyphenols and other antioxidants, including beta carotene (a vitamin A precursor), vitamin C, vitamin E, and selenium, scavenge these free radicals and help to prevent formation of unstable oxygen molecules, known as oxidation. Oxidation can damage healthy cells in the body and have been linked to many diseases including cancer, heart disease and stroke. Polyphenols not only work to prevent diseases but may also help to reduce abnormal cells and inflammation; get rid of cancer causing agents and restore cells back to normal health.
What foods contain Polyphenols?
Unfortunately, polyphenols have a quick life span (short half life) of about 3 hours, thus the scientific reason behind researchers' recommendation to drink green tea a minimum of 8 times a day. EGCG, the most abundant and powerful of green tea's 5 main catechins, is dubbed the 'super antioxidant' because it is 200 times more powerful than the popular antioxidant vitamin E. Just one example is a subgroup of polyphenols, exclusive to green tea, called catechins. These extremely high levels of polyphenols deliver green tea's unique results in several ways.

Green Tea is the #1 source of polyphenols. They include red wine, olive oil, black and green tea. There are many but there are only a few, which contain particularly high levels.
And, research at the University of Geneva, in Switzerland, indicate that green tea raises metabolic rates In addition to caffeine, green tea's catechin polyphenols raise thermogenesis (the rate at which calories are burned) and hence increases energy expenditure. And, research at the University of Geneva, in Switzerland, indicate that green tea raises metabolic rates and speed up fat oxidation. In addition to caffeine, green tea's catechin polyphenols raise thermogenesis (the rate at which calories are burned) and hence increases energy expenditure. And, research at the University of Geneva, in Switzerland, indicate that green tea raises metabolic rates and speed up fat oxidation.

In addition to caffeine, green tea's catechin polyphenols raise thermogenesis (the rate at which calories are burned) and hence increases energy expenditure. And, research at the University of Geneva, in Switzerland, indicate that green tea raises metabolic rates and speed up fat oxidation. In addition to caffeine, green tea's catechin polyphenols raise thermogenesis (the rate at which calories are burned) and hence increases energy expenditure. Not only may green tea protect and heal the body from disease but also clinical trials, conducted by the University of Geneva, in Switzerland, indicate that green tea raises metabolic rates and speed up fat oxidation.
Research is still continuing with green tea and more health benefits continue to be discovered. For instance, EGCG's may one day play a role in treatment of mad cow disease (Nature Structural and Molecular Biology, DOI:10.1038/nsmb743). And the formation of unstable oxygen molecules in the body is unavoidable. Aging, smoke, and environmental pollutants are all sources of the damaging free radicals. Japan and China have benefited from drinking green tea vs. black tea, like the rest of us, for centuries. The west is just now catching on to the benefits of green tea. With green tea being no more harmful than a cup of coffee (and actually containing less caffeine) there's no reason why you shouldn't begin today to benefit from green tea too.
Chemical name:
Various
Also known as:
Green Tea Polyphenols, Green Tea Water Extract, Black Tea Polyphenols, Black Tea Water Extract, Epigallocatechin Gallate (EGCG), Polyphenon E (Mitsui-Norin, Ltd.), Topical Polyphenon E (Epitome Pharmaceuticals Ltd.)
Category:
Phytochemical
More information on the benefits of green tea can be found at
http://www.natural-weight-loss-programs.com/greentea.htm
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Tea Varieties

Oxidation is the reaction of the enzymes contained in tea leaves when they are broken, bruised or crushed. In its most basic form, processing is the taking of the raw green leaves and deciding whether or not, and how much oxidation (or fermentation) should take place before drying them out. It is the processing techniques that produce the four simple tea categories are considered the art of tea making.

Shades in flavor derive from the region of cultivation and the method of processing the tea leaves. If you do like tea drinking, but simply never had the opportunity to learn more about it beyond the fact that you enjoy it, you should know that there are thousands of kinds of tea offered on today's market. Tea is made by steeping processed leaves, buds, or twigs of the tea bush in hot water for a few minutes, a great variety of tea tastes, aromas and colors can excite even the more skeptical drinker. Interestingly enough the 3,200,000 tones of tea produced worldwide come from only one plant species, named "camellia sinensis." But how a plant becomes a beverage?

The second most consumed beverage behind water is tea.
The first category is that of black tea. Black tea is nothing more than the leaves of the camellia sinensis after being exposed to 8-24 hours of open air. After the leaves are picked up they are spread out to let the water they contain evaporate. You have probably witnessed it happening to a flower that is left without being watered. The foliage curls up and begins to dry. After this part of the process, the tea leaves are balled into rolls that encourage oxidization. When fully oxidized, the leaves turn into a rich black color. Tea producers then put the tea leaves into the final drying period before sorting and packaging them.
Oolong tea is another tea category and is considered to be the most difficult of the four types of teas to process. The best way to describe oolong tea is that it is somewhere in between green and black tea. This is because the leaves are only partially oxidized during the processing. As with black tea, the leaves are spread out to dry for 8-24 hours, but after that, they are tossed about in a basket in order to create a bruising and partial exposure to the air. The final step involves steaming the leaves, which neutralizes the enzymes in the tea and prevents further oxidization.
Though the tea leaves are sometimes laid out to dry for a few hours, then, in order to neutralize the enzymes and prevent further oxidation, the leaves are rolled up, still quite green in color. The whole process of creating green tea revolves around preventing oxidization from taking place in the leaves. This type of tea is also lower in caffeine and has higher antioxidant properties. Green teas, like white teas, are closer to tasting like fresh leaves of grass that the other two tea categories.
Finally, white tea has recently become a popular item in the west as it is the least processed tea and thus tastes the most like fresh leaves or grass. White tea is made of the little buds of the tea plant. Again like green tea, white tea is steamed or pan fried to prevent any kind of oxidization, and great care is taken to avoid bruising or crushing the tea. The dried buds have a silver-like appearance because the tiny white hairs of new growth are still present.
John Gibb is the owner of
Tea resources

For more information on Tea check out
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