AFEIL content.
A more recent study in the 2008 Analytical Toxicology Journal examined the caffeine content of a series of teas, and found that they ranged between 14 and 61 mg by 6 or 8 ounces by 6 or 8 ounces, with "no trend Observable at the concentration of caffeine due. To the variety of tea ". [5] Few tea companies have examined the caffeine content of a large number of samples from their teas; One who has, Camellia Sinensis Tea House, found similar results, that the level of caffeine varies widely from one tea to another, and does not show the clear tendencies of caffeine levels in different varieties of teas. [6]
A possible exception to this observation is that it is known that Matcha contains high levels of caffeine, consistently much higher than other teas. This is partly due to higher levels of caffeine on the sheet used to produce matcha, but it is also due to the fact that, because Matcha is a tea powder, the entire tea sheet is consumed to the elaboration, so that It contains a cup of prepared matcha. 100% caffeine on the leaf.
What determines the amount of caffeine in
Honey Ginseng Green TeaA private tea?
Green tea plant with leaves and Bud
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Caffeine protects outbreaks of young tender leaves from
The tea plant being eaten by insects.
There are as many different factors that influence the caffeine content of tea, which is difficult to make precise generalizations about the caffeine content of tea. Caffeine levels vary widely from a particular tea to another. The only safe way to know with certainty, the caffeine level of a particular tea is to test it in a laboratory.
Part of the plant used: leaves, stems or buds / tips
Tea can be made from different parts of the tea plant, and these pieces contain different amounts of caffeine. Leaf leaves (tips) and younger leaves are higher in caffeine than larger and mature leaves. [7] This pattern can be explained by the fact that, for the tea plant, caffeine acts a natural insecticide, which serves to protect the plant against being eaten by insects. Since the tips and tender young leaves are more vulnerable to insects, these parts of the plant are higher in caffeine; The larger leaves are tougher.
And therefore less in caffeine. The teas "Tippy", like the white tea of the golden needle or silver of Yunnan (Bai Hao Yinzhen), are, therefore, higher in caffeine than big leaf teas, such as Lapsang Souchong, a black tea (Souchongs are made of mature leaves) or shou mei, a white tea.
Cultivate or variety of cultivated plant
The cultivar or the specific horticultural variety of the tea plant used to produce tea can deeply affect caffeine levels in tea. The cultivar is independent of the type of tea (green, white, black, oolong, etc.), since different types of tea can occur from the same cultivar. Variation in caffeine content between different cultivars can lead to teas that are grown under similar conditions, with similar appearance and other qualities, having different levels of caffeine.
A roasted oolong, with the dark brown roast, which is used to produce oolongs like this tie, Guan Yin eliminates part of caffeine. Photo by Alex Zorah.
processing, especially toasted
Toast can also reduce caffeine levels in tea, with a greater heavier roasting effect. In the 2005 study mentioned.
Above, it was found that a particular sample of Hojicha, a Japanese roasted green tea, had less caffeine even than some decaffeinated teas. [1]
Oolong teas are usually roasted to different degrees, and may be lower in caffeine, although like all kinds of tea, teas oolong vary greatly in caffeine content. Toasting processes for both Hojicha and Oolongs vary greatly, and the caffeine content of most of these teas has not been widely studied, so it is not safe to conclude that hojicha or roasted oolong is necessarily low in caffeine.
Tea mix with other ingredients
The mixture of tea with ingredients without caffeine to produce flavor teas can cause total total caffeine content, provided that the total tea sheet is less used in the mixture. Tea smell with flowers or flavoring tea with essential oil oils does not add both weight and mix with loose herbs, and therefore does not reduce caffeine content (by weight) of the mixture both.
How to prepare or prepare tea affects the caffeine content
The amount of sheet used and the