Coffee and tea are favorite drink a lot of people who both contain caffeine. Number of caffeine content in coffee and tea is very dependent of processing and how menyeduhnya. The longer brewed will create higher levels of caffeine.
As quoted from BBCHealth, Tuesday (28/12/2010) coffee and tea penyeduhannya longer time will make the content of caffeine in these drinks is increasing.
Why coffee and brewed tea caffeine run high?
This is because the coffee or tea brewed longer would cause more and more caffeine out of coffee or tea powder is then moved into the cup.
The process of spending that will semakian much caffeine in the final beverage brewed too long. The picture is a brewed coffee or tea 5 minutes caffeine that comes out the more than coffee or tea is brewed 3 minutes.
Caffeine is one type of alkaloid compounds that naturally sudha contained in coffee beans, cashew leaves, tea leaves, kola seeds, brown seeds dna also some refreshing drinks or soda.
In coffee, coffee bean roasting process also affect caffeine content remaining. Because roasting coffee beans will destroy some caffeine so that levels are lower than the coffee beans are not roasted or time for a little while.
While the caffeine content of tea is influenced by many factors, so is not always black tea contains more caffeine than green tea or white tea has the lowest caffeine content.
The biggest factor affecting the levels of caffeine in tea is part of the tea plant are used. In tea plants, caffeine content of most numerous in the leaf buds, while the old leaves and stems have a lower caffeine content.
However, generally tea contains antioxidants called flavonoids, substances have been shown to help slow or inhibit the chemical reaction caused by free radicals in the body.
Caffeine acts as a stimulant to the heart and central nervous system. In addition, caffeine can also increase blood pressure in the short term and there is no evidence for the long term.
Effects of caffeine on blood pressure are most likely to occur if a person consuming it in excessive amount, or the person is very sensitive. Therefore people who have a history of hypertension and also pregnant women should limit caffeine intake of less than 300 mg per day.
source: www.detikhealth.com
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