Green tea is a drink made from the leaves of the Camellia sinensis plant. Unlike black tea, which is authorized to oxidize throughout the production process, turning the leaves black, green tea is produced by heating the leaves, thus preserving the green colour of the leaf and imparting a distinctive flavour and odor, which is frequently described as being grassy. Green tea is frequently promoted as a healthful beverage, potential benefits include protection against cancer, benefits for the digestion, lowering of cholesterol and lowering of the potential risk of coronary disease, and positive effects on the immunity system among other benefits.
Not any of those advantages have been thoroughly explored scientifically, and it might be that some of the preliminary results aren’t supported after further study. There’s a growing body of evidence confirming many of those benefits especially the effect of lowering the potential risk of coronary disease. Even though tea has health advantages and medical uses, it’s consumed mainly as a beverage. Tea, including both green along with other types is usually recognized as safe by the U.S. FDA. Green tea has a considerable absence of serious adverse effects, which is great news for tea drinkers. An excessive amount of anything may have downsides and pose health threats, and tea is no different.
All tea naturally contains caffeine, a nerve system stimulant. Even though the amount of caffeine in tea is usually less than that of coffee, the caffeine content varies greatly among different teas, and also depends upon how a tea is brewed. The amount of leaf used and the time length that the leaves are steeped greatly influences the caffeine content of the brewed cup or pot. The caffeine content per 8oz cup usually varies between 15mg and 75mg, but could be higher or lower depending on preparing strength along with other factors. Caffeine is known to have a number of adverse effects, particularly when large doses are involved.
Mayo Clinic recommends avoiding consuming more than 500mg of caffeine daily in order to avoid adverse effects like insomnia, nervousness, uneasiness, irritability, headaches and anxiety. Very considerable amounts may also result in gastrointestinal problems, fast or irregular heart beat, and muscle tremors.
Finally, regular caffeine use can result in dependence, with mild withdrawal symptoms when discontinued. It’s unlikely that green tea drinkers would consume more than 500mg of caffeine unless they were consuming huge amounts of tea, brewing it very strongly, or consuming it in addition to other sources of caffeine. It’s significant to keep in mind that the sensitivity to the adverse effects of caffeine vary greatly from one person to the next. Some especially very sensitive individuals might find that even a single strong cup of tea makes them jittery.