People all over the world drink tea. It is a mild beverage which people enjoy in the morning when they start their day, and for years it has had reputation for being both safe and almost always beneficial, a drink which will give its consumer a lift without dangerous side effects. It was a drink favoured by temperance organisations who saw far more to fear in alcoholic beverages. Now scientists are suggesting that tea may not be as safe as we had previously believed. Tea contains caffeine, and caffeine has been linked to sleeplessness and to unpleasant jumpy feeling some people get when stressed. More seriously, there is a link with miscarriages, and pregnant women are advised to reduced their intake of tea until after their baby is born. Caffeine is found in tea, but it is larger component of other drinks. Six hundred mg of caffeine is found in six cups of percolated coffee, eight cups of instant coffee and 12 cups of medium strength tea. Chocolate drinks contain about 30 mg of caffeine per glass, so it takes 20 glasses to reach 600 mg. The comparison demands that we know how strong 'medium strength' tea actually is, but medium strength to one person is weak another. It would, of course be possible to devise an objective test which prescribed the exact amount of tea in the pot, the time taken for it to brew, and the differing effects of adding (or not adding) milk or lemon. Most tea drinkers would rightly regard this as a foolish waste of time and would continue to judge the strength of tea they drink by its colour. Many people who drink a lot of tea solve the problem by drinking a beverage from which the caffeine has been removed, decaffeine tea, but others claim that simply doesn't taste right. The sensible course is probably one or moderation: continue to enjoy your cup of tea, but don't enjoy too many!
đang được dịch, vui lòng đợi..
