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喝茶不仅能提神、明目,而且有帮助消化的作用。当你感到困倦时,喝上一杯清茶,顿时令人轻松舒畅,精神倍增。但是,一杯茶究竟冲泡几次好呢?人们饮用的袋泡红茶、绿茶及花茶,一般都是冲泡1次后就将茶渣弃掉了。因为这种茶叶在加工制造时通过切揉,充分破坏了叶细胞,形成颗粒状或形状细小的片状,茶叶中的有效内容物冲泡时很容易被浸出来。国内北方人喜欢饮花茶,南方人喜欢饮绿茶、红茶,它们含的有效内容物浸出较慢,但据实验分析表明,用沸水冲泡花茶、红茶、绿茶,经3分钟以后,第1次就能溶出可溶物总量的55%左右,第2次冲泡约为30%,第3次冲泡为10%左右,第4次冲泡只有1%～3%。从茶叶含有的维生素和氨基酸被溶出的情况来看,在第1次冲泡时就有80%被浸出,第2次冲泡
Drinking tea can not only refresh, eyesight, but also helps digestion. When you feel sleepy, drink a cup of tea, suddenly relaxed and comfortable, double the spirit. However, how many times does a cup of tea brew well? People drink tea bagged black tea, green tea and tea, usually after brewing 1 will be discarded tea. Because this kind of tea leaves through cutting and rubbing during processing and manufacturing, it completely destroys the leaf cells and forms granular or small flaky shape, and the effective contents in the tea leaves are easily leached out when brewing. Domestic northerners like to drink tea, southerners like to drink green tea, black tea, the effective content of their leaching more slowly, but according to experimental analysis, brewing tea with boiling water, black tea, green tea, after 3 minutes, the first About 55% of the total amount of solubles can be dissolved, about 30% for the second brewing, about 10% for the third brewing, and only 1% -3% for the fourth brewing. In the case of dissolution of vitamins and amino acids contained in tea leaves, 80% is leached at the first brewing, and the second brewing