推荐回答(5个)
隔夜的茶就不应该喝了,茶叶泡了几天就更不喝了。
隔夜茶会产生茶多酚,而茶多酚氧化后,会使茶颜色变深,然后会在茶具上形成茶锈,对人的健康也是不好的。
另外,隔夜茶也有亚硝酸盐的问题,同隔夜饭菜有相似的地方。但茶叶里的亚硝酸盐含量非常低,不足以对人的健康造成影响。茶放置时间长了,表面会产生一些有光泽的东西,这不是重金属,是多酚类物质氧化后产生的。
值得一提的是,喝茶有不少讲究,比如绿茶,一般不建议放太长时间,因为绿茶里的茶多酚、氨基酸、茶多糖等营养物质,会在1个小时内慢慢地渗出来,如果时间过长,这些营养物质就会流失。
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扩展资料
饮茶的误区
1、是茶皆用沸水泡
很多人都是用滚烫的沸水来冲泡茶叶,其实冲泡方法应该视茶叶种类而定,并不一定都用沸水。比如花茶、红茶、乌龙茶最好用沸水冲泡;紧压黑茶则适合沸水冲泡或煮开;茶砖则需敲碎之后再煮开,以便充分发挥茶水品质;至于绿茶,则不适合用沸水,应该用85℃左右的热水冲泡,以免影响茶水的鲜香味。
2、常年只饮一种茶
有的人爱喝一种茶,便常年不变地喝同一类茶。其实,季节不同,人体的自身感受与身体机能也会发生相应的变化,选用的茶品也应该随之改变。
参考资料来源:/health.people.com.cn/n1/2019/0705/c14739-31215490.html"target="_blank"title="人民网—隔夜饭、隔夜茶究竟会不会致癌">人民网—隔夜饭、隔夜茶究竟会不会致癌
参考资料来源:/health.people.com.cn/n1/2016/1108/c404177-28844573.html"target="_blank"title="人民网—饮茶的三大误区,您究竟中了几招?">人民网—饮茶的三大误区,您究竟中了几招?
应该是泡的第2天就不能喝,泡的前一天晚上应该给它倒掉
泡到第2天,杯子会含有很多的茶碱
不然杯子很难清洗,而且喝到肠壁上起不到保护肠胃的作用
荼叶可以冲调几回,冲调多久与众多要素相关。第一看料,是啥茶,第二看料的特点,看性柔或烈或香或平,第三看加料,不一样的茶有不一样的加料标准,(在于冲调器皿尺寸),第四看本人对冲调的茶的口味爱好,总得来说:依据不一样的茶,来决策,投茶量,冲调时间,温度。
从其营养元素(荼叶中的维他命和碳水化合物)看来,第一次冲调就会有80%的量被浸取,第二次冲调时约15%,经三次冲调后,基本做到全量浸取。
再从荼叶冲调的香味和味儿的具体情况看,一煮茶香味浓厚,味儿醇正;二煮茶虽浓厚,但味醇正比不上前;三煮茶香味和味儿已淡乏;倘若再经冲调则会越来越没有味儿,如同喝白开水同样。
据测定,一般茶泡第一次时,其可溶物质能浸取50%—55%;泡第二次,能浸取30%上下;泡第三次,能浸取10%上下;泡第四次则寥寥无几了。从营养成分视角而言,荼叶中的维他命C和碳水化合物第一次冲调时就会有80%浸取,第二次冲调后95%以上早已浸取。别的成分如茶氨酸、咖啡因等,也全是第一次浸取量较大,历经三次冲调后,基本做到全量浸取。
荼叶泡多久喝最好是?有些人说15秒,有些人说30秒,也有人说60秒吧……或许是90秒。实际上,简易的依照机械设备的数据来分辨,是没有一切实际意义的,由于荼叶的老嫩水平、深度加工时的揉捻水平及其烘焙缺水状况不一而足。
一般说来,在荼叶和水的占比在1:15~1:30上下时,基本荼叶(暂无论茶系)冲调的侵泡时间不超过1分钟,汤色较为深浅鲜美。假如较为小,如1:100,则要侵泡3-5分钟。换句话说,比和侵泡时间反比。但也是有下限和高限,便是:荼叶放的太少,再如何增加侵泡时间,汤色也不好喝;而放了过多的荼叶,汤色也不易泡好吃。
此外,煮茶的时间过短,荼叶中的维他命C、咖啡碱及碳水化合物等水溶的合理物质就没法被水融解,荼叶因而无法充分发挥它需有的作用。但是,荼叶泡得时间长时间亦会在侵泡中造成过多的咖啡碱会对身体造成刺激,茶叶茶亦会出现涩味,对身体反倒危害。所以说,煮茶这件事情,还简直最能体现中国传统文化的审美观念:中合之美,适合最好是。
泡好的茶,一般一天之内没有量,是可以喝的,这个不会引起变质,可以放心饮用!
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