隔夜茶为什么不能喝?

本文导读 @励新茶博
你知道吗

    饮茶好处多,众所周知。但按一般习惯或茶道来说,喝茶都是现泡现喝,很少喝冷茶,更不喝隔夜茶。这是因为隔夜茶合有影响健康的茶锈一些杂质。

    茶叶中含有茶碱、咖啡因、黄嘌吟、鞣酸和微量元素氟等,这些是对人体健康有益的物质。另外,还含有茶多酚类物质,这种物质在空气和水中极易氧化成棕色的胶状物——茶锈。茶锈中含有镐、铅、铁、砷、汞等多种物质。没有喝完或久留在茶杯中的茶水,如隔夜茶,暴露在空气中的时间越长,茶多酚氧化成茶锈的量也越多。茶锈进入人体,与食物中的蛋白质、脂肪和维生素等结合、沉淀,阻碍营养物质的吸收和消化。这些氧化物质一旦进入人体,还可使肾脏、肝脏和胃等器官发生炎症、溃疡、坏死等病变。

    所以,隔夜茶不能喝,而且茶具也应经常擦洗哦。





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