红茶加奶降低保健功效,可搭配蜂蜜或糖

喝茶有益健康是因为茶叶中的一种叫做类黄酮的抗氧化物.它有助于血管扩张,可降低人们患心脏病和中风的风险.茶叶还具有抗癌功能.德国研究人员发现如果在喝茶是加牛奶,则会大大降低茶叶的保健功效.
德国科学家进行了一项试验。他挑选了16名健康状况良好的更年期后妇女作为测试对象。试验期间，这16名妇女被分成3组，分别饮用不加牛奶的红茶、加入10%脱脂牛奶的红茶和白开水进行对比。结果发现，与喝白开水相比，人喝红茶可以显著提高血管扩张功能，而牛奶则会完全抵消红茶的这种功效。
茶叶中还含有儿茶酚,这种化合物可帮助人体有效预防心脏疾病,牛奶中的一种叫做干酪素的蛋白质会破坏儿茶酚,从而降低茶的保健作用.同时,牛奶会改变茶叶中某些活性成分的性质,导致降低茶叶的抗癌功效.
要想改变红茶的口感,又不破坏营养成分,可以在红茶中加入蜂蜜或者糖.
红茶中除了含有丰富的水溶性维生素外,还富含K元素,冲泡后可溶解出70%的钾元素,钾有增强心脏血液循环的作用,并减少钙在体内的消耗.红茶中的锰是骨组织必需的元素,因此常喝红茶可促进骨骼强健.
红茶和蜂蜜均有杀菌消炎的作用,蜂蜜有很强的抗氧化性,这一特性使它具有清除体内自由基的功能,具有葆青春抗衰老的功效.
人在没吃饭的时候饮用绿茶会感到胃部不舒服，这是因为茶叶中所含的重要物质——茶多酚具有收敛性，对胃有一定的刺激作用，在空腹的情况下刺激性更强。而红茶是经过发酵烘制而成的，茶多酚在氧化酶的作用下发生酶促氧化反应，含量减少，对胃部的刺激性就随之减小了。另外，这些茶多酚的氧化产物还能够促进人体消化，因此红茶不仅不会伤胃，反而能够养胃。

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