一个苹果有更多的咖啡因咖啡吗?

根据“古德曼和吉尔曼手册的药理学和治疗,“咖啡因,是一种兴奋剂发现在许多食物,是世界上最广泛使用的精神药物。尽管咖啡的咖啡因含量高,苹果不。因此,有更多的一杯咖啡的咖啡因比一个苹果。有更多的糖苹果比咖啡;然而,这种糖的血糖指数相对较低,因此不会有糖一样快速行动的开始你加到你的一杯咖啡。

咖啡因是发现在许多常见的食物和饮料,包括咖啡、茶、巧克力、苏打水和能量饮料。还发现在大多数减肥药。人们喝咖啡,因为它让他们觉得自己更加清醒通过刺激体内一种特定的分子称为腺苷受体。

一个标准的16盎司。一杯自酿的咖啡有266毫克的咖啡因。相比之下,一个典型的杯茶大约有50至100毫克的咖啡因,而一个典型的瓶装饮料大约有100到200毫克。尽管很难过量咖啡因,它也可以是致命的,与死亡报道超过150到200毫克的剂量每公斤体重。1公斤= 2.2磅。,所以这将是约70杯咖啡一般规模的美国人。

苹果是一个很好的来源,许多营养。举个例子,一个典型的小苹果12%的每日推荐摄入量的纤维,10%的每日推荐摄入量的维生素C和微量矿物质,如钙、钾、锰。然而,苹果并不包含任何咖啡因。

用google搜索“苹果咖啡因咖啡”出现几页的网站链接的地方,在那里人们可以问“苹果含有的咖啡因比咖啡吗?”The misconception seems to stem from the fact that apples have sugar in them -- an average small apple has about 13 g of it -- and that people are equating the energy boost they get from a cup of coffee with the energy boost they presumably get from eating an apple.

基于上面的讨论中,一个更合适的问题可能是“一个苹果有更多的糖比典型的杯咖啡吗?”Presuming you put one to two sugar packets in your typical cup of coffee, and that each sugar packet contains -- as most do -- about 4 g of sugar, the answer is yes, a typical apple contains more sugar than a typical cup of coffee. However, if you compare the glycemic index of apples and typical table sugar -- the glycemic index being a measurement of how quickly an ingested glucose load finds its way into your bloodstream, and hence a measure of how quickly you feel the effects of ingestion -- you'll see that apples, at 38 out of 100, are about half as strong as table sugar, at 68. So if you're looking for a quick energy kick, a cup of coffee is likely to get you there faster. However, an apple is probably your healthiest option.