请大家谨慎选择碳水化和物－－导致肥胖和糖尿病的罪魁祸首碳水化合物是身体主要的能量来源，它存在于很多食物当中，糖，面粉，米饭，水果蔬菜，各种糕点面包，薯条，各种甜的饮料,就算是在动物的肝脏＆肌肉中，碳水化合物也以肝糖的形式存在，所以碳水化合物是我们最容易获得的营养素，一般人都不会缺乏，但是很多人对碳水化合物并不了解。 我们吃下去的各种碳水化合物，最终被消化分解转化成葡萄糖，然后进入血液，称为血糖，细胞可以从血液里面获得血糖来得到能量。正常的血糖浓度是100ml的血液里面含有80mg到120mg的血糖。血糖浓度决定了我们的食欲，当血糖浓度低于75毫克时，人会感到饥饿，发出进食的指令，并开始分解肝脏和肌肉里面的糖原，当血糖浓度升高时，血糖会被转化成肝糖元，暂时储存在肝脏和肌肉里面，当然，肝脏和肌肉储存糖原的能力是有限的，当我们一次吃进太多的碳水化合物，超过肝脏和肌肉的储存能力时，会发生什么情况？―――过高的血糖会刺激胰岛素的分泌，并且在胰岛素的作用下被转化成脂肪储存起来。 换句话说，当我们吃进过多的碳水化合物，实际上是发出一条信息，通过胰岛素传给身体，那就是――储存脂肪。更糟糕的是，胰岛素含量的提高，不仅使身体把碳水化合物转化成脂肪 (more...)

the feeling of "胃部空空如也" is an indirect result of 血糖低in other words, you cannot feel "血糖低", but low blood sugar level can stimulate a long chain of mechanisms which finally result in stomach contracting and digestive juice secretion. the feeling of "胃部空空如也" is stomach contracting & digestive juices secretion. So, a glass of water will dilute digestive juice and transiently inhibit stomach contracting which makes you feel not so hungry for a moment. However, if the long chain of mechanisms which links "血糖低" and feeling of "胃部空空如也" is somehow blocked, one will not feel hungry even if blood sugar level is very low; by contrast, if the long chain of mechanisms will be somehow stimulated without the signal of "血糖低", one will still feel hungry even if his blood sugar level is very high