比如说，如果你有IBS (Irritable Bowel Syndrome) –易激肠胃综合症，一个重要的tip是应该避免冰冷的食物（就是从冰箱里取出来直接吃的那种）：
http://www.helpforibs.com/diet/how_to_eat.asp
Easy IBS Diet Tips & Tricks
* Eat soluble fiber first whenever your stomach is empty
* Chew thoroughly. This will help prevent you from eating too fast and swallowing air, which can trigger IBS problems.
* Eat at a leisurely pace - if you must eat in a hurry, serve yourself half portions.
* Eat small portions of food, and eat frequently - the emptier your stomach is, the more sensitive you will be.
* Avoid eating large amounts of food in one sitting as this can trigger an IBS attack
* Avoid ice-cold foods and drinks on an empty stomach. Cold makes
muscles contract, and your goal with the IBS diet is to keep your
stomach and the rest of your GI tract as calm as possible.
（翻译：避免空腹摄入冰冷的食物或者饮料。冷温让肌肉收缩，而你的IBS饮食的目的是让胃子和肠胃系统的其他部分尽量保持平静）
* Avoid chewing gum, as it causes you to swallow excess air, which can trigger problems.
...
如果你没有类似的肠胃毛病，冰冷的食物应该没有什么问题。那些坐月子不能吃冷的，纯粹是迷信的说法。
但是就算事健康的人群，也有自己的所好。我个人喜欢温水。
美国人非常喜欢冰的东西，水里面也要加冰块。英国人不一样，有人说英国人喜欢喝温啤酒 (warm beer), 但是现在被认为是谣言。他们的啤酒是以酒窖温度 (cellar temperature)饮用。但不论如何，都不像美国人一样到处放冰。
我觉得我们应该以科学的态度来对待饮食，既不要盲目相信传统，也不要过分模仿西方的做法。
我在这个论坛上看到有些中国人冬天到英国旅游，叫冰水喝，让人家麻烦。如果你真的是非常喜欢喝冰水，也罢了。但是希望不是刻意表现什么东西。
我个人喜欢温水。
.
