And people have experienced caffeine withdrawal for up to three days.

人们经历了长达三天的咖啡因脱瘾。

Just, please, bear with me if I display symptoms of caffeine withdrawal.

不过，如果我出现咖啡因戒断反应你们一定要包容我。

Now, scientists aren't exactly sure about the biochemistry behind caffeine withdrawal.

现在，科学家们对咖啡因脱瘾背后的生物化学理论还无法完全确定。

Consuming coffee regularly does leave you susceptible to experiencing caffeine withdrawal if you stop suddenly.

如果你突然停止喝咖啡，经常喝咖啡确实会让你很容易出现咖啡因脱瘾症。

So expectations might have some impact on your symptoms, but caffeine withdrawal definitely has a physiological impact too.

所以“期待理论”也许确实会对你的症状产生影响，但是咖啡因脱瘾同样也会产生生理上的影响。

These are caused by other health problems, with triggers ranging from dehydration and caffeine withdrawal to head and neck injury, and heart disease.

这些是由其他健康问题引起的，触发因素包括脱水和咖啡因戒断、头部和颈部受伤以及心脏病。

But a 2004 review of over 50 papers from medical literature found that at least some studies of caffeine withdrawal were sufficiently designed to keep expectancy from affecting their results.

但是在2004年一份对超过50篇医学文献的综述中提到，至少有一些关于咖啡因脱瘾的研究可以充分被用来证明“期待理论”并不影响他们带来的反应。

He wrote: 'Indeed, newborn infants of caffeine-consuming mothers have been reported to experience caffeine withdrawal symptoms including disturbed sleep, vomiting, increased frequency of irregular heartbeat and respiration, and increased fine tremors'.

他写道：“事实上，据报道，摄入咖啡因的母亲的新生儿会出现咖啡因戒断症状，​​包括睡眠不安、呕吐、心跳和呼吸不规则频率增加，以及细微颤抖增加。”