胡萝卜能让你在黑暗中看清东西吗？

Simply put， yes and no. Carrots have Vitamin A， which is also known asRetinol1. Retinol is what your body needs to make Rhodopsin2. This is the pigment3in your eyes which works in low-light places and makes you to see better in the dark.

If you were short of Vitamin A or Retinol， then eating a lot of carrots would be agreat way to work this out， but only to the point of a healthy person. And eatingcarrots for a healthy person would only help little when you see something in dark.You don’t need to eat too many carrots like a rabbit.

Where did this “fact”come from？ Is it a rumor4 made to get kids to eat theirvegetables？ Or is it a piece of public health information？ Well， no. Like many otherrumors it was government propaganda5. Well， a step up from that actually， it waswartime6 government propaganda.

During the early years of World War II， The Battle of Britain was taking placeover the United Kingdom and the Germans were bombing7 the British cities. Eachnight in the dark the Germans crossed the channel8 in the planes and tried to bombthe British cities out.

However， a new invention9 known as Radar was helping the British find out theenemies10 and fight in time. The British did not want the Germans to notice this. Sothe Air Ministry ordered a lot of newspapers to say that their pilots were eating lotsof carrots to help them see much better at night

It was so well done that not only did they fool the Germans， but they also managed to fool the British people and that’s where the“fact”came from.

简单地说，能，也不能。胡萝卜含有维生素A，也被称为视黄醇。视黄醇是你的身体制造视紫红质所需要的，它是眼睛中的一种色素，会在光线较暗的地方起作用，让你在黑暗中看得更清楚。

如果你缺乏维生素A 或视黄醇，那么多吃胡萝卜是解决这个问题的好方法，但只能达到健康人的水平。对于一个健康的人来说，多吃胡萝卜对你在黑暗中看东西的帮助也不大。你不需要像兔子一样吃太多胡萝卜。

这个“事实”是从哪里来的呢？这是为了让孩子们吃蔬菜而炮制的谣言吗？或者是一条公共卫生信息？唔，不是。就像许多其他谣言一样，这是政府的宣传。事实上，这是战时政府的一次宣传。

第二次世界大战初期，英国发生了不列颠战役，德国人轰炸了英国的城市。每天晚上，德国人都在黑暗中开着飞机穿越（英吉利）海峡，试图轰炸英国的城市。

然而，一种名为雷达的新发明帮助英国人及时发现敌人并进行战斗。英国人不想让德国人注意到这个发明。于是，空军部命令多家报纸宣称，他们的飞行员吃了很多胡萝卜才能在晚上看得更清楚。

这场宣传做得太好了，他们不仅愚弄了德国人，还愚弄了英国人民，这就是该“事实”的由来。