But aside from the buzz we get from a cup of Joe, there's often another noticeable side effect.

除了我們攝取咖啡能提神以外，往往還有明顯的副作用。

Why on earth does coffee make us have to poop?

到底為什麼喝咖啡會讓我們想要大便呢？

So, it's widely understood that coffee has a laxative effect on some people.

大家都知道通常咖啡會在某些人身上會產生一種通便的效果。

What's not so clear is why?

我們不清楚的是，為什麼會有這樣的效果呢？

For a while, people blamed caffeine but the same effect can be had from decaf as well.

有一陣子，人們歸咎於咖啡因，但無咖啡因咖啡也有這種效果。

Not to mention, people don't commonly have this sort of responds to energy drinks or sodas.

更不用說，人們通常不會對提神飲料或是汽水有這樣的反應。

So, what else is going on in a cup of Joe?

所以，到底咖啡是怎麼一回事呢？

When you drink coffee, it's acidic nature has an effect on your stomach.

當你喝咖啡時，咖啡的酸性會在你肚子裡產生作用。

Coffee cause the stomach to secrete a heightened level of gastric acid, a very acidic fluid that helps your body break down proteins.

咖啡會讓胃大量分泌胃酸，一種幫你拆解蛋白質、極度酸性的液體。

Coffee also contains a compound called chlorogenic acid that increases stomach acid levels.

咖啡內含有另外一種名為綠原酸的混合物，這也會增加胃中的酸性。

This boost in acidity can cause the stomach to dump its content more quickly into the intestines.

這種酸度的增加會使胃加速把食物排至腸子。

This could be one of many contributing factors.

這是造成咖啡通便的因素之一。

It has been proven coffee affects the movement of the large intestine within four minutes of ingestion.

事實證明，咖啡在攝取後四分鐘之內會影響大腸的運動。

Similar with the way large meal does.

就像吃完大餐的感覺一樣。

There are nearly 1000 different compounds found inside a cup of coffee.

咖啡中，有大約一千種不同的混合物。

And while scientists can be certain that at least one of these is the culprit.

而科學家確定在這些混合物中，至少有其中一個會是罪魁禍首。

They still aren't quite sure which triggers the digestive call of arms.

他們還不確定是其中是哪個是引起消化。

On the other hand, they do have a sense of what the mystery chemical or chemicals are actually doing once inside your guts.

另一方面，他們確實能感覺到這些神秘的化學物質在你腸道裡做著某些事。

The body produces these two hormones to help digest food.

身體製造出兩種賀爾蒙，來幫助身體消化食物。

The consumption of coffee decaf or not has been shown to increase the levels of these compounds produced antibodies enhancing their general effects.

無論是否攝取咖啡因都已經證實會加速這些混合物，製造抗體來增強一般的情況。

Gastrin is a hormone that's released help keep the colon up and running at full speed.

胃泌激素是一種賀爾蒙，它的釋出有助於保持結腸正常運轉。

To do that, gastrin activates a process called peristalsis.

因此，胃泌激素會活化腸胃蠕動。

The relaxation and contraction of muscles that happens in waves to help move waste to its final destination.

肌肉的收縮和放鬆在每一方面都幫助移動廢物（殘餘物）至最終的目的地。

Cholecystokinin also causes the release of digestive enzymes and bile which help regulate the process of poop.

膽囊收縮素也會造成消化酶的釋出，而膽汁會幫助調整排便的過程。

By the way, this pooping effect has been shown to only occur in about three-tenths of the population.

順帶一提，這種想便便的效果只會發生在三成的人身上。

So consider yourself special if you're one of those three.

所以如果你是三人之中的那一個，你是特別的。

So, we've kind of got an answer but like many things in the scientific world, we need more time and more science to get the story straight.

因此，我們好像得出了一個結論，但就跟科學世界中的許多事情一樣，我們需要更多時間和更多科學來佐證一件事。

Got any chemistry questions post them down there in the comments.

如果你有任何化學問題的話，在底下留言。

Interested in learning more about poop, check out Gross Science for their video and what we can learn from ancient poop.

如果你對大便還想有更多的了解，看看 Gross Science 的影片，從古老的大便中學習我們到底可以學到什麼，

Also make sure to check out Inside Science TV's new video on how visual illusions work.

另外，也可以去看我們 Inside Science TV's 關於錯視覺如何運作的新影片。

Don't forget to subscribe and hit thumbs up button on the way out.

別忘了訂閱我們，退出之前再按個讚吧！