Hi there, I'm Lago.

大家好，我是Lago

I might be an ageless animation, but you, on the other hand,

我是個沒有年齡的動畫，但你

are getting older everyday. And with old age comes a lot of interesting changes.

每天正不斷的變老，並且隨著年齡產生許多有趣的變化

It's Thursday, so that means we're answering one of your questions.

今天是星期四，所以我們會回答你們問的其中一個問題

And this week, we're gonna find out why does hair turn gray with old age. Let's do this.

這星期我們將要了解，為什麼老了頭髮就會變白，我們開始吧

Let's figure out how hair gets its color in the first place. Hair, like the skin, gets

讓我們了解頭髮是怎麼有顏色的，頭髮跟皮膚一樣

its color from a pigment called melanin.

是從一種黑色素得到顏色

Did you know that melanin formation happens before we were born?

你知道黑色素在我們出生前就形成了嗎?

Did you know that all hair is white before it grows?

你知道所有頭髮在長出來以前都是白色的嗎?

Well, you do now. Dark pigments are called the eumelanin, and light pigments are called pheomelanin,

嗯，你現在知道了，深色的色素叫「真黑素」，淺色的叫「褐黑素」

which blend together to create a broad spectrum of beautiful hair colors.

色素混和在一起，創造出許多漂亮的髮色

These pigments are composed of cells called melanocytes that are positioned on the

這些色素由黑色素細胞組成的，他們位在

skin surface, which the hair follicles grow through.

皮膚表面，而那也是毛囊生長的地方

Melanocytes inject melianin into cells that contain keratin, which the protein of hair is made up of.

黑色素細胞把黑色素注入細胞，而這些細胞裝著角質素，就是製成頭髮蛋白質的角質素

There are many factors that can change the pigment of your hair, both internal and external,

有很多因素可以改變你頭髮的色素，包含內在因素和外在因素

things such as genetics, hormones, age, the climate that you live in, toxins

像是基因、賀爾蒙、年齡、你居住地的氣候、毒素

and even chemical exposure

甚至是暴露在化學因子下

can all affect hair pigmentation. I would check with your parents or grandparents

都可以影響頭髮的顏色，我建議問問你的爸媽或祖父母

and find out when they went gray,

他們的頭髮什麼時候開始變白的

That's when you probably will too. As you grow older, your hair turns gray is the

而你的頭髮也有可能在那個年齡變白。隨著年齡變白的頭髮

result of fail management of melanin cells.

是黑色素細胞失調的結果

They may die or just function improperly. The less melanin you have the

他們可能是死掉了，或者是不恰當的運作，你的黑色素越少

grayer your hair becomes.

你的頭髮就會變得越白

Each hair follicles grow separately and contains its own amount of melanin.

每個毛囊都各自生長，容納著不同數量的黑色素

This is why certain hairs turn gray at different times. There's still no solid

這就是為什麼每根頭髮都在不同的時間變白，目前還沒有明確的

proof as why this happens. More recent studies have shown that hair follicles

證明可以解釋它的發生，許多最近的研究顯示，毛囊

produce small amount of hydrogen peroxide,

會製造少量的過氧化氫

which over time can lead to gradual loss of hair color. I personally would

隨著時間過去，過氧化氫會導致頭髮漸漸褪色，我個人會

take great care over a hairless blockhead any day.

隨時好好照顧我沒有頭髮的"方塊頭" (註：blockhead 也有笨蛋的意思)

Thank you so much for watching. As usual, I'll be answering a new question every Thursday.

非常感謝你的觀看，跟平常一樣，我每個星期四會回答新的問題

So ask anything you wanna know in the comments on Facebook and Twitter.

所以請你問任何你想了解的問題，把它留言在facebook或twitter上

If you like this video, you should definitely click the one that just popped up on the screen or

如果你喜歡這個影片，你絕對要點擊剛跳上螢幕的東西

check the description for the link.

或看看它的描述

"Proof that the pudding is in the eating"

要吃了這個布丁才知道

The meaning behind this expression is that to experience something to the

這句話的意思是，為了徹底了解

fullest you need to try it out yourself,

你必須親自去嘗試

like pudding, try it, you'll like it. Unless you're allergic somehow.

吃布丁吧，你會喜歡的，除非你不知怎麼辦到的對布丁過敏