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Humans lose up to 100 strands of hair a day, but we do have quite a lot of hair to start with.
人類每天最多會(huì)掉100根頭發(fā)，但我們本來發(fā)量就很多。
There's some variation depending on hair colour but for an average adult the strand count is 100,000, so losing 100 a day is not too bad.
根據(jù)發(fā)色不同，發(fā)量也有所不同，對(duì)于普通成年人而言，發(fā)量為10萬根，所以一天掉100根也沒什么。
Although this is the average, people with red hair have around 80,000 strands, black or brown hair 100,000 and blondes have about 120,000.
盡管這是一般情況，紅頭發(fā)者發(fā)量約在8萬根，黑發(fā)或棕發(fā)者在10萬根，金發(fā)者約有12萬根頭發(fā)。
So hair used to be important for the reasons I mentioned earlier, but nowadays I'd say the main importance of hair is the fact that it is big business.
毛發(fā)一度起重要作用，此前我也已提及原因，但現(xiàn)在來說，頭發(fā)的重要性主要體現(xiàn)在其（衍生的）大型產(chǎn)業(yè)。
Apart from the money involved in hair cutting, shaving, trimming, etc., a fortune is spent just on hair products.
除去剪發(fā)、剃須和修剪等等的費(fèi)用以外，人們?cè)诿腊l(fā)產(chǎn)品上也投入了一大筆錢。
In the UK alone, consumers spend over five billion pounds each year on these.
僅僅在英國(guó)，消費(fèi)者每年花費(fèi)超過50億英鎊購(gòu)買美發(fā)產(chǎn)品。
So next, I'd like to just give you a quick overview of the structure of hair.
接下來，我想給你們大概講講頭發(fā)的結(jié)構(gòu)。
As you can see, along the length of the hair, there are three main parts called the bulb, the root and the shaft.
正如你們所見，順著頭發(fā)長(zhǎng)度不同，主要分三個(gè)部分，分別是毛囊、毛根和毛干。
A single hair is fixed at one end below the skin in the bulb. The bulb acts rather like a cap - it encloses the end of the hair in the head.
每根頭發(fā)都由皮膚以下的毛囊固定住其中一端，毛囊的作用有些像一個(gè)箍，將頭發(fā)緊附于頭皮。
The next part of the hair is the root and this is the part of the hair which lies just beneath the skin and, in terms of hair production, is the most important.
下一部分為毛根（發(fā)根），這部分就在表皮以下，對(duì)于生發(fā)來說，起最關(guān)鍵作用。
This can be considered the control centre for each strand of hair and is where the glands are found.
我們可將這部分當(dāng)作每根頭發(fā)的控制中心，腺體也在此分布。
These produce oil which flows along the length of the hair and the health of the root determines the overall health of the strand of hair.
這些腺體分泌油脂，順著頭發(fā)流動(dòng)，發(fā)根健康程度決定該根毛發(fā)的總體健康。
The last part is the shaft and this is the hair which is above the skin and is, of course, what we can see.
最后就一部分是毛干，這是皮上的毛發(fā)，也就是我們能看見的毛發(fā)。
Fortunately, this is not active, and I say "fortunately" because otherwise it would be very painful to have your hair cut!
幸運(yùn)的是，這部分極不活躍。我說“幸運(yùn)”，是因?yàn)槿裘珊芑钴S，要理發(fā)就會(huì)變得非常痛苦。
And finally I'd just like to go over a few factors that impact on the overall health of hair.
最后我想講講影響頭發(fā)整體健康的幾個(gè)因素。
Like every other part of the body, our diet (that is what we eat) is extremely important to the condition of our hair.
就和身體的其它部位一樣，我們的飲食（即我們吃的是什么）對(duì)于頭發(fā)的狀態(tài)說至關(guān)重要。
But whereas a change in your diet to, for example, eating unhealthy foods will soon be noticeable in your skin, changes to your hair will take a lot longer.
但盡管飲食的改變會(huì)明顯反映于皮膚（例如吃不健康的食品），對(duì)頭發(fā)的影響則需要經(jīng)過較長(zhǎng)時(shí)間才能體現(xiàn)。
A change in diet today could take several months to have an effect on your hair.
現(xiàn)在，飲食的變化要經(jīng)過數(shù)月時(shí)間才會(huì)影響頭發(fā)狀態(tài)。
And so what is the key to healthy hair? Well, eating a balanced diet is the most important thing.
那頭發(fā)健康的關(guān)鍵是什么呢？飲食均衡是最重要的。
There are a number of vitamins that are vital for good hair health, the main ones being vitamins C, D and E, and in a balanced diet all these vitamins should be readily available.
有好幾種維生素對(duì)于健康頭發(fā)都是必不可少的，主要是維生素C，D和E，均衡的飲食中應(yīng)同時(shí)包含這些維生素。
If you need a boost of vitamin C, for example, one of the best things to eat are blueberries.
例如，如果你需要大量補(bǔ)充維生素C，最好吃點(diǎn)藍(lán)莓。
For vitamin D, the best examples are fish, mushrooms and eggs and for vitamin E, nuts and seeds. Right, let's go on to...
要攝入維生素D，最好吃點(diǎn)魚、蘑菇和雞蛋，維生素E則是堅(jiān)果和種子。好了，接下來…
