Certain genes can be switched off to prevent melanocytes from maturing.

某些基因可以被关闭以防止细胞成熟。

The melanocytes make the pigment, which is then packed into small packets of pigment called melanosomes.

细胞制造色，然后将其包装成称体小包色。

Hair color comes from melanin, a pigment made by special cells called melanocytes.

发色源自色，这种色由名细胞特殊细胞生成。

But as we age, there's declining levels of catalase, and this allows the build-up of hydrogen peroxide in the hair bulb, which damages and destroys the melanocytes, or the pigment producing cells, of our hair.

但随着年龄增长，过氧化氢酶水平会下降，这使得氢过氧化物在毛囊中积累，从而损害并破坏产生色细胞。

And it doesn’t affect melanocytes, so for young people, the hair that falls out grows back its normal color.

而且它不会影响细胞， 因此对于年轻人来说， 掉下来头发会长出原来颜色。

How long your melanocytes last—and therefore when you “go gray”—is mostly determined by your genetics.

你细胞能存活多久——因此你什么时候“变灰” ——主要由遗传因决定。

Each hair gets its color from melanin, a pigment made by specialized cells called melanocytes in hair follicles.

每根头发颜色都来自色， 这是一种由毛囊中专门细胞——细胞制造色。