Your Hair

What causes your hair to be the color it is?
What happens in your head that makes your hair the color it is? Where does the color go when you get older and you get gray hair?
I am no scientist but I know it starts in your genes . Each hair on our heads is made up of two parts:a shaft – the colored part we see growing out of our heads
a root – the bottom part, which keeps the hair anchored under the scalp
The root of every strand of hair is surrounded by a tube of tissue under the skin that is called the hair follicle (say: fah-lih-kul). Each hair follicle contains a certain number of pigment cells. These pigment cells continuously produce a chemical called melanin (say: meh-luh-nin) that gives the growing shaft of hair its color of brown, blonde, red, and anything in between.
Melanin is the same stuff that makes our skin’s color fair or darker. It also helps determine whether a person will burn or tan in the sun. The dark or light color of someone’s hair depends on how much melanin each hair contains.
As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color – like gray, silver, or white – as it grows. As people continue to get older, fewer pigment cells will be around to produce melanin. Eventually, the hair will look completely gray.People can get gray hair at any age. Some people go gray at a young age – as early as when they are in high school or college – whereas others may be in their 30s or 40s before they see that first gray hair. How early we get gray hair is determined by our genes.
Gray hair is more noticeable in people with darker hair because it stands out, but people with naturally lighter hair are just as likely to go gray. From the time a person notices a few gray hairs, it may take more than 10 years for all of that person’s hair to turn gray.
Willow Smith – Whip My Hair
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