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Why Does Hair Turn Grey?

  By posted Jun 3rd 2014
Healthy Living

 

hair

 

We’ve all dreaded that first strand of grey hair. And if you’ve assumed that old age would bring about those salt and pepper strands, you are in for a huge shock. Many people grey out at different ages. While most witness their first grey strand in their mid thirties, there are quite a few too who can go grey in their twenties. It makes one wonder, what exactly is this science behind grey hair.

Our hair is originally white. The colours black, brown, blonde etc. that appear is a natural colour that forms because of a pigment called melanin. Pigment cells called melanocytes produce this pigment melanin in the hair. Melanin begins its function since birth and the colour of our hair depends on the distribution of melanin.

When these melanocytes cells stop producing or lessens the production of melanin, it affects the colour of the hair and turns it grey. So grey hair basically depends on ones “melanocytes clock”.

As we age this melanin production gradually decreases and that’s why grey hair is associated with growing old. But other than that there are several internal and external factors that affect grey hair.

Internal factors:

Hormones
Genetics
Lack of nutrition

External factors:
Chemical exposure
Climate
Pollutants
Toxins

 

*Images courtesy: © Thinkstock photos/ Getty Images

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