TIL what causes our hair to turn white or grey when we get older

in #science8 years ago

                   

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What is hair?

Hair is one of the defining characteristics of mammals.  Our hair is a keratin filament that grows.  It also regrows from follicles scattered throughout our bodies.  There are numerous factors that can affect normal hair growth.  These include androgens, nutrition and our genetic material.  Androgens are the main regulator of human hair follicles.   

What are androgens?

Androgens is in fact male hormones.  Both men and women produce this hormone, but obviously in different amounts.  The principal androgens are testosterone and androstenedione.  These are present in much higher levels in men and play an important role in male traits and reproductive activity. 

Hair growth

There has always been a parallel connection between our bodily aging process and the growth of hair.  There are three stages of hair growth.  The Anagen, catagen and telogon phases.  Once a cycle is complete it restarts and a new strand of hair begins to form.   

Can you make your hair grow faster?

Hair grows at about 1.25 centimeter per month or 15 centimeter per year. Ironically to grow your hair, you need to cut your hair every ten to twelve weeks.  If you can prevent split ends and use good conditioner that might help.  Taking a good vitamin supplement might help but other than that you just have to wait it out.  It takes time to grow your hair.  

When do our hair turn grey or white?

                                                        

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All hair is originally white.  It gets pigment, melanin, through specialized cells called melanocytes. Melanocytes are mature melanin forming cells.  Typically in the skin. We get our hair color when these cells pump a pigment into the hair follicles.  Melanin has two predominant types.  Dark pigment or light pigment.  These combine in various proportions and produce a huge range of hair structures.  

The combination is mainly determined by our genes.  Melanocytes starts their secretion even before our birth and that function regresses with age.  It keeps on decreasing and after the age of thirty, decreases function by ten to twenty percent.  Why and how the function lessens is a complete mystery. 

Some scientists believe that our hair follicles have a ‘melanogenic clock’  that regulates hair pigmentation with age and hence, minimizes it with aging. Grey hair is a precursor of white hair, and contains less or no melanin at all due to inactive melanocytes. 

Genes and DNA plays an important role in hair color.  So if you are turning grey at a young age, you should blame it on your parents.  

 What causes baldness?

                     

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The cause of baldness is mainly due to genetics.  Male pattern baldness is once again associate by the male sex hormones called androgens.  It usually has no medical ill effects, so if you are losing hair at an alarming rate, then there might be an underlying medical cause and you should go and see a doctor.  

Why is everyone so unhappy with their hair?

                                           

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Some people always complain about their hair.  If they have curly hair, they want straight hair and if they have straight hair they want curly hair.  The mere fact that you have hair should be a blessing!  There are so many promising hair products out there, but none of them really works. Make sure to wash your hair at least twice a week.  (Yes that is enough) and use a good conditioner.  Also be sure to eat enough healthy foods, and take in your prescribed vitamins per day to ensure proper hair- health.  

If you are healthy your hair should be healthy!

 Here are some nutritious foods that you can eat to keep your hair healthy.  

  • Spinach.
  • Greek yogurt.
  • Salmon.
  • Cinnamon.
  • Oatmeal.
  • Guava.
  • Eggs.
  • Lentils

One good thing about hair is that it grows out again.  Should you have a hair disaster, chances are that you will have proper hair again soon.  Just wait it out. 

Funny hairstyles

                                 

Image source

                                                    

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Research references:

https://en.wikipedia.org/wiki/Human_hair_growth

http://www.cosmopolitan.com/style-beauty/beauty/advice/a36065/tricks-for-growing-your-hair-really-really-long/

http://gaizupath.com/what-causes-white-hair/

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Thanks a lot for sharing with the Steemit community information, in a such clear way, on this hairy and baldy topic!

As a bonus, and in addition to resteeming for exposure, we are awarding you a small 10 Steem Power deposit as a thank you for creating quality STEM related postings on Steemit. We hope you will continue to educate us all!

Good choice! I really like the post.

I thank you very much!

I definitely learned something with you post! Very informative, very clear, and I like the last pictures :)

Thank you @lemouth! Teacher always comes out somewhere...lol!

I think I must also grow my own built in cap.

Very informative post. I was in my fifties when my hair started turning grey. The colour never bothered me as I was lucky and still am because I have never lost any hair unlike a lot of young people today

Oh I am so lucky to have received good "genes" from my grandmother's side. She never had grey hair. Just a few in front and on the sides. My mother on the other hand was in her twenties when she started going grey. My husband is losing his hair rapidly and he was also in his twenties when he started to turn grey. Luckily I love grey hair. Doesn't bother me at all, just NOT on myself. LOL!

I know that! I'am salt and peper!

Love it! Not on myself but on everyone else!😂

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