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Everything you wanted to know about hair

The average adult human body has 5 tens of millions of hairs, including one hundred zero to one hundred and fifty 0 on the scalp. True blondes have more hair on the scalp - one hundred and forty zero hairs than brunettes (105 zero hairs) or redheads (90 zero hairs). Hair is made up of a protein called keratin. Keratin is also a constituent of our nails. 

 * Hair in the world 

 Hair color and texture differ across the world. Asians have jet black hair while Scandinavians have varying shades of browns and reds to pale blond. There are generally three racial groups with three kinds of hair.

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• 1. Oriental - The Japanese and Chinese have smooth, black hair.  
• 2. Caucasoid - This group is varied and a mixture of several racial groups. Hair colors range from black to blonde. Hair can be wavy or straight. 
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•  3. African - Africans have very curly black hair. It is woolly and dry. Heat or chemicals can easily damage this kind of hair.
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hair growth

* Hair structure Part of the hair is hidden under the skin, while the rest is seen outside the body. The part of the hair hidden under the skin is the hair follicle. There are tiny blood vessels at the base of the follicle that nourishes the hair. The sebaceous glands secrete sebum which presents the hair shiny and waterproof to some extent. At the root of the hair follicle is the papilla, where hair grows. Hair follicles form while the baby is still in the womb. Hair can be wavy or straight.

After birth, there is no new growth of hair follicles. The section of the hair itself consists of three layers. The outermost layer called the cuticle is chopped. The middle layer called the cortex is thick. The cortex gives hair its strength, and color and determines whether the hair will be wavy or straight.

 * Hair growth Hair grows at the rate of 10 millimeters each month. Hair grows better It is also generally known that hair grows faster in summer than in winter. Hair grows best between the ages of 15 and 30 and slows down from the age of forty. Both sexes begin natural hair loss in their fifties.

Hair rejuvenation is done daily. Hair grows and falls. You normally lose 50 to one hundred hairs a day. Any loss greater than this or visible patches of baldness are cause for concern and may be classified as hair loss.