In order to treat hair loss successfully, it is necessary to
know about hair. This article discusses general facts about
human hair, hair structure and growth.

The average human adult body has an astounding 5 million hairs
of which 100,000 to 150,000 are on the scalp. True blondes have
more hair on the scalp - 140,000 hairs than brunettes (105,000
hairs) or redheads (90,000 hairs). Hair is made up of a protein
called Keratin. Keratin is also a constituent of our nails.

* Hair around the world

Hair color and texture differ around the world. Asians have
jet-black hair whereas Scandinavians have varying shades of
browns and reds to the pale blonde. There are generally three
racial groups with three types of hair.

1.Oriental - People from Japan and China have straight and black
hair.

2.Caucasoid - This group is varied and a mixture of several
racial groups. The hair colors range from black to blonde. The
hair can be wavy or straight.

3.African - African people have black hair that is tightly
curled. It is woolly and dry. Heat or chemicals can easily
damage this type of hair.

* Hair structure

Some part of hair is hidden under the skin, while the rest is
seen outside the body. The part of hair hidden under the skin is
the hair follicle. There are tiny blood vessels at the base of
the follicle that provides nutrition to the hair.

Sebaceous glands secrete sebum that keeps the hair shiny and
waterproof to some extent. At the root of the hair follicle is
the papilla, which is where the hair grows. Hair follicles are
formed when the baby is still in the womb.

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

* Hair Growth

The hair grows at the rate of 12 millimeters every month. Hair
grows the best between 10 AM to 11 AM and again between 4 PM to
6 PM. It is also generally known that hair grows faster in
summer than winter. Hair grows the best between the ages of 15
to 30 and slows down from the age of 40 onwards. Both genders
start natural hair loss in 50s.

Hair rejuvenation takes place on a daily basis. Hair grows and
sheds. You normally shed 50 to 100 hairs per day. Any loss above
that or visible patches of baldness are a cause for worry and
can be classified as hair loss.
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About the author:
Rachel Stepsen suffered hair loss from her mid-20's. In an
effort to find treatment, Rachel learned all there is to know
about hair. She's written a series of articles to help others
learn about hair, and how they can most effectively reduce their
own hair loss with the right treatment.