Hair
is actually dead material when it leaves its root - otherwise
it would hurt very much when your hairdresser works with
his scissors. Most people know that, but do you know about
these facts:
A
blonde head of hair has usually much more strands than red
or dark hair heads.
Hair
consists mainly of keratin, which is also responsible for
the elasticity of fingernails.
A
single hair has a thickness of 0.02 - 0.04mm, so that 20
- 50 hair strands next to each other make one millimetre.
Hair
is strong as a wire of iron. It rips after applying a force
equivalent to 60kg, only after it stretched itself for about
70%.
Even
on a good hair day, everyone loses at least 40 to 100 strands.
The
average scalp has 100,000 strands, or just fewer than 1000
per square inch.
We
are born with all our hair follicles. Some are programmed
to grow pigmented hair (as on our scalp) up to 3 feet in
length.
In
America in '96, 38 million men and 19 million women experience
common hair loss determined by heredity.
The
trait for baldness can be passed down through paternal or
maternal genes.
Hormone
imbalance and crash dieting can trigger temporary hair loss.
