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Hair Growth Factor
Just like there are changes to the
body and skin, your hair's structure
and its appearance also change as
you grow older.
Hair Growth in Babies
Babies are born with a specific,
genetically determined number of
hair follicles. Yet some babies have
hardly any hair at birth, while others
have quite a bit. This is no indication
of what the state of their hair will be
later in life!
Hair Growth in Small Children's
Small children's hair often has
characteristics that are lost later in
life. For example, blonde hair may
darken as they grow older and curls
may disappear. The thickness of children's hair increases fast until the age
of three or four. The diameter continues to increase more slowly until
the age of 10 or 11, when the hair
should be at its thickest.
Hair Growth at Puberty
In puberty, the body undergoes a
number of metabolic changes. These
also affect the hair. The sebaceous
glands are stimulated, often secreting
an excess of oil and resulting in oily
hair. Dandruff can also appear at this
stage, the result of oil secretion and
hormonal changes.
Around the age of 25, the diameter of hair starts to decrease. In
the next 15 years the hair-growth
cycle changes, with fewer hairs in the
anagen phase and more in the resting
phase. Hair growth thus slows down.
Greying of Hair Phase
The age at which grey hairs start
appearing is genetically determined.
Hair turns white when melanin is no longer produced. Individual hairs
become thinner. Many men start
losing their hair, and a percentage of
women experiences some thinning.
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