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| Hair
forms in a pouchlike structure below the skin called
a hair follicle. What we see as hair is actually
the hair staff, which is the keratinized, hardened
tissue that grows from this follicle. |
| Humans
have more hair follicles per square inch of skin
than most higher primates, including chimpanzees
and gorillas. Because most of this hair is fine
and pale (called vellus hair), it usually isn’t
visible to the naked eye. Consider this: the forehead
has more hair follicles than any other part of
the body. The thicker, fully pigmented hair most
people consider “real hair” is called
terminal hair. This hair is found on the scalp,
eyebrows, legs, back, underarms, and genital
areas. This is the hair the LightSheer™ diode
laser treats. |
| Everyone’s
hair grows differently, depending on age, weight,
metabolism, hormones, ethnicity, medications, and
others factors. But all hair goes through three
distinct growth phases: |
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Hair's
active growth phase is called anagen.
During anagen, the hair contains
an abundance of melanin.
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Catagen
is the regresion phase when the
lower part of the hair stops growing,
but is not shed, and the follicle
is reabsorbed.
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The
resting phase is called telogen,
during which the old hair falls
out in preparation for the development
of new hair
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1)
Active growth phase (called the anagen
phase), which lasts up to several years.
At any given time, the majority (85%) of
our body hair is in this phase. During
anagen, the hair has an abundance of melanin.
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2)
Regressive phase (catagen phase), which
lasts about two weeks, during which the
hair stops growing but is not yet shed.
About 3 – 4% of our body hair is
in this phase at any given time.
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3)
Resting phase (telogen phase), which lasts
5-6 weeks, at the end of which the hair
falls out and a new hair begins to from.
Approximately 10-13% of our body hair is
in this phase at any one time. The LightSheer™ diode
laser most effectively disables hair that
is in the active growth (anagen) phase.
Because all the hair in a treated area
may not be in the anagen phase, more than
one laser treatment may be necessary to
remove the hair that subsequently enters
the growth phase.
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