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Hair Loss Information
FOR MEN, hair loss is male pattern
baldness. Yes, there are other types of hair loss,
including rare conditions such as alopecia totalis
and alopecia universalis, where the entire
scalp and entire body, respectively, become completely bald
due to a viral condition that is irreversible.
There is also patch baldness, in which hair
falls out in patches of the scalp. This is caused by stress
or poor nutrition or adverse scalp conditions.
But the hair will usually grow back once the cause has been
rectified.
FOR WOMEN, hair loss is different. There
is no set pattern for womens androgenic hair
loss, which like MPB, occurs in the overwhelming majority
of cases. Women can suffer from alopecia totalis
and alopecia universalis just like men. Women
can experience patch baldness for the same reasons as men
(stress, poor nutrition, etc.), as well as due to hormonal
changes from pregnancy and certain eating
disorders. However, like men, the hair will generally
grow back. The chief difference in womens androgenic
hair loss from mens (both are hormone related) is
that women tend to experience thinning that
occurs in no particular pattern or part of the scalp. Unlike
men, the scalp may not actually be totally denuded of hair,
just thin to the point where the scalp is visible. Like men,
however, the resulting hair loss is generally irreversible.
FOR BOTH MEN AND WOMEN, the cause of androgenic
hair loss is, as its name implies, hormone related.
It stems from a genetic predisposition for
a by-product of the male hormone testosterone (yes,
women have testosterone in their bodies, too), called DiHydroTestosterone
(DHT) to reside in the scalp. All hair follicles
grow through a growth-dormant-regrowth cycle. When DHT is
present in the scalp at high levels, the hair follicles tend
to increase their time of dormancy and decrease
the time for growth. In actuality, the follicle atrophies
due to the excess DHT. Each follicle produces hair for shorter
periods and “rests” for longer periods, until
it finally goes into permanent dormancy and
ceases to produce hair. An interesting phenomenon is that
in men, the DHT only seems to affect the hair follicles on
top of the scalp. While DHT is present in the entire
scalp, the hair follicles that reside on the sides and back
of the head resist its deleterious effects. When hair from
the sides and back of the head are transplanted to
the top of a bald scalp, the same DHT that caused the original
hair follicles to atrophy now has no effect
on the transplanted follicles.
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