THE NORMAL HAIR GROWTH CYCLE LASTS FROM 3 TO 7 YEARS.
In an alopecic cycle, the growth period lasts from 10 to
15 months.
CAUSES OF ALOPECIA:
Environmental factors, a 5% of the factors are physical,
chemical, mechanical and hormonal (hypothyroidism),
deficient and unbalanced feeding, emotional disorders.
Androgenetic Alopecia:
It represents a 95% of the causes of alopecia and it
mainly affects men over women. The alopecic areas in men
(‘male pattern baldness’) present a typical distribution:
the vertex area (crown), receding hairlines and -in
severe cases- they stretch to the back of the head
covering also the temporal and occipital areas. The DNA
in the follicular cells of these areas does not have the
genetic information it needs to synthesize the 5-a
reductase, which is the enzyme that transforms the
testosterone into DHT (dihydrotestosterone). The DHT
alters the normal hair cycle, which shortens
considerably to 15 months (normal length: from 3 to 7
years) causing the new hair to grow thinner and thinner
as a result of the progressive degeneration of the
follicle. Eventually, it suffers a complete atrophy and
as a consequence, hair disappears altogether.
