It was long thought that androgenic alopecia is related to an overproduction of testosterone.
We know now that this is false: this is not a production of testosterone than the average but rather a heightened awareness of hair follicles to male hormones.
This pathology is not a hormonal disorder but an abnormal function in the skin of the scalp causing hair loss.
Androgenic Alopecia is the most common form of alopecia, affects both men and women. It is the progressive decrease in the quality and quantity of hair, hormonal and hereditary origin.
ANDRO: hair loss comes from an abnormal reaction to hair androgens (male hormones that are present also in women).
GENETIC: This abnormal response is related to a genetic predisposition. Androgenic Alopecia is a too high sensitivity of hair follicles to male hormones due to heredity, both for women than for men. It is not a hormonal disorder but a local abnormal in the skin of the scalp that causes hair loss.
The problem of hair loss is more common in men than women.
In humans, over 95% of alopecia is androgenic origin. In France, they affect 1 person in 3 or 9 million people. Initially limited to temples, the gulfs and the top front of the skull, androgenic alopecia or hair loss, typically extends over the head. Only the crown never loses her hair. When hair loss begins at the end of puberty, the fall is very rapid and progresses to alopecia important before 30 years. There are also waterfalls begin late forties.
Androgenic alopecia in women
For women it's less frequent and less marked than for men, and never ends in total baldness. Women may experience androgenic alopecia and see a hair loss at any age but especially around or after menopause.
In women, hair loss begins with a broadening of the line at the top of the skull because the hair becomes thinner and less numerous. Thus, women are no bald patches, it is rather a strip from the top of his head hair and less dense.