The most common cause of excessive hair loss is hereditary thinning or
baldness, with men and women inheriting the gene responsible for hair
loss from either or both parents.
According to a consumer servey conducted by the ISHRS in 2006,
82% of U.S. adults correctly identified heredity as a primary cause of
hair loss.
Thyroid hormone imbalance, nutritional deficiencies, side effects of
certain drugs, anemia and other systemic illness, and psychological
stress can cause hair loss at any age.
From head to toe, the human body has about 5 million hair follicles.
The human scalp - prior to any hair loss - has 100,000 to 150,000
hair follicles.
Most adults lose approximately 75-125 hairs ffrom their scalps every day.
Blondes have the greatest number of scalp hair follicles, followed by
brunettes, then red-haired people - who have the fewest number of scalp
hair follicles.
Healthy scalp hair grows at a rate of about one-fourth to one-half
inch per month.
Hair transplantation is a permanent form of hair replacement that
involves moving existing scalp hair from the back and/or sides of a
person's scalp to bald or thinning areas of that same person's scalp.
Transplanted hair is normal growing hair - it can be cut, colored,
curled and will grow forever. Most people who have experienced
permanent hair loss may be a candidate for hair restoration surgery.
The ISHRS estimates that approximately 168,000 hair restoration
procedures were performed worldwide in 2004.
As of September 2006, only two pharmaceutical agents are currently
approved by the U.S. Food and Drug Administration (FDA) for use as
hair restoration medications -topical minoxidil for men and women
(brand name Rogaine®) and oral finasteride for men only (brand name
Propecia®).
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