Hair Loss in Men

Male Pattern Baldness, the most common cause of hair loss, is hereditary. Hair follicles from the frontal part of the scalp to the crown, or vertex, are susceptible to loss when acted upon by the male hormone testosterone.

Hair loss frequently begins in the late teens or early twenties, when testosterone levels are at their height. Certain hair follicles gradually become finer, grow more slowly and eventually go into a terminal resting phase, leaving either fine (baby) hair or total hair loss in the affected areas.

If you have hair loss of this type, what you may not realize is that the hair on the back and sides of your head is genetically programmed to grow for your lifetime.

The human head has approximately 100,000 hairs and normally loses in the range of 20-100 hairs a day. There are three phases of hair rejuvenation. These are:

1. Anagenic (Growth) Phase, during which hair is produced.

2. Catagenic (Shedding) Phase, in which the hair falls out.

3. Telegenic (Resting) Phase, when the hair reaches a dormant state.

The growth phase lasts approximately 2.5 years while the resting phase lasts about three months. Between 10-15 percent of all hairs are in a state of rest at any given time.

Individuals with above average hair loss experience a shorter growth phase and a longer resting phase than the norm. When the telegenic phase lasts too long, the papilla shrinks and is incapable of producing a normal hair. The hair becomes thinner and grows more slowly on certain areas of the head, usually at the temples and on the top.

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