Androgenetic alopecia or male pattern baldness is the most common form of hair loss, accounting for 95% of male hair loss cases.
While there are many possible reasons why someone may show hair loss, such as chronic diseases, skin diseases, reactions to certain medicines, seasonality, stress, malnutrition, environmental pollution and other aspects of modern life, the greatest percentage of male hair loss is due to heredity.
The estimated rate of inheritance of male hair loss is 81%. This means that genetic factors contribute more to the risk of male baldness than environmental ones. Hereditary predisposition is the most powerful factor for hair loss in men as the genes largely determine whether a man will show male pattern hair loss, the latter’s age of onset, pattern and degree of progress.
Male Hair Loss
The most common pattern of androgenetic alopecia is the frontal and temporal thinning, with a tendency to extend to the crown of the head. Over the years, the thin area on the crown of the head expands and in many cases ultimately unites with the front area. Hair loss with apparent thinning occurs in 25% of the male population by the age of 30 and in 50% by the age of 45-50.
Male hair loss mostly starts at the end of puberty and progresses rapidly in the ages between 20-30, while the shedding slows down after the age of 30-35. At older ages, hair loss is slowed down even further, following a path that coincides with the stabilization and gradual decline in levels of male hormones in the blood.