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Hair loss in men
Why is my hair thinning?
Although lifestyle and environmental factors do contribute to or accelerate hair loss – such as stress, smoking, poor nutrition and exposure to UV or chemicals – the most common reason for hair loss in men is Androgenetic Alopecia or Male Pattern Baldness (MPB). It will affect 70% of men at some point in their lives.
90% of hair loss in men occurs when susceptible hair follicles are exposed to the androgen (male hormone) Dihydrotestosterone, or DHT, a metabolite of testosterone. It causes the hair to become finer and shorter with each growth cycle resulting in a thinning effect which eventually becomes permanent hair loss.
When ‘thinning hair’ becomes male pattern baldness
In most men, the hair at the front, crown and top of the scalp – where follicles with androgen receptors are located – are the areas that typically suffer hair loss.
While hair growth at the sides and rear of the scalp is usually unaffected – resulting in the classic horseshoe-shaped ring of hair associated with Male Pattern Baldness. The Norwood-Hamilton scale illustrates the most common patterns.
The severity varies considerably – in some cases, men may simply see a minor receding hairline, whereas others suffer complete hair loss from the front all the way to the crown. And it can strike from the onset of puberty when blood androgens naturally increase.
The Norwood scale
Male hair loss is assessed using the Norwood Scale. The diagrams below give you an approximate scale to assess your hair loss.