Men can start to lose their hair as early as age 17. The most common type in men is 'Male Pattern Baldness' (MPB). The main causes as described by the medical profession are heredity, natural ageing, hormonal disruptions and imbalances, stress and damage by toxins.
One of the most plausible explanations is that MPB is caused directly by hormonal imbalances called Androgens, mainly by the hormone testosterone. Testosterone causes the hair roots to gradually close up, prevent the hair from growing through properly. Eventually, the hair follicle closes up completely disabling any further growth.
This pattern begins as a receding hairline, which creates a noticeable pattern, eventually leaving a small hair 'island' in the centre of the scalp.
Other explanations include poor blood flow in the scalp and excessive oil production. It is clear that some expiations and theories are simple, but not necessarily true. The hormonal theory sounds the most realistic in my opinion; men who suffer hair loss have been found to have high levels of testosterone in their system.
In my honest opinion, I believe that until someone somewhere comes up with a provable explanation, there is no way hair loss can be prevented. The majority of products available on the market tend to delay hair loss for a while, but as soon as you have stopped applying a product, the hair loss rate accelerates to its normal pace, or increases even faster!
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