I didn't say that. I've actually said it is related to hormones as well, and in particular to your T:E2 ratio. Walking around with an E2 >40 and or a total T of 1500 is something that hasn't been observed in healthy men ever, whatever the so called anti-age gurus and followers will tell you.
That's the reason why vast majority of body builders lose their hairs.
Prolactin is another indicator. High prolactin has been observed in vast majority of hair loss sufferers, so chronic stress and sleep deprivation have been associated with it. But that is a direct association not fully proved yet.
I also disagree with Systemlord. It's not only about vanity.
There is a tight link between bald men and cardiovascular diseases and inflammation, according to the studies we have available.
Once again, hair loss is one of the first signal your body is giving you that something is wrong.
And I'm not talking about normal aging.
That can't be reversed.