According to scientists, there are three causes of alopecia in either men or women.
Too much DHT
Lack of vital nutrients
Free testosterone is broken down into DHT (a more potent form of testosterone). This chemical binds to the hair follicle receptors blocking vital nutrients from accessing the hair. The hair becomes miniaturized and thin and eventually dies. It is whats called the peach fuzz look on young men with hair loss.
This is why eunuchs never had any hair loss which got Plato wondering. It is also why only men get male pattern baldness and women dont. Hair loss in women is more evenly distributed with a thinning over the whole scalp. Also, effective DHT inhibiting treatment was only effective on young men with hair loss and not older men or women. Excessive DHT is therefore not the only reason for losing your hair.
It is normally unheard of for women in China to get hair loss at any age. Over the last 20 years increasing number of Chinese women in the industrialized areas of China are experiencing hair loss. This has been put down to chemicals form the...