Hamilton found that castration before baldness prevented hair loss altogether. While the process of castration after baldness stopped hair growth.
Recent research has shown that the key to hormone baldness is testosterone. It is known that this hormone (testosterone) excreted in the males of the testes. The hormone circulates in the blood and is associated with hair follicles.
Testosterone is an effective factor in the development and growth of male reproductive organs, and is also associated with hair growth, beard, muscle mass, race and bone size.