It also interacts with nuclear receptors in DNA, which causes protein synthesis. The body has a system for controlling testosterone, sending messages through hormones and chemicals that are released into the bloodstream. In the brain, the hypothalamus tells the pituitary gland how much testosterone is needed, and the pituitary relays that information to the testicles.
Before a boy is even born, testosterone is working to form male genitals.
During puberty, testosterone is responsible for the development of male attributes like a deeper voice, beard, and body hair. Testosterone production surges during adolescence and peaks in the late teens or early 20s.
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