Total testosterone measures the full amount of the hormone in your blood, while free testosterone represents the small, ...

We also know that within normal ranges, testosterone levels are not strongly predictive of aggression. In the amygdala, a ...

As the primary male hormone, or androgen, testosterone regulates various aspects of your growth and development as a man. Testosterone plays a central role in shaping both your physical ...

Testosterone is an important hormone that’s often called the male ‘sex hormone.’ Testosterone plays a role in muscle size and ...