Testosterone is one of the hormones needed for sexual development
and is present in both males and females. Testosterone is considered an
androgen, which is a male sex hormone, because it is made in much higher
amounts in men than in women.
Testosterone helps strengthen bones and muscles in both men and
women. In young men, testosterone signals the body to lower the voice, grow
facial hair, and develop sexual characteristics. This hormone is also needed
for sperm production.
E. Gregory Thompson, MD - Internal Medicine & Alan C. Dalkin, MD - Endocrinology
How this information was developed to help you make better health decisions.
The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.