You may associate testosterone with the development of male characteristics and sexual function in men, but it actually serves many different purposes throughout the body. In this blog, we will look into the various roles testosterone plays in the body.

Endocrine System

The endocrine system is responsible for making hormones. The brain tells the pituitary gland, part of the endocrine system, how much testosterone is required, which then tells the testicles how much to produce. Testosterone is produced mostly by the testicles, with a small amount produced by the adrenal glands. Testosterone forms the testicles of a male fetus before it is born. In puberty, testosterone is responsible for developing male characteristics, such as facial hair and a deeper voice.

Reproductive System

As stated above, testosterone forms the testicles, as well as the rest of the male genitals. Testosterone levels become exponentially higher during puberty, which further promotes the growth of the reproductive system. Throughout men’s lives, testosterone aids in the daily production of sperm.


With the development of the reproductive system comes sexual desire. Testosterone is associated with a higher sex drive. Men with low testosterone often suffer from low libido, which can result in erectile dysfunction. If your desire for sex has decreased and you suspect you may have low testosterone, contact Men’s Vitality Center in Glendale for testosterone replacement therapy.

Central Nervous System

The central nervous system sends messages through the body using hormones and chemicals, including the messages necessary for testosterone production and use. The hypothalamus, the part of the brain that sends messages to the pituitary gland, controls testosterone release. Testosterone is also relevant to the central nervous system because it plays a part in a variety of behaviors, including competitiveness, aggression, and dominance. Additionally, a man with low testosterone often experiences cognitive and symptoms such as difficulty concentrating, low mood, sleep issues, and low self-esteem.

Skin and Hair

In puberty, testosterone facilitates the growth of hair on the face and body. It is common for men with low testosterone to lose body hair.

Muscle, Fat, and Bone

Testosterone plays a role in muscle growth. It also increases the neurotransmitters that are responsible for tissue growth, which is why it is easier for men to gain muscle from strength training. Testosterone is also helpful for your metabolism, helping your body to burn fat. It is common for men with low testosterone to lose muscle and it gain fat. Additionally, testosterone is helpful for bone density, and helps manufacture red blood cells in bone marrow.

Circulatory System

The bloodstream is how testosterone moves throughout the body. When we test your testosterone levels, we must take a blood test. As we already stated, testosterone helps make red blood cells in bone marrow. Additionally, testosterone may be beneficial for your heart. There are some studies that suggest that testosterone may affect your blood pressure, however, so if this is a concern, bring it up with your physician.

Testosterone is essential for your body for a number of reasons, which is why if you are experience low T, you need to talk to your doctor about your options. At Men’s Vitality Center in Glendale, we offer testosterone replacement therapy to treat men with low T. If you are interested in testosterone replacement therapy, contact us today!