Testosterone. Testosterone is, in many ways, THE male-defining hormone. It is an anabolic steroid, primarily produced in a man’s testes, and it is key in the development of male reproductive organs and secondary sexual characteristics, such as bone and muscle growth and all that body hair.
Testosterone is an important male hormone. A male begins to produce testosterone as early as seven weeks after conception. Testosterone levels rise during puberty, peak during the late teen years, and then level off. After age 30 or so, it’s normal for a man’s testosterone levels to decrease slightly every year. Testosterone levels affect everything in men from the reproductive system and sexuality to muscle mass and bone density. It also plays a role in certain behaviors.
In men it Effects:
- Endocrine Sysystem
- Reproductive System
- Central Nervous System (CNS)
- Skin and Hair
- Muscles, Fat distribution and Bone Health
- Circulatory System
When it comes to testosterone therapy and the heart, recent studies have conflicting results and are ongoing. Testosterone therapy delivered by intramuscular injection may cause blood cell counts to rise. Other side effects of testosterone replacement therapy include fluid retention, increased red cell count, and cholesterol changes.