The effects of testosterone hormone include maintenance of male sexual function, development of secondary sex characteristics, muscle mass, etc. It promotes protein synthesis and bone development and increases basal metabolism. Testosterone hormone belongs to the steroid hormones, which are mainly secreted by the ovaries in women and testes in men. Studies have shown that testosterone hormone has many physiological effects on the human body. For men, testosterone hormone can play a role in maintaining sexual function and the development of secondary sex characteristics, so it can be used for testosterone replacement therapy for male hypogonadism in clinical practice. Secondly, testosterone hormone can also maintain muscle mass and strength, and to a certain extent, it can also promote protein synthesis, as well as the development of bone and play a role in maintaining bone density, at the same time, increase the body’s basal metabolism and maintain normal physiological functions. Under normal circumstances, the range of testosterone hormone is 14-25.4nmol/L in adult males and <8.8nmol/L in children, while the range of testosterone hormone is 1.3-2.8nmol/L in adult females and <0.7nmol/L in children. To summarize, testosterone hormone has a certain role in the human body, if testosterone hormone abnormality occurs, you need to go to the hospital for further examination, to clarify the specific causes and follow the doctor's instructions to deal with the treatment.