Urinary testosterone

Testosterone is the main androgen in the human body. 95% of adult male plasma testosterone comes from testicular mesenchymal cells, and a small part comes from adrenal cortex and extraglandular transformation. Women mainly come from the adrenal cortex, and the ovaries secrete a small amount. Most of testosterone in plasma binds to beta globulin of testosterone binding protein, and only a small amount is in a free state to exert physiological effects. Testosterone can promote the synthesis of protein and bone matrix and increase the production of erythropoietin. Testosterone is the main indicator of androgens.