What is Sustanon injection used for? Sustanon is used to treat confirmed testosterone deficiency in males. The active substances of Sustanon are turned into testosterone by your body. Testosterone is the natural male hormone known as an androgen. In men, testosterone produced by the testicles.
What does testosterone do to a man? Testosterone is a sex hormone that plays important roles in the body. In men, it's thought to regulate sex drive (libido), bone mass, fat distribution, muscle mass and strength, and the production of red blood cells and sperm. A small amount of circulating testosterone is converted to estradiol, a form of estrogen