Testosterone Sustanon powder refers to the raw, non-sterile bulk form of Sustanon, a mixture of testosterone esters. ✅ What Sustanon Is Sustanon typically contains a blend of four testosterone esters: Testosterone propionate Testosterone phenylpropionate Testosterone isocaproate Testosterone decanoate These provide both fast and sustained release of testosterone after injection. 1. Male hypogonadism When the body cannot produce enough testosterone due to: Primary testicular failure Pituitary or hypothalamic disorders Used to restore normal testosterone levels and relieve symptoms like: Low libido Fatigue Loss of muscle mass Reduced bone density Mood disturbances 2. Delayed puberty in males Occasionally used in adolescents under specialist supervision. 3. Gender-affirming hormone therapy (GAHT) Used as one option for masculinizing hormone therapy in trans men