Test-Comp 250 is used to treat for testosterone replacement therapy in male hypogonadal disorders. It is an oil-based injectable containing four different testosterone esters: testosterone propionate (30 mg); testosterone phenyl propionate (60 mg); testosterone isocaproate (60mg); and testosterone decanoate (100 mg). It is an intelligently “engineered” blend designed to provide a fast yet extended release of testosterone. Thus it can provide significant gains in strength and muscle tissue, as well as a noticeable increase in libido. The propionate and phenyl propionate esters in this product are quickly utilized, releasing into circulation within the first four days. The remaining esters are much slower to release, staying active in the body for approximately two and three weeks. It has a strong anabolic activity, with a pronounced androgenic component.