Testosterone Sustanon Testosterone Sustanon Sustanon 250 is an oil-based injectable Testosterone blend. sustanon 250 was developed by the international drug firm Organon. sustanon 250 typically contains four different Testosterone esters: Testosterone propionate (30 mg); Testosterone phenylpropionate (60 mg); Testosterone isocaproate (60mg); and Testosterone decanoate (100 mg), although a lower dosed version is also produced. An intelligently "e