Testosterone Esters 2.5gm/10ml is the most important and popular anabolic steroid, and Sustanon 250 is the best-known form of injectable testosterone. It has become so popular for anabolic steroid cycles that the name now extends past the Schering brand and is often given to any steroid preparation made to the same formulation. Sustanon 250 Contains Four Testosterone Esters Sustanon 250 contains, per mL, short-acting testosterone propionate, 60 mg of testosterone phenylpropionate, 60 mg of testosterone isocaproate, and 100 mg of testosterone decanoate. The first, testosterone propionate, is short-acting and gives Sustanon a quick onset of action in a steroid cycle. The other esters are medium to long-acting. Sustanon 250 Side Effects Side effects of Sustanon are, for the same amount of testosterone, identical to other testosterone esters such as testosterone enanthate. The principal reasons to choose between Sustanon and testosterone enanthate are price and availability. Quality of results in the steroid cycle will not be affected by the decision. Sustanon 250 Dosages 250mg per Week At a usage level of 250 mg/week, Sustanon provides basically only a high level of testosterone replacement therapy. Individuals with low testosterone may see a marked improvement, but many with mid-normal or high natural testosterone will see little added effect at this dosage level. Yet, Sustanon is suppressive of the hypothalamus and pituitary at this dosage and will largely shut down natural testosterone production while being used. So, this dosage has relatively little of the benefits of most steroid cycles, but shares the adverse side effect of suppressed testosterone production. 500mg per Week 500 mg/week is a minimal dosage level for most to see good results. At this dosage, gains are typically good for a first cycle and often no ancillary drug is required to control estrogen.