Sustanon 250 Blend of 4 Testosterones Sustanon 250 is an oil-based injectable containing four different testosterone compounds: testosterone propionate, 30 mg; testosterone phenylpropionate, 60 mg; testosterone isocaproate, 60mg; and testosterone decanoate, 100 mg. The mixture of the testosterones are time-released to provide an immediate effect while still remaining active in the body for up to a month. As with other testosterones, Sustanon is an androgenic steroid with a pronounced anabolic effect. Therefore, athletes commonly use Sustanon to put on mass and size while increasing strength. However, unlike other testosterone compounds such as cypionate and enanthate, the use of Sustanon leads to less water retention and estrogenic side effects. This characteristic is extremely beneficial to bodybuilders who suffer from gynecomastia yet still seek the powerful anabolic effect of an injectable testosterone. Although Sustanon remains active for up to a month, injections should be taken at least once a week to keep testosterone levels stable. A steroid novice can expect to gain about 20 pounds within a couple of months by using only 500 mg of Sustanon a week. More advanced athletes will obviously need higher dosages to obtain the desired effect. Sustanon is a fairly safe steroid but it is probably wise to use an antiestrogen such as Nolvadex (tamoxifen citrate) or Proviron (mesterolone). Athletes interested in rapid size and strength gains find that Sustanon stacks extremely well with orals such as Anadrol (oxymetholone) and Dianabol (methandrostenlone). On the other hand, Sustanon also stacks well with Parabolan (trenbolone hexahydrobencylcarbonate), Masteron (drostanolone propionate), and Winstrol (stanozolol) for athletes seeking the hard, ripped look.