Blend of 4 testosterones, by Organon.
Sustanon is four testosterones in one: 30 mg testosterone propionate, 60 mg testosterone phenylpropionate, 60 mg testosterone isocaproate, 100 mg testosterone decanoate. 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 it to put on mass and size while increasing strength.