Sustanon 250 Sustanon 250 stands out among other testosterone steroids due to its unique composition. Unlike other testosterone compounds that contain a single ester, Sustanon 250 combines four esters into one formula. While the testosterone hormone remains unchanged, the presence of these four esters provides a combination of fast-acting and long-lasting effects. This unique formulation allows users to experience the benefits of multiple esters with varying release timings and durations.