The circulation and half-life of Sustanon 350 are complex due to its multi-ester composition:
●Testosterone Propionate: Shortest acting ester with a half-life of about 2-3 days.
●Testosterone Cypionate: Medium-acting ester with a half-life of approximately 8-12 days.
●Testosterone Enanthate: Long-acting ester with a half-life of about 10-14 days.
This combination results in a rapid initial release of testosterone (from the Propionate ester), followed by a sustained release over several weeks. Peak blood concentrations are typically reached within 24-48 hours post-injection, with levels then gradually declining.
The total active life of a single Sustanon 350 injection is approximately 3 weeks, though most users inject more frequently to maintain stable blood levels.
