Half-lives / Testosterone Cypionate
Testosterone Cypionate half-life
≈ 8 days (192 hours ≈ 8 days) — computed decay curve below, primary source cited.
| Half-life | ≈ 8 days |
|---|---|
| ~97% cleared (5 half-lives) | ≈ 40 days |
| Typical route (published research) | IM / SubQ · weekly |
Source: Testosterone cypionate PK literature (cited range 4–10 days; see monograph)
Frequently asked
How long does Testosterone Cypionate stay in your system?
With a half-life of ≈ 8 days, roughly 97% of a single Testosterone Cypionate dose is cleared after five half-lives — about 40 days. Repeated dosing accumulates and takes correspondingly longer to clear.
What does a ≈ 8 days half-life mean in practice?
Every 8 days, the remaining amount halves: 100% → 50% → 25% → 12.5%, and so on. The curve above plots exactly this decay for a single dose.
Where does this Testosterone Cypionate half-life number come from?
Testosterone cypionate PK literature (cited range 4–10 days; see monograph). We cite a primary source for every half-life we publish and version every change.
Related: Testosterone Cypionate reconstitution calculator · Testosterone Cypionate dose charts
Guides mentioning Testosterone Cypionate
See your own estimated levels
The Zyra Labs app plots this curve from the doses you actually log — accumulation, overlaps, and all — on your device, free to start.
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