Half-life estimate, not bloodwork or dosing advice. Disclaimer.
Very close to enanthate. Slightly longer half-life and a bit less parent hormone per milligram (~69%). The two esters overlay closely at the same schedule.
The default row models 200 mg as an intramuscular dose, twice a week (e3.5d), for 12 weeks.
Also called Testosterone cypionate, Test Cyp, Cypionate, Test Cypionate.
| Half-life | 5d |
|---|---|
| Time to peak | 2d |
| Parent hormone | 69% |
| Default dose | 200 mg |
| Default frequency | Twice a week (E3.5D) |
| Default duration | 12 weeks |
On that default row the model counts 24 doses. Steady state is about day 25. Washout runs to about day 27. In the last interval the peak is 359 mg and the trough is 292 mg, a swing of 19%.
About 69% of each milligram is parent hormone, so 100 mg of Testosterone cypionate leaves about 69.0 mg of Testosterone.
A half-life of 5d means a dose is still present at the next one, so the line climbs and then levels off.
Test E has a half-life of 4.5d against 5d on this page. Parent hormone is 72% there against 69% here.
Wiki first cycle — Test C 500 plots 250 mg twice a week (e3.5d) for 16 weeks. It is an illustration already in the app, not a protocol to follow.
Ester fraction ~0.69 from testosterone ester tables; half-life ~5 d from the steroidplot/Behre-era community PK set. How the model works.