No human study has measured Tren A's half-life; the plot uses an estimate of about 1 day.
Half-life estimate, not bloodwork or dosing advice. Disclaimer.
By Austin Witherow and Mason Calvert · Last updated · Sources
| Measure | 50 mg once a day, after the last dose |
|---|---|
| Highest amount | 87 mg, 12 hours after the last dose |
| 50% of that left | 1.5 days after the last dose |
| 10% of that left | 4 days after the last dose |
| 3% of that left | 5.8 days after the last dose |
| Levels off | Around day 6 |
On the example input, 50 mg once a day, the curve levels off around day 6; after the last dose it takes 4 days to fall to 10% of its final 87 mg peak and 5.8 days to fall to 3%.
A single 50 mg injection fades on the same timeline from a lower peak of 43.5 mg of trenbolone, because every dose in the model decays at the same 1-day half-life.
This is the modeled amount of the drug itself. Drug tests look for metabolites and use different, often longer, windows. Pedplot does not estimate detection times.
| Frequency | Each dose | High point | Low point | Swing |
|---|---|---|---|---|
| Every 3 days (open in plotter) | 150 mg | 149 mg | 26.4 mg | 82% |
| Every other day (open in plotter) | 100 mg | 116 mg | 41 mg | 65% |
| Daily (open in plotter) | 50 mg | 87 mg | 61.5 mg | 29% |
Each schedule name opens that curve in the plotter.
The example input adds up to 350 mg a week. Given every 3 days as one 150 mg injection, the modeled amount swings 82% between its high and low point; split into 50 mg once a day, the swing is 29%.
The chart shows days 42 to 56 of an 8-week run, after all three schedules have levelled off.
No human study has measured Tren A's half-life. The plot uses a community estimate of about 1 day.
Trenbolone acetate was never approved for use in people, so there is no human label; the only US labels for it are cattle ear implants.
A PubMed search for human studies of trenbolone pharmacokinetics returned 11 results, and none measured blood levels after an injection of the acetate. They cover urine metabolites in doping control, residues in cattle and an unrelated horse study.
The two human trenbolone papers found both followed urine, not blood. In one, a single volunteer took a tracer dose of trenbolone by mouth and passed 54% of it in urine within 26 hours; in the other, urine metabolites were tracked for a week after oral, skin and buccal doses. Neither gives a half-life for the injected ester.
What the estimate rests on is the community figure for the acetate ester, not a measurement, and the same goes for the 12-hour time to peak. The ester weight, computed from PubChem, is the one firm number.
| Compound | Half-life | Time to peak | Parent share | Levels off | To 10% after last dose |
|---|---|---|---|---|---|
| Tren A | 1 day | 12 hours | 87% | Day 6 | 4 days |
| Tren E | 4.5 days | 2 days | 71% | Day 24.5 | 17 days |
| Test P | 19 hours | 1 day | 84% | Day 5 | 3.8 days |
| NPP | 1.5 days | 1 day | 67% | Day 8 | 6 days |
Each row uses that compound's own example input. Of these, Test P falls to 10% of its final peak soonest after the last dose (3.8 days), and Tren E takes longest (17 days).
The plot uses a community estimate of 1 day, marked as an estimate. Trenbolone acetate was never approved for people, and the human trenbolone papers found measured urine, not blood. At that rate the modeled amount falls to half its peak 1.5 days after the last injection, as the washout table shows.
There is no human label, only cattle ear implants, and a PubMed search returned no human study of blood levels after an acetate injection: the 11 results cover doping-control urine work, cattle residues and a horse study. The plot uses 1 day, and the notes on each source set out what was searched and what the estimate rests on.
With the same 350 mg a week, the modeled swing between the high and low point is 82% at 150 mg every 3 days, 65% at 100 mg every other day and 29% at 50 mg once a day, as the frequency comparison shows.
About 86.6 mg of every 100 mg is trenbolone: PubChem lists 270.4 for trenbolone and 312.4 for the ester. So the default 50 mg injection is drawn as 43.5 mg of trenbolone, as the ester arithmetic shows.
Data quality: Low. How the model works.