How estimated levels work
Enhanced Training Studio can draw a chart of how much of each compound is likely still active in your body, based on your logged doses and the compound's half-life. It's a useful picture of peaks, troughs and missed doses, but it's an estimate from a simple model, not a blood level.
Note: estimated levels are for your own record keeping. They aren't a measurement and aren't medical advice.
The idea: half-life
A half-life is the time it takes for half of a substance to be cleared. After one half-life, half of a dose remains; after two, a quarter; after three, an eighth; and so on.
The app adds up what remains of every dose you've logged. For each dose:
amount remaining = dose × 0.5 ^ (time since the dose ÷ half-life)
So each injection adds a step up, and the total then falls away until the next one. Planned future doses are shown as a dashed line.
What it's good for
- Seeing the shape of your protocol: how big the swings are between doses, and how a change in frequency smooths them out.
- Spotting missed or late doses: they show up as a dip.
- Reading blood tests in context: with a licence, each test is marked on the chart where it was taken.
Its limits
- It's only as good as the half-life you enter. Published half-lives are averages and vary between people. Use the figure from your prescriber or the product information.
- It shows amount remaining, not a blood concentration. Absorption, body composition and individual metabolism all affect real blood levels, which only a blood test measures.
- It depends on your log. A dose that isn't logged isn't in the chart.
Use it to understand patterns, and use blood tests with your doctor for actual levels.
Doing it in Enhanced Training Studio
Add a half-life to a compound in Setup, and the chart appears on the Today screen. For common compounds the app suggests the published figure as you type the name, and Common half-lives under the half-life field lists them all. This is part of the free edition. With a licence, your blood tests are marked on the same chart.
Calibrated to your blood tests (licence)
For testosterone (cypionate, enanthate, propionate or undecanoate), your Total testosterone results calibrate the chart. Each result is compared with the model's estimate at the time the blood was taken, and the chart gains a second axis with an estimated level in nmol/L (or ng/dL, if that's what your lab reports). The note under the chart gives your estimated level now and the lows and highs to expect on your current schedule.
- A test only counts once you've logged at least 2 half-lives of doses before it, so the estimate has had time to build up.
- Enter the time of the blood test if you can. Without one, it's taken as 7 am, before that day's dose.
- Tests just before a dose (a trough) work best. A test within a day of an injection is near a peak, which the simple model gets wrong, so it's only used when there's nothing else.
- With several tests, the app uses the last 4 and says if they disagree a lot (a different lab, test time or product strength can do that).
It's still an estimate from the model, not a blood result, and it doesn't suggest dose changes.