Free tool · harm reduction

Blood-level plotter

Pick a compound, enter the dose and frequency you’re using, and see the serum curve — buildup, steady state, and how hard it swings between injections.

Half-life: 108h (4.5d)
Relative serum level · Testosterone Enanthate
0w2w4w6w8w10w12w
Steady peak
239.96mg-eq
Steady trough
143.01mg-eq
Peak : trough
1.68×
To steady state
19.4days

Relative units (mg-equivalent) — shows the shape, buildup and peak-to-trough swing of a dose you entered, not an absolute blood concentration. One-compartment model. Educational only.

Why the curve matters

Two people on the same weekly amount can have very different blood levels depending on the ester and how often they inject. A shorter ester clears faster, so infrequent injections produce big peaks and deep troughs; splitting the same amount more often flattens the curve. Seeing the shape is the point — it explains day-to-day swings and helps you time bloodwork (a trough draw vs a peak draw tells very different stories).

FAQ

What does the blood-level plotter show?

It plots how the serum level of a compound rises and falls over a cycle for the dose and injection frequency you enter, based on the compound's half-life. It shows the shape — buildup, steady state, and peak-to-trough swing — in relative units, not an absolute blood concentration.

Does a shorter ester really swing more?

Yes. Shorter half-life means faster clearance, so the same weekly amount split the same way produces bigger peaks and lower troughs. The plotter makes that visible — which is why frequency matters.

Does this tell me what to take?

No. It's a descriptive, educational tool — you supply the dose and frequency, it shows the resulting curve. It never recommends a compound, dose, or protocol. Decisions belong with a qualified physician.

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Educational / harm-reduction tool. Not medical advice. Does not recommend any compound, dose, or protocol. Half-lives are published estimates; individual response varies.