Half-Life Lab is the community for people who'd rather understand the science of performance enhancing compounds than guess. Compound pharmacology across anabolics, SARMs, SERMs, peptides, GLP-1s and TRT, plus an interactive tool that shows exactly how each one clears the body over time.
A real reference plus the tool, not a coach and a PDF.
Model any compound or stack across three textbook PK models: simple decay, absorption+elimination, and ester-aware kinetics. See peak:trough, steady state and how compounds overlap. Unlocked with your member passcode.
Anabolic hormones (incl. testosterone and every ester), SARMs, peptides & GH, GLP-1 / incretins, PCT and supplements, each with its published half-life and reference pharmacology.
Every compound has a written profile: what it is, how it works, the evidence, the real risks, and the half-life takeaway, wired to the tool so you can model it yourself.
A structured course built from the literature, granular by class, with quizzes so you actually retain it. Unbiased, education-first.
Visualize how long-acting compounds like retatrutide, semaglutide and tirzepatide accumulate and clear from their published half-lives.
A community that cares about understanding, not just doing. Bring sources and questions. No broscience, no sourcing.
A clear line so there's no confusion about what you're joining.
The one number that explains how a compound behaves over time, and how to keep it stable.
What it is. Half-life is the time it takes for the amount of a compound in your blood to fall by half. If something has a 24-hour half-life, half is left after a day, a quarter after two, an eighth after three. It is the most useful single number for understanding how a compound behaves over time.
Accumulation and steady state. If a dose repeats before the last one clears, levels stack, climbing until intake equals clearance ("steady state," reached after about 4-5 half-lives). A long half-life builds slowly to a smooth, steady level; a short one is fast-on, fast-off, with bigger peaks and troughs.
Stability and side-effects. Many side-effects track the extremes, not the average, the peak right after a dose and the crash at the trough. Holding a compound in a steady band, rather than letting it spike and dip, is generally how people try to keep side-effects down.
Published half-lives are estimates that vary by person, formulation and route, so the curves here are illustrations, not precise predictions.
One membership, everything inside. The tool, the full guide, the modules, the community.
Join Half-Life Lab on Skool at the founding rate.
Grab your personal access code from inside the community.
Open the tool and enter your code. That's it.
Explore every compound. Your code is just for you.