Your protocol, tracked to the microgram.
Zyra Labs logs every dose, plots your medication levels from published half-lives, and tracks inventory and labs — local-first and free to start. The calculators are just the front door.
Answers to the questions asked every day
The same tested engine that powers the app — run in your browser, so your numbers never leave the page.
Nine compounds, three tools each
Calculator, cited half-life, and dose charts for the compounds people actually track — growing as new ones emerge.
Why these numbers are trustworthy
We sell software, never compounds.
No vendor ties, no affiliate links, no where-to-buy — anywhere. Our tools refuse sourcing questions the same way the app does.
Every value has a receipt.
Each half-life traces to a primary source; every formula is documented on the methodology page; corrections are published, never silent.
Math, not advice.
The tools do arithmetic on numbers you enter. They never recommend a dose — by design, at every layer — and nothing here is medical advice.
92+ cited guides, comparisons, and explainers
Reconstitution how-tos, half-life and timing, compound comparisons, and protocol tracking — research-framed, sourced, and free.
How to reconstitute a peptide, step by step
Reconstitution explained: what bacteriostatic water does, how concentration works, and the exact math to turn a lyophilized vial into a measured draw. Research/education only.
ComparisonsBPC-157 vs TB-500 compared
BPC-157 and TB-500 side by side with the literature: two unrelated peptides, two different repair mechanisms, and two different evidence bases — explained in plain English.
Half-life & pharmacologyHow long does semaglutide stay in your system?
How long semaglutide persists: with a ~7-day half-life, roughly five weeks to clear a single dose. The math, the accumulation caveat, and the cited sources.
ComparisonsCJC-1295 DAC vs no-DAC
CJC-1295 with DAC versus without (mod GRF 1-29): how one small chemical anchor stretches the half-life from minutes to days, backed by the 2006 human pharmacokinetic trial.
Track the whole protocol — not just one draw.
Zyra Labs logs doses in a few taps, schedules reminders, estimates medication-level curves from published half-lives, and tracks inventory and labs. Local-first, free to start, your data stays on your device.