Compound library / Hormone Replacement
Long-acting injectable testosterone ester used for hypogonadism/TRT and, off-label, performance purposes. Not a peptide — a steroid hormone — but tracked here alongside peptide protocols since it's commonly cycled together.
| Category | Hormone Replacement |
|---|---|
| Regulatory standing | Approved medicine |
| Typical route | Intramuscular |
| Half-life | ~8 days |
| Common dose range | 50-200 mg/week (TRT range), titrated to labs |
| Typical cycle length | Ongoing under medical supervision (TRT) or defined cycles |
BioHack Track models Testosterone Cypionate at a half-life of 192 hours, so every dose you log is decayed against that curve and the app shows estimated active levels — not just what you typed.
An FDA-approved product containing this compound exists, and its label is linked under Primary sources below. That label is the authority on dosing; the range on this page describes what people commonly track, including off-label use, and does not replace it.
Supplied pre-mixed in oil; no reconstitution needed, but warm/roll vial before drawing.
Store at room temperature, away from light.
Prescription medication in the US for diagnosed hypogonadism. Requires regular bloodwork (testosterone, hematocrit, lipids, PSA); off-label/non-prescribed use carries cardiovascular and HPTA-suppression risks.
Track Testosterone Cypionate in BioHack Track. Half-life, dose range and route come pre-filled from this library — log a dose and the app counts your vial down, models what is in your system, and puts it on the same chart as your labs and body composition.
These open a search of each database for Testosterone Cypionate — they are not citations, and nothing here is evidence for any particular dose. The same links are in the app.
Primary sources for Testosterone Cypionate
The half-life, route and dose range on this page are compiled from published pharmacokinetic literature, manufacturer and product monographs where one exists, and the ranges commonly reported in clinical and research use. They are kept as a range rather than a single figure because that is what the sources actually support — a half-life varies with route, formulation and the person.
These are not citations, and this page is not a review of the evidence. Where a number matters to you, follow the database links above and read the source. We say so plainly rather than dressing a compiled reference up as one.
Nothing on this page has been reviewed by a named clinician. It is a reference for people already tracking a protocol, not a recommendation to start one.
General reference compiled for use inside the app, not medical advice and not a recommendation to take anything. Dose ranges are what is commonly discussed, not a prescription. Talk to a qualified healthcare professional.