Half-life varies with formulation, route and person. A single figure copied across vendor sites is rarely sourced.
What half-life measures
Half-life is the time for blood concentration to fall by half. It depends on formulation (for example ester chains), route of administration and individual metabolism.
Many retail figures trace back to forum posts rather than pharmacokinetic studies.
Why it is not a safety guide
Biological effects, such as hormonal suppression, can outlast measurable drug levels. Long-acting metabolites can persist for months.
Reading critically
Ask whether a figure cites a human study, what dose was studied and in whom. Absent a source, treat it as unverified.
In short
- Half-life is context-dependent.
- Effects can outlast blood levels.
- Unsourced figures are unverified.
Cited studies
These studies provide context for the article; findings may not apply to non-medical use or products sold online.
Kicman AT. (2008). Pharmacology of anabolic steroids. British Journal of Pharmacology.
Read the study ↗Sobolevsky T, Rodchenkov G. (2012). Detection and mass spectrometric characterization of novel long-term dehydrochloromethyltestosterone metabolites in human urine. Journal of Steroid Biochemistry and Molecular Biology.
Read the study ↗
Unfamiliar terminology is defined in our glossary. How we research and grade evidence is set out in our editorial standards, and errors can be reported through corrections.
This article is educational. It is not medical advice, a dosing recommendation, or an endorsement of use. Speak with a qualified medical practitioner about your circumstances.