What Is Turinabol? Half-Life, Dosing & How to Track It
Also known as: Chlorodehydromethyltestosterone · Tbol · Oral Turinabol
Turinabol (chlorodehydromethyltestosterone, Tbol) is a 17-alpha-alkylated oral steroid developed in East Germany in the 1960s, with a half-life of roughly 16 hours. It is chemically Dianabol with a chlorine atom added — a change that blocks aromatization to estrogen and gives it a reputation as comparatively "mild" — but that reputation applies to androgenic and estrogenic side effects, not to its liver risk, which is real and requires the same monitoring as any 17-alpha-alkylated oral. Educational only; not a recommendation to use.
What Turinabol is and how it works
Turinabol was developed by East German pharmaceutical company Jenapharm in the 1960s and became infamous decades later for its central role in the East German state-sponsored doping program of the 1970s–80s ("State Plan 14.25"), documented after German reunification through recovered state records — a well-established piece of doping history rather than a marketing claim.
Chemically, it is methandrostenolone (Dianabol) with a chlorine atom added at the 4-position, and that single change is significant: it blocks the molecule from being aromatized into estrogen, which is why Turinabol doesn’t carry Dianabol’s water-retention or gynecomastia risk. Its anabolic-to-androgenic ratio is also generally regarded as favorable, contributing to its "mild" reputation.
That reputation is real for androgenic and estrogenic side effects specifically — it is not a statement about liver safety. Turinabol is 17-alpha-alkylated, the same structural feature responsible for hepatotoxicity across most of this drug class, and that risk is independent of whether a compound aromatizes.
Oral dosing & half-life
A roughly 16-hour half-life is long enough to support a single daily dose for some protocols, though splitting into two remains common to keep levels steadier across the day.
Tablets are commonly manufactured in a narrow range of strengths.
| Tablet strength | Common source | Typical split |
|---|---|---|
| 5 mg | Common manufactured strength | Once daily or AM / PM |
| 10 mg | Common manufactured strength | Once daily or AM / PM |
Tablet strengths shown reflect what is commonly manufactured, not a recommended total — dosing decisions belong with a prescriber, and the liver monitoring below matters more than the number on the tablet.
What makes orals different from injectables
Turinabol takes the same first-pass route through the liver as any swallowed steroid, and the 17-alpha-alkyl group is what lets it survive that pass largely intact — the identical trade-off every 17-alpha-alkylated oral in this library makes, whether or not the compound aromatizes.
The non-aromatizing property that gives Turinabol its "cleaner" reputation is a completely separate mechanism from the one that determines liver strain — conflating the two is the most common misunderstanding about this compound specifically.
What to monitor & the real risks
Liver enzymes (ALT/AST) are the standard first check, with a baseline before starting and a follow-up during a course — the same protocol as any 17-alpha-alkylated oral, regardless of Turinabol’s reputation as comparatively mild.
A lipid panel still matters: 17-alpha-alkylated orals suppress HDL and can raise LDL through a liver-metabolism pathway that has nothing to do with aromatization, so Turinabol’s non-aromatizing status does not protect lipids the way it protects against gynecomastia. Blood pressure is worth a periodic check as well, since it can shift independent of water retention.
How to track Turinabol in Stackeddd
Log each dose and keep liver enzymes, lipids, and blood pressure trending — Turinabol’s reputation as "milder" is about androgenic and estrogenic side effects, not the liver, and tracking is what keeps that distinction from becoming an assumption.
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Blood-Level Simulator
Log your Turinabol dose and schedule, and keep liver enzymes, lipids, and blood pressure trending in one place so a change from baseline is obvious rather than assumed away by reputation.
Related compounds
Related reading: TRT Math: what mg/mL actually means · Injection frequency: daily vs EOD vs weekly
Frequently asked questions
Is Turinabol liver toxic?
Yes — it is 17-alpha-alkylated, the same structural feature responsible for hepatotoxicity across most oral steroids. Its reputation as "mild" refers to androgenic and estrogenic side effects, not liver risk, which still requires baseline and follow-up liver panels.
What is the half-life of Turinabol?
Roughly 16 hours, long enough that some protocols use a single daily dose, though splitting into two remains common to keep levels steadier.
Does Turinabol cause water retention or gyno like Dianabol?
No — the chlorine atom added to its structure blocks aromatization to estrogen, so it doesn’t carry Dianabol’s water-retention or gynecomastia risk. That non-aromatizing property is unrelated to its liver-toxicity risk, which is still present.
What should you monitor while taking Turinabol?
Liver enzymes (ALT/AST), a full lipid panel (17-alpha-alkylation affects lipids independent of aromatization), and blood pressure. The same monitoring baseline as any 17-alpha-alkylated oral applies here.
This is educational information, not medical advice. Doses and protocols above reflect published references and community practice — protocol decisions belong with your prescribing physician. Generic names used throughout. How this reference is built & how the AI is tested →
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