Last updated: March 2026
Chlorodehydromethyltestosterone (CDMT/Turinabol) was secretly administered to East German Olympic athletes from 1968–1989. A hybrid of Dianabol and Clostebol, it produces lean gains without aromatization. This educational reference covers its pharmacology, documented doping history, hepatotoxicity, and harm reduction context.
Turinabol is structurally Dianabol with a 4-chloro substitution derived from Clostebol. That chloro group blocks aromatization entirely, making it estrogenic side-effect-free — at the cost of lower anabolic potency.
The 4-chloro group on the A-ring of CDMT prevents aromatase from converting it to estrogen. This structural feature — borrowed from Clostebol — eliminates water retention, gynecomastia risk, and estrogenic blood pressure elevation. Users experience dry, lean gains instead of the puffy bulk associated with Dianabol.
Turinabol has relatively low AR binding affinity (roughly 50% of testosterone) but its anabolic:androgenic ratio strongly favors muscle tissue over androgenic effects. The 4-chloro group also reduces androgenic activity — acne, hair loss, and prostate effects are less pronounced than Dianabol at equivalent doses.
Like Dianabol, Turinabol carries a 17α-methyl group enabling oral bioavailability. This modification causes hepatic stress — elevated ALT/AST — though generally considered less hepatotoxic than Dianabol due to lower potency and typically lower doses used. Long-cycle use still risks liver injury including cholestasis.
Despite low androgenic rating, Turinabol suppresses the hypothalamic-pituitary-testicular axis via androgen receptor signaling. LH and FSH decrease, halting natural testosterone production. Recovery after cessation requires weeks to months. SERM-based PCT (tamoxifen/clomiphene) is standard harm reduction.
Data from East German State Plan 14.25 documentation, post-reunification research, and limited clinical literature.
Essential harm reduction for any oral 17α-alkylated compound.
Dosing schedules, interaction warnings, and cycle protocols for 50+ compounds — all in one place.
This page is for educational and harm reduction purposes only. It is not medical advice. Turinabol (CDMT, chlorodehydromethyltestosterone) is a Schedule III controlled substance in the United States. It is banned by WADA and all major sports organizations. The documented East German doping program caused serious, lasting harm to athletes — many of whom were uninformed minors. MeetPeptide does not endorse or encourage the use of controlled substances or participation in doping. Consult a qualified physician before making any decisions regarding hormone use.