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There is no legitimate medical or non-medical dose. Turinabol is a DEA Schedule III controlled substance with no current accepted supplement or longevity use; this library does NOT provide a dosing protocol. For historical and harm-reduction context only: a controlled anti-doping administration study used a single 5 mg oral dose, and the GDR program used escalating illicit doses in athletes. None of this is an endorsement of self-administration — possession or use without a prescription is illegal.

Any time

None — no legitimate over-the-counter, supplement, or prescription form is endorsed

• Anyone seeking it for body composition or athletic performance — a DEA Schedule III controlled substance with no legitimate medical use; possession/use without a prescription is illegal, and it is not a dietary supplement
• Women and adolescents — documented irreversible virilization; the GDR program's worst harms fell on women and underage girls
• Pre-existing liver disease or elevated liver enzymes — 17α-alkylated and hepatotoxic (transaminitis, cholestasis, peliosis, liver-tumour risk)

• Warfarin / oral anticoagulants
• Hepatotoxic drugs / alcohol
• Other anabolic steroids / testosterone / SARMs