Winstrol Depot 100 mg/mL is a concentrated injectable suspension containing non-esterified stanozolol. Unlike ester-based formulations, its depot characteristics are determined by the suspension vehicle, crystal structure, and particle-size specifications rather than enzymatic ester hydrolysis.

Stanozolol is a synthetic androgenic-anabolic compound structurally derived from dihydrotestosterone. It interacts with androgen receptors and influences androgen-responsive gene transcription associated with protein metabolism and anabolic cellular processes.