Research into the use of anabolic-androgenic steroids (AAS) in fitness and strength-training environments has revealed significant variance in AAS users’ background demographics, experiences, concerns, reasons for initiation, and other central characteristics. In a recent study, we drew upon these results and our own empirical findings, to suggest that men’s use of AAS in the fitness environment can be understood within the framework of an ideal typology, highlighting four different types of AAS users: The Expert type, The Wellbeing type, The YOLO type and The Athlete type. In this chapter, we explore how the typology may contribute to developing prevention, harm reduction and treatment programmes for AAS users.