BACKGROUND Like many other goods and services, performance and image enhancing drugs (PIEDs), and particularly androgenic anabolic steroids (AAS), are increasingly discussed and promoted by social media influencers. Little, however, is known about the influencers specialized in PIEDs and which drugs and services they promote and sell.

AIMS Against this background, the study has been intended to identify prominent influencers specialized in PIEDs, examine the market activities they engage in, and assess the latter's legality.

METHODS We first searched the clean internet to identify prominent PIED influencers. Second, we conducted a six-month-long, non-reactive digital ethnography of the social media accounts of 20 influencers and, via a content analysis, identified the market activities they engage in. Third, we assessed the latter's legality, primarily using the EU legislation as a benchmark.

FINDINGS The selected influencers are all current or former bodybuilders, predominantly male and from the United States. Many of them have developed a considerable number of followers, in three cases exceeding one million. They engage in various market activities that span the whole spectrum of legality, from legal to illegal, with many activities having an uncertain, but often dubious, legal status.

CONCLUSIONS Though they may promote harm reduction for some users, PIED influencers also promote the public acceptance of PIED use beyond the bodybuilding community and enhance access to PIEDs for millions of people. Multifaceted policy interventions are required, aiming at preventing influencers from becoming a major source of information on, and route of access to, PIEDs.