Some people who inject peptides purchased online for muscle building, weight loss, or to improve recovery, skin, or sleep do not view themselves as injecting drug users, but experts say they still face safety risks. Both sources frame this as a growing group with injecting behaviour that often occurs outside formal medical guidance.

The outlets differ mainly in emphasis. Medical Xpress focuses on the mismatch between users’ self-perception and the reality that they are injecting substances, and it presents basic safety considerations for “injectors” who may be using peptides. The Conversation highlights the lack of a reliable health expertise source at the point of sale, describing how those who inject peptides may rely on forums, influencers, or gym peers for information instead. Together, they underscore the public-health concern that non-medical peptide use can lead to preventable harms when proper safety advice is absent.