- Grey-market injectable peptides (e.g., BPC-157, GHK-Cu) are unregulated substances bought online from overseas dealers, often labeled 'for research purposes only' as a legal loophole.
- They are popular among biohackers, tech workers, and athletes for claimed benefits like injury recovery, performance enhancement, weight loss, and anti-aging, despite lacking FDA approval and reliable safety data.
- Peptides are short amino acid chains involved in bodily functions; some are synthetic versions of natural proteins, but evidence of therapeutic benefits in humans is insufficient, with pharmaceutical companies not investing in R&D.
- Risks include allergic reactions, unintended activation of harmful pathways, potential acceleration of undiagnosed cancers, acromegaly, injection-site issues, sepsis, and adverse effects from added chemical components.
- Suppliers often avoid liability through disclaimers, leaving users as 'guinea pigs.' Increased interest is driven by social media, influencers, and frustration with conventional recovery, but doctors advise cessation and emphasize proper diagnosis, rehab, and lifestyle fundamentals.