Oliver Catlin of @bscgcertified has done a great deep dive into the peptide supplement market here. It's focused on Amazon and largely framed through the lens of his work in sports anti doping, Detection and in vitro metabolism of the confiscated peptides BPC 157 and MGF R23H Cox 2017 Drug Testing and Analysis Wiley Online Library Stable Gastric Pentadecapeptide BPC 157 as a Therapy and Safety Key: A Special Beneficial Pleiotropic Effect Controlling and Modulating Angiogenesis and the NO System BPC 157 was discovered over 30 years ago. Its patent was licensed to multiple pharmaceutical companies over time, but none identified meaningful commercial potential. A Phase 1 human trial (NCT02637284), registered in 2015, Gastric pentadecapeptide body protection compound BPC 157 and its role in accelerating musculoskeletal soft tissue healing Cell and Tissue Research Springer Nature Link