Yes, but it is uncommon
Peer-reviewed studies and the Biden-era FDA warned that unapproved peptides like BPC-157 carry significant public health risks, including potential immunogenicity, unknown systemic toxicities, and lack of sterility from gray-market compounding
Here's what the combined peptide approach targets: Accelerated Injury Recovery Multi-pathway tissue repair means the body can address multiple healing bottlenecks simultaneously
Taylor and Francis, Washington, DC, pp 171191 Scown TM, Santos EM, Johnston BD, Gaiser B, Baalousha M, Mitov S, Lead JR, Stone V, Fernandes TF, Jepson M, van Aerle R, Tyler CR (2010) Effects of aqueous exposure to silver nanoparticles of different sizes in rainbow trout
COAs help verify peptide identity, purity percentages, and analytical testing standards before laboratory use