google scholar bpc 157 Pentadecapeptide Enhances the Growth Hormone Receptor Expression in Tendon Fibroblasts BPC-157 – Prime Human Labs

Some sources have suggested that B12's role in maintaining the nervous system could theoretically influence follicle nerve supply, but there is no established clinical evidence linking this to hair loss, and this should be regarded as speculative

PMID 16219884

It has shown remarkable stability in experiments, as seen in the Stable gastric pentadecapeptide BPC 157: novel therapy in gastrointestinal tract study by Sikiri et al

injection of non-pharmaceutical-grade compounds carries infection and inflammatory risk independent of the peptide itself Which biomarkers are relevant if you are exploring peptide science

Phang JM, Liu W, Hancock CN, Fischer JW