BPC-157

As one of the best peptides UK for regenerative signalling research, BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide (15 amino acids: GEPPPGKPADDAGLVG) originally derived from human gastric juice. Its mechanism of action is pleiotropic, centring on the upregulation of vascular endothelial growth factor (VEGF) signalling and the subsequent promotion of angiogenesis — the formation of new blood vessels from pre-existing vasculature. BPC-157 activates the VEGFR2/Akt/eNOS signalling pathway in endothelial cells, stimulating endothelial cell proliferation, migration, and tube formation, which enhances vascular supply to damaged tissues. Concurrently, BPC-157 modulates fibroblast activity — the cells responsible for collagen deposition during tissue repair — promoting organised collagen matrix formation rather than disordered scar tissue. The peptide also upregulates the expression of growth hormone receptor and EGF receptor in fibroblasts, sensitising repair tissues to endogenous growth factor signalling. In gastrointestinal mucosa, BPC-157 accelerates healing through upregulation of VEGF and EGF in gastric mucosal cells, and modulation of the prostaglandin/cyclooxygenase pathway. Additional mechanisms include modulation of the dopamine/serotonin system (relevant to tendon-to-bone healing), upregulation of F-actin formation, and anti-inflammatory effects through suppression of oxidative stress and cytokine signalling.