A 2025 study in Clinical Gastroenterology and Hepatology (Camilleri et al.) measured colonic 5-HT4 receptor expression in semaglutide patients with persistent constipation vs those who adapted
This may further blunt the pituitary glands natural response
For example, reconstituting a 100mg GHK-Cu vial with 5mL of bacteriostatic water produces a concentration of 20mg/mL, where a 2mg dose corresponds to 0.1mL

Product Attributes CAS # : 137525-51-0 Molecular Formula : C62H98N16O22 Sequence (AA) : GEPPPGKPADDAGLV Molecular Weight : 1419.5 g/mol PubChem CID : 9941957 Half-Life : ~4-6 hours Synonyms : Body Protection Compound-157, Gastric Pentadecapeptide BPC157, PL 14736, Bepecin, PL-10 Type : Synthetic research peptide (cytoprotective fragment) Research Focus : Recovery & Performance, Immunity & Inflammation Scientific References Emerging use of BPC-157 in orthopaedic sports medicine Animal | In vitro BPC-157 benefits, dosage, and side effects Observational | Animal | In vitro BPC 157: science-backed uses, benefits, dosage, and safety Observational | Animal | In vitro Pentadecapeptide BPC 157 enhances the growth hormone receptor expression Animal | In vitro Multifunctionality and possible medical application of the BPC 157 peptide Observational | Animal | In vitro BPC-157: miracle healing peptide or hidden danger
Do not buy it from unregulated online vendors or "research chemical" sites
Human growth hormone which researchers in the fitness or bodybuilding space are already intimately familiar with is a serious multi-tasker