Objective markers (IGF-1, metabolic panels, and where tested, biological age) typically show measurable improvement
This answer varies on the peptide itself
BPC-157 promotes tissue repair by stimulating collagen production and enhancing blood flow to the affected areas
Problems due to lack of cell division in fast dividing tissues: Anaemia, or any cytopaenia (including leucocytes, lymphocytes, platelets) Mouth ulcers, malabsorption, diarrhoea due to macrocytosis and atrophy of the intestinal mucosa as demonstrated by Foroozan and Trier
Sterile water has no preservative, so a vial mixed with it should be used within hours, not weeks
BPC-157 is a kind of chemical called a peptide, and the Food and Drug Administration treats it and some other peptides as unapproved drugs going so far in 2023 as to explicitly prohibit compounding pharmacies from supplying BPC-157 to patients