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For research purposes, they are commonly reconstituted using bacteriostatic (BAC) water (sterile water with 0.9% benzyl alcohol) to prevent bacterial growth

Gopal Grandhige, MD, FACS, Board-Certified Surgeon Last Reviewed: March 16, 2026 BPC-157 typically begins working within the first one to two weeks, with most patients noticing subtle improvements such as reduced soreness, better digestion, and decreased inflammation during this early phase