bpc 157 tight junction intestinal permeability Mechanisms regulating barrier integrity and its pathological implications BPC-157 & The Gut-Brain Axis:
Description
And since your body cant make it, you have to get it from animal-based sources or supplements

doi: 10.3109/00207454.2015.1077331

While frequently referenced in similar research areas, they differ in their mechanisms and primary areas of investigation

BPC-157 may improve digestive function A common outcome of intra-abdominal surgery or those with digestive health problems - is a gastrointestinal fistula (GIF)