bpc-157 modulates nitric oxide Stable Gastric Pentadecapeptide BPC 157 as a Therapy and Safety Key: A Special Beneficial Pleiotropic Effect Controlling and Modulating Angiogenesis and the NO-System BPC-157 and the gut–brain axis:
Description
Dosing, in Practice Commonly observed research protocols land around 50 mg/day to start, titrating to 100 mg/day, taken orally, usually morning and fasted

Your needs might be different, so its best to ask your doctor whats right for you

What is the difference in pain between IM and SubQ injections

doi: 10.2147/NDT.S58841

It's a fragment of a protein found in human gastric juice, and its reputation is built on its formidable regenerative capabilities
