BPC-157 is a synthetic peptide that is being investigated for its regenerative effects. It shows high efficacy for rats suffering toxic or surgical trauma, but there is currently little evidence that it provides benefits for people.
 
BPC-157 has various possible (potentially overlapping) mechanisms of action, including promoting nitric oxide synthesis, activating cells involved in tissue repair, stimulating the synthesis of growth factors, and inhibiting inflammation.

BPC-157 can be taken orally, topically, or via injection. Oral ingestion of peptides like BPC-157 wouldn’t normally be expected to have a direct effect on tissues outside of the gastrointestinal tract (like tendons and nerves) because peptides aren’t easily absorbed into circulation. However, studies in rodents have suggested that oral ingestion can have systemic effects, meaning that the feasibility of this route of delivery can’t be ruled out.