A Trace ‘Tides Primer: Understanding the 15-amino-acid peptide commonly called Body Protection Compound 157
By: Laura Mildon
BPC-157 is a synthetic peptide composed of 15 amino acids. A peptide of this length is called a pentadecapeptide. Its name is commonly expanded as “Body Protection Compound 157”; that name identifies the compound and should not be interpreted as an established biological benefit.
Early publications described BPC-157 as a fragment associated with a gastric-juice peptide called BPC. This historical description provides context for its development, while its defined amino acid sequence provides a more precise way to identify the research compound.
| Property | Description |
| Peptide length | 15 amino acids |
| One-letter sequence | GEPPPGKPADDAGLV |
| Expanded sequence | Gly–Glu–Pro–Pro–Pro–Gly–Lys–Pro–Ala–Asp–Asp–Ala–Gly–Leu–Val |
| Molecular formula | C₆₂H₉₈N₁₆O₂₂ |
| Molecular weight | Approximately 1,419.5 g/mol |
| PubChem identifier | CID 9941957 |
The formula and molecular weight above describe the parent peptide. Salt forms require separate identification; for example, an acetate-containing material should not automatically be assigned the same overall composition.
Chemical identity and molecular forms
BPC-157 appears in published research from at least 1993. That year, Sikirić and colleagues, with an affiliation at the University of Zagreb in Croatia, published an account of BPC and described a characterized 15-amino-acid fragment designated BPC-157.
This establishes an early published account. It does not, by itself, establish the exact date of the compound’s initial discovery.
The following papers offer starting points for understanding BPC-157’s research history and selected laboratory findings. They do not establish an intended application for a commercially supplied research material.
This publication introduced the authors’ gastric BPC research framework and discussed the characterized BPC-157 fragment. It is useful for tracing the compound’s terminology and early scientific history.
Researchers examined rat-derived tendon explants and cultured tendon fibroblasts. They reported changes in cell migration and signaling involving focal adhesion kinase, or FAK, and paxillin—proteins associated with cell adhesion and movement.
These observations concern specific laboratory models. They do not establish that the same responses occur across other experimental systems.
A subsequent study examined growth hormone receptor expression in cultured rat tendon fibroblasts. The authors reported changes in receptor expression and investigated associated signaling responses.
This is a finding about receptor expression in a particular cell model; it should not be interpreted as evidence of increased growth hormone production.
A reported change in cell behavior does not necessarily identify a molecule’s direct target or fully explain its mechanism. Questions remain about BPC-157’s molecular targets and how consistently proposed mechanisms explain findings across experimental models. FDA’s scientific review describes its mechanisms as poorly understood.
BPC-157 is not an FDA-approved drug. Publication of a study or inclusion in a chemical database does not constitute FDA approval. FDA’s scientific review also identifies substantial gaps in its characterization and safety evidence.
DISCLAIMER: These statements are for research purposes only and have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
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