# BPC-157: What the Research Record Actually Shows — Medicine BPC-157 > BPC-157 is a 15-amino-acid research peptide studied mostly in rodents. A loud, sober digest of the animal evidence, the three small human pilots, and where compounded access stands. The animal record is broad and repeatable. The human record is three tiny uncontrolled pilots. This page reads both, loudly, and cites every number. ## What the BPC-157 record actually shows BPC-157 is a synthetic 15-amino-acid peptide derived from a partial sequence of a protein found in human gastric juice, and almost everything anyone knows about it comes from animals. Across rodent models it has accelerated repair of tendon, muscle, and gut tissue, with effects most consistently linked to angiogenesis — the growth of new blood vessels [3]. That is the honest headline: a broad, repeatable preclinical signal, paired with a human dataset of just three small uncontrolled pilots [8]. We built this site loud on purpose. The internet shouts about BPC-157 — weight loss, muscle building, raised testosterone — and almost none of that is in the published evidence [8]. So the graphics shout and the text stays sober. Every quantitative claim here points to a study you can open, and every gap gets a caution stamp instead of a hand-wave. The foundational work is cytoprotection. In a 2004 rat study, BPC 157 cut gastric ulcer area and accelerated healing, with an ulcer-formation inhibition ratio of 45.7–65.6% at 400–800 ng/kg, and intramuscular delivery outperformed intragastric [4]. The tissue-repair story extends from there to tendon, where a fully transected rat Achilles tendon healed faster across biomechanical, functional, and microscopic measures after 10 µg per rat [1]. Those are real, cited results — measured in rats, not promised in people. Where the evidence stops, we stop. There is no validated human pharmacokinetic profile, no large controlled human efficacy trial, and no FDA-approved BPC-157 product for human use [8]. The peptide also clears fast — an elimination half-life under 30 minutes in a rat/dog study — so nothing here implies a one-shot effect [2]. For the regulatory picture, see [BPC-157 legal status and 503A category](/legal-status); for how the doses are reported, see [how BPC-157 doses are expressed in studies](/dosage). ## BPC-157: A Stable Gastric Pentadecapeptide BPC-157 peptide is the short, stable fragment at the center of this whole literature, and its identity is precise even when the hype is not. It is a pentadecapeptide — fifteen amino acids, sequence Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val — with molecular formula C62H98N16O22 and a molecular weight of 1419.53 Da (CAS 137525-51-0, PubChem CID 108101). The authors call it a 'stable gastric pentadecapeptide' because it is reported stable in human gastric juice, which is why anyone studies oral or peroral routes at all. BPC-157 is synthetic. It is derived from a partial sequence of Body Protection Compound found in gastric juice, but the peptide itself is a lab-made stable fragment, not a hormone circulating in your blood. It is not a growth hormone, though in tendon-fibroblast work it up-regulated the growth-hormone receptor [1]. It is supplied for laboratory research, frequently as the acetate salt, and it is not an approved drug anywhere [8]. ## What does BPC-157 do in the body? In animal models BPC-157 acts as a cytoprotective peptide that accelerates repair of tendon, muscle, gut mucosa, and other tissues, with its effects most consistently tied to angiogenesis through VEGFR2-Akt-eNOS signaling [3]. It is described as protecting and rebuilding tissue rather than driving a single dramatic response. ### Is BPC-157 a growth hormone? No. BPC-157 is a synthetic 15-amino-acid peptide, not a growth hormone. In tendon-fibroblast studies it up-regulated the growth-hormone receptor at the mRNA and protein level, which is a sensitization effect, not hormone activity [1]. Calling it a 'growth peptide' online does not make it a hormone. ## Read the record by the thing you came for If you came for the repair claims, start with [BPC-157 mechanism of action](/research), where the angiogenesis pathway and the strongest tendon and muscle studies live. If you came for the recovery and body-composition talk, [BPC-157 muscle recovery research](/muscle-recovery) is where we separate 'faster healing of a crush injury in a rat' from 'builds muscle' — they are not the same claim [5]. If you came for the practical question — is it legal, can a compounding pharmacy make it — go straight to [BPC-157 legal status and 503A category](/legal-status). And if you want to verify anything, the [BPC-157 research references](/references) list carries every citation with its PMID or DOI. This is a noticeboard, not a counter: nothing here is for sale, and nothing here is dosing advice. --- A loud noticeboard for the BPC-157 record — every rat study stamped to its source, every human-data gap and the FDA 503A status posted in plain neon, with no clinic behind the board and nothing here dispensed or sold.