BPC-157

BPC-157, explained

The short version: BPC-157 is a lab-made chain of 15 amino acids based on a protein found in human gastric juice. There is a large pile of rat studies behind it, but no completed trial has tested whether it works in people.

What it is

The letters stand for Body Protection Compound. It is a 15-amino-acid fragment modelled on a peptide that occurs naturally in stomach juice, where it is thought to help keep the gut lining intact. Older papers and patents also call it PL 14736, bepecin or PCO-02, so it pays to search under all of those names.

What has been studied

Almost all of it is animal work. A 2025 systematic review in the HSS Journal (Vasireddi and colleagues) screened 544 papers on BPC-157 and musculoskeletal healing and kept 36. Thirty-five were preclinical, mostly in rats with some rabbit work. The models were cut Achilles and quadriceps tendons, cut knee ligaments, crushed or cut muscle, and bone fractures that would not knit.

Those studies point to several mechanisms: more VEGF and new blood vessel growth, more growth hormone receptor, activity in the FAK-paxillin pathway that cells use to attach and move, more nitric oxide, and lower inflammatory signals. All of that was measured in animal tissue.

The human record is two tiny reports. The review's only clinical paper was a 2021 look back at 12 people given knee injections for chronic pain, 7 of whom said they felt better, with no comparison group. A 2025 pilot at a Florida clinic gave intravenous BPC-157 to two adults and found no change in heart, liver, kidney, thyroid or blood sugar markers.

Where the evidence stops

No completed trial has tested whether BPC-157 does anything in people. The review found one registered phase 1 trial whose status has been unknown since 2016, and noted that none of the 36 studies assessed safety or side effects in humans. A two-person pilot can't fill that gap.

Regulators have noticed. In 2023 the US FDA placed BPC-157 in category 2 of its compounding list, the group of ingredients that may present significant safety risks, flagging a possible immune reaction for some routes of use. Its page now files the nomination as withdrawn, with that warning still attached. WADA names it under S0, non-approved substances, banned in and out of competition.

Handling and storage

It arrives as a freeze-dried powder. Once bacteriostatic water goes in, it belongs in the fridge. Our reconstitution and storage guide covers the details, and the calculator does the maths.

Dozens of rat studies, one small knee case series and a two-person safety pilot. That is the entire human record so far.

For research use only. Not for human consumption. Nothing on this page is medical advice.