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Peptides / BPC-157

Panel: recommendedBody protection compoundNot FDA approved

BPC-157

BPC-157 is a lab-made chain of 15 amino acids copied from part of a protein found in human stomach juice. The name stands for body protection compound. It was developed in Croatia in the 1990s, where it was also tested under the code name PL 14736. It is one of the most popular peptides sold online, mainly for injuries.

Reviewed for
Ulcerative colitis
Committee vote
8 yes, 6 no, 1 abstain
Strongest evidence
Small human studies
Legal to compound in the US
Not yet

Effects studied or claimed

What it is promoted for, and where each effect has actually been seen

  • Faster healing of tendons, ligaments and muscleAnimals
  • Protection of the stomach and gut lining, including ulcer and colitis modelsAnimals
  • Growth of new blood vessels into injured tissueAnimals
  • Less inflammation and some nerve protectionAnimals
  • Relief of knee painSmall human report

How it is thought to work

In animal studies it encourages new blood vessels to grow into damaged tissue and interacts with the nitric oxide system, which controls blood flow. Both would speed up repair. Whether the same happens in people at the doses sold online is unknown.

What the evidence shows

In animals and the lab

Hundreds of rodent studies, most from a single research group in Zagreb, report faster healing of tendon, ligament, muscle, bone and gut injuries. Independent replication is limited.

In people

Very little. There were early trials as an enema for ulcerative colitis, a report of 12 people with knee pain given injections into the joint, and a small pilot in bladder pain (interstitial cystitis). When FDA staff reviewed it for ulcerative colitis, the main efficacy evidence they found was a meeting abstract on 46 patients, and it used an enema rather than the injections people actually use.

Safety and unknowns

Long-term safety in people has not been studied. Because it promotes new blood vessels, researchers have raised a theoretical concern that it could help existing tumours grow. Products bought online are unregulated, and injecting a non-sterile product risks infection. It has been banned in sport by the World Anti-Doping Agency since 2022.

FDA review

Reviewed for ulcerative colitis. FDA staff recommended against it, citing limited evidence and the approved treatments that already exist. The advisory committee voted 8 to 6, with 1 abstention, to recommend it anyway.

Committee votes are advice to the FDA. A peptide can only be compounded legally once the FDA adds it to the 503A bulks list through formal rulemaking, which has no fixed deadline.

Sources

Analysis

A healing peptide with a thin human record

Peptide Evidence IndexBiology 6.5/10In people 2/10Index 3.1, rank 9 of 15See the full index

BPC-157 is sold mainly as a repair agent for tendons, ligaments, muscle and the gut. The idea comes from a large body of rodent work from Predrag Sikiric's group in Zagreb. In one of the most cited studies, rats with a cut Achilles tendon that received BPC-157 showed better tendon strength and structure than untreated animals (Staresinic and colleagues, 2003). Similar results have been reported for muscle, bone and colitis models, mostly by the same group.

The human evidence is far smaller. In a retrospective report from a US clinic, 12 people with chronic knee pain received a single injection into the joint; 7 of the 12 described relief lasting more than six months (Lee and Padgett, 2021). The same clinic later reported that 10 of 12 women with interstitial cystitis had complete symptom relief after bladder injections (Lee and colleagues, 2024). Neither study had a control group, so placebo effects and natural recovery cannot be ruled out.

Our view. BPC-157 has one of the most consistent animal signals of any peptide on this list, which explains its popularity in sports medicine. Until a placebo-controlled human trial is run, the benefit in people remains a plausible hypothesis rather than a demonstrated effect, and its long-term safety is unknown.

Studies and reports cited

  1. Staresinic M et al. Gastric pentadecapeptide BPC 157 accelerates healing of transected rat Achilles tendon. J Orthop Res, 2003
  2. Lee E, Padgett B. Intra-articular injection of BPC 157 for multiple types of knee pain. Altern Ther Health Med, 2021
  3. Lee E, Walker C, Ayadi B. Effect of BPC-157 on symptoms in patients with interstitial cystitis: a pilot study. Altern Ther Health Med, 2024

Summary of published research for general information. It is not medical advice and not a recommendation to use this substance.

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General information, not medical advice. Do not buy or inject unregulated peptides.