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Tissue repair

BPC-157

The internet's favourite healing peptide: a mountain of rodent data and almost no controlled human evidence.

L2PreclinicalExperimental / researchUnclearVery low confidenceLast reviewed 2026-08-23
SC injection· unapprovedNasal· unapprovedOral· unapproved

Also known as: Body Protection Compound 157, PL 14736, pentadecapeptide BPC 157

Evidence passport

Last reviewed 2026-08-23

Evidence level
L2Preclinical
Confidence
Very low confidence
Human efficacy
12/100
Human safety
15/100
Regulatory status
Experimental / research
Development
Unclear
Routes
SC injection· unapprovedNasal· unapprovedOral· unapproved
Evidence base
Mostly preclinical
Furthest stage
Not established
Source curation
Sources fully curated
Clinical maturity
Preclinical, with very limited early human study activity

Most of this evidence comes from animals and cells

The supporting research for BPC-157 is predominantly preclinical (Level 1–2). That is a legitimate starting point for science and a poor basis for personal decisions. Human results are not simply a scaled-up version of mouse results.

Overview

Human evidence12/100
Preclinical evidence78/100
Human safety evidence15/100

Clinical maturity: Preclinical, with very limited early human study activity

Routes & formulations

Marketed / research routes — never approved

SC injection· unapprovedNasal· unapprovedOral· unapproved

Regulatory material describes products marketed as injections, nasal sprays and oral capsules. That is a description of the unregulated market, not evidence that any route works or is safe. No approved formulation exists for any route.

Route availability is not evidence of efficacy, and evidence from one route does not transfer to another. The Registry never provides dosing or sourcing information.

Peptide lifecycle

  1. Discovery

  2. Preclinical

  3. Phase I

  4. Phase II

  5. Phase III

  6. Approved

UnclearFurthest stage not established in our curated record

No active pharmaceutical development programme identified in our curated sources; only limited historical early human study activity.

What it is

A synthetic 15-amino-acid sequence derived from a protein found in gastric juice. It has been studied for decades in rodents across an unusually wide range of injury models.

What people claim

  • Heals tendons, ligaments and muscle tears
  • Repairs the gut lining and helps IBD
  • Reduces inflammation and speeds recovery from almost anything

What the evidence actually says

The preclinical literature is large, consistent and mostly produced by a small number of related research groups. The human literature is close to empty: no adequately powered, published, randomised controlled trial supports the tendon and injury-recovery claims that dominate online discussion. Enthusiastic rodent results plus enthusiastic forum posts do not add up to clinical evidence.

Human evidence

  • No adequately powered published randomised controlled trials supporting musculoskeletal healing claims.
  • Limited early-phase clinical activity historically explored in inflammatory bowel disease; results have not established efficacy.
  • Everything else circulating is anecdote (Level 0).

Preclinical evidence

  • Numerous rodent studies reporting accelerated tendon, ligament, muscle and gut healing.
  • Reported protective effects against NSAID-induced gastrointestinal injury in animals.
  • Concentration of output within a small research network is a replication concern, not a conspiracy claim — independent replication is simply thin.

Animal and cell findings are Level 1–2 evidence.

Mechanism and pathways

  • Proposed upregulation of VEGF signalling and angiogenesis at injury sites.
  • Interaction with nitric oxide pathways.
  • Proposed effects on growth-hormone receptor expression in tendon fibroblasts.
  • All of this is mechanistic (Level 1-2) and does not establish clinical benefit.

Safety and unknowns

  • No systematic human safety dataset exists. Absence of reported harm is not evidence of safety.
  • The FDA's 503A Category 2 listing flags significant safety risks for compounding — a regulatory safety concern, not proof of harm in any individual.
  • Product quality is a real and separate risk: unapproved supply chains have documented issues with purity, sterility and mislabelling.
  • Because it is injected by non-clinicians in most real-world use, infection and technique risks are underappreciated.

Cancer relevance

Theoretical / mechanistic concern only

The most common concern is that promoting angiogenesis could theoretically support tumour growth. This is a mechanistic hypothesis (Level 1), not a demonstrated human cancer risk — no human data show BPC-157 causes cancer. Equally, no human data show it is safe in people with cancer. Both statements are true at once, and that is exactly the point.

Regulatory status

Not an approved medicine in any major region. The FDA has placed BPC-157 on the 503A Category 2 list of bulk substances that raise significant safety risks for compounding, which restricts its use in compounded preparations. It remains widely sold as a 'research chemical'.

  • Baseline · United States

    Placed on the FDA 503A Category 2 list of bulk substances raising significant safety risks for compounding; not an approved medicine in any major region.

Key study types

  • L2PreclinicalRodent tendon and gut injury models

    Preclinical animal studiesRats and mice

    Consistent healing effects in animals; concentrated within a small research network.

Evidence grade

L2PreclinicalVery low confidence

Animal, organoid or tissue studies. Mice are not tiny humans.

What would change our rating?

  • A published, adequately powered randomised controlled trial in a defined injury population.
  • Independent replication of core preclinical findings outside the originating research network.
  • Any published human pharmacokinetic and safety dataset.

References and sources

Sources fully curated

Source hierarchy: regulatory documents and trial registries first, peer-reviewed work next, sponsor material flagged as non-independent. We never use supplier or clinic marketing as evidence, and where a verified source has not yet been curated we say so rather than inventing one.

Evidence change history

  1. 2026-07-10

    Baseline entry: registry position set to preclinical-only for musculoskeletal healing claims.

    L2PreclinicalBaseline entry
    Reviewed the available literature landscape. Preclinical breadth is large; controlled human evidence for tendon and injury claims remains absent, so confidence stays very low.

Related claims we’ve checked

Unsupported as statedL2PreclinicalTissue repair

BPC-157 heals tendons in humans.

Unsupported as stated — the human trials simply don't exist.

  • The tendon-healing story comes almost entirely from rodent models (Level 2).
  • No adequately powered published randomised controlled trial in humans supports it.
  • 'Unsupported' means we don't know it works — not that we know it fails. Those are different claims and the difference matters.
Last reviewed 2026-07-10Compound profile
Unsupported as statedL1MechanisticSafety

Research-grade peptides are the same as pharmaceutical-grade medicines.

Unsupported — 'research use only' is a legal category, not a quality guarantee.

  • Unapproved supply chains have documented problems with purity, sterility, mislabelled content and dose accuracy.
  • A certificate of analysis supplied by the seller is not independent verification.
  • This risk is separate from — and often larger than — the pharmacology of the molecule itself.
Last reviewed 2026-07-08Compound profile