Tissue Repair Research Peptides

Tissue repair research peptides are reference compounds studied in preclinical models of wound healing, tendon and ligament repair, and gut mucosal protection — with BPC-157 and TB-500 as the two most investigated reagents in this space. This category groups the standalone peptides, co-formulated blends and encapsulated formats built around them so researchers can compare mechanism, format and documentation in one place. Every item is supplied strictly as Research Use Only (RUO) material with a batch Certificate of Analysis; nothing here is intended for human or veterinary use.
Mechanisms investigated
BPC-157 and TB-500 are structurally unrelated peptides studied through different pathways, which is the rationale for both the standalone reagents and the co-formulated blends:

BPC-157 (gastric pentadecapeptide): a synthetic 15-amino-acid peptide derived from a protective protein in gastric juice, studied for cytoprotection, angiogenesis and epithelial healing in vitro and in animal models.
TB-500 / TB-500 (Frag) (thymosin beta-4 peptide): TB-500 corresponds to the actin-binding domain of thymosin beta-4; the fragment version isolates a shorter active region. Both are studied for cell migration and actin regulation in tissue-repair models.
BPC-157 + TB-500 blend: co-formulates both peptides so their distinct mechanisms — cytoprotective signalling and actin-mediated migration — can be investigated together in the same research protocol.
GLOW blend (GHK-Cu, BPC-157, TB-500): adds the copper peptide GHK-Cu to the BPC-157/TB-500 pairing, extending the research focus to dermal and connective-tissue models.
KLOW blend (KPV, GHK-Cu, BPC-157, TB-500): a four-peptide formulation that further adds KPV, studied for its anti-inflammatory profile, alongside the GLOW components.
Capsule formats (BPC-157 Arginate, BPC-157 Arginate + TB-500, TB-500 Capsules): oral-route formulations for researchers studying gastrointestinal exposure; the arginate salt form is used in capsule formulation for stability.

Comparison
CompoundClassPathway / targetResearch focusFormat
BPC-157Gastric pentadecapeptideCytoprotection / angiogenesisGut & soft-tissue repairVial
TB-500Thymosin beta-4 peptideActin binding / cell migrationWound & tendon repairVial
TB-500 (Frag)Thymosin beta-4 fragmentActin-binding domainCell migration researchVial
BPC-157 + TB-500Peptide blendCytoprotection + actin signallingCombined repair researchVial
GLOWPeptide blendCopper-peptide + repair peptidesDermal & connective-tissue researchVial
KLOWPeptide blendRepair peptides + anti-inflammatoryCombined repair & inflammation researchVial
BPC-157 Arginate CapsulesGastric pentadecapeptide (salt form)Cytoprotection / angiogenesisOral-route repair researchCapsules
BPC-157 Arginate + TB-500 CapsulesPeptide blend (salt form)Cytoprotection + actin signallingOral-route combined researchCapsules
TB-500 CapsulesThymosin beta-4 peptideActin binding / cell migrationOral-route repair researchCapsules

Comparison

What is the difference between BPC-157 and TB-500 for tissue-repair research?

BPC-157 is a 15-amino-acid synthetic peptide derived from a gastric protein, studied for cytoprotection and angiogenesis. TB-500 is a much larger peptide corresponding to the actin-binding domain of thymosin beta-4, studied for cell migration. See our BPC-157 vs TB-500 comparison for the full breakdown.

What is the difference between full TB-500 and the TB-500 fragment?

Full TB-500 corresponds to the complete actin-binding sequence of thymosin beta-4, while the fragment isolates a shorter active region of that domain. Our TB-500 full vs fragment article compares what each form is studied for.

Is BPC-157 legal to buy for research in Europe?

BPC-157 is supplied strictly as a Research Use Only reference compound for in vitro and animal studies, not as a medicine or supplement. Legal status for import and use varies by EU member state — see our BPC-157 legality in Europe guide for details.

What are the GLOW and KLOW peptide blends, and how do they differ?

GLOW co-formulates GHK-Cu with BPC-157 and TB-500 for combined dermal and connective-tissue research; KLOW adds KPV as a fourth peptide, extending the focus to anti-inflammatory research questions. See our GLOW and KLOW explainer articles for the individual component rationale.

Do you provide a Certificate of Analysis for every tissue-repair peptide batch, including capsules?

Yes. Every compound and blend in this category, in both vial and capsule format, ships as research-use-only material with a batch-specific Certificate of Analysis covering identity and purity by HPLC and mass spectrometry.