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Tissue repair is not an event but a sequence of overlapping phases. Placing each peptide in that sequence is the best way to interpret what each study measures and why certain compounds are investigated in combination.
Hemostasis (minutes)
Platelet aggregation and fibrin clot. Platelets release growth factors (PDGF, TGF-β, VEGF) that set everything else in motion.
Inflammation (1–5 days)
Neutrophils arrive, followed by macrophages, which clear debris and shift from a pro-inflammatory (M1) to a reparative (M2) profile.
Proliferation (days to weeks)
Angiogenesis, migration of fibroblasts and epithelial cells, deposition of provisional matrix (type III collagen).
Remodeling (weeks to months)
Collagen III is replaced by collagen I, fibers reorganize and tissue strength increases progressively.
Map of the repair peptides
| Peptide | Phase where its literature concentrates | Described mechanism |
|---|---|---|
| BPC-157 | Proliferation (angiogenesis) | VEGFR2 and nitric oxide signaling; fibroblast migration |
| TB-500 / Tβ4 | Proliferation (migration) | G-actin sequestration and cell motility |
| GHK-Cu | Remodeling | Collagen and elastin synthesis; metalloproteinase modulation |
| KPV | Inflammation | Attenuation of NF-κB and pro-inflammatory cytokines |
Read this way, the logic of the blends (BPC-157 + TB-500, GLOW, KLOW) becomes clear: each component targets a different phase. But design logic is not evidence of effect: the literature describes each peptide separately and there are no controlled studies of the combinations.
Slow-healing tissues
Tendon and ligament are poorly vascularized and have low cellularity, so they repair slowly and with tissue of lower quality than the original. That is why many repair models focus on them: they are the setting where an angiogenic or migratory stimulus would have the most room to show differences.
Faster closure in an animal model does not equal better-quality tissue. The most informative studies also measure biomechanical strength and histology of the repaired tissue, not just closure time.
Catalogue compounds mentioned in this lesson
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