Side-by-side · Regenerative peptide comparison
BPC-157 vs TB-500 vs GHK-Cu vs KPV.
Four of the most-studied research peptides in tissue-repair, wound-healing, and regenerative-biology programs. They differ in source (synthetic vs endogenous), mechanism, and the maturity of the published literature. This page helps researchers choose the right reagent for their specific assay or animal model.
| BPC-157 | TB-500 (Thymosin β4 frag) | GHK-Cu | KPV | |
|---|---|---|---|---|
| Source | Synthetic fragment of gastric BPC protein | Synthetic fragment of thymosin β4 | Endogenous copper-binding tripeptide (Gly-His-Lys + Cu²⁺) | Synthetic C-terminal tripeptide of α-MSH |
| Length | 15 residues | 4 residues (Ac-SDKP) | 3 residues (Gly-His-Lys) | 3 residues (Lys-Pro-Val) |
| CAS | 137525-51-0 | 77591-33-4 (fragment) | 49557-75-7 (peptide) / 89079-83-6 (Cu complex) | 85584-87-6 |
| Molecular weight | 1,419.5 Da | 488.5 Da (tetrapeptide) | 340.4 Da (peptide) / 403.9 Da (Cu complex) | 342.4 Da |
| Mechanism | VEGFR2-Akt-eNOS, FAK-paxillin, NO synthesis; promotes fibroblast migration and angiogenesis | Actin sequestering; promotes cell migration and differentiation | Copper donor to lysyl oxidase / SOD; upregulates collagen, elastin, decorin in dermal fibroblasts | MC1R/MC3R binding on immune cells; inhibits NF-κB translocation |
| Primary research use | Tendon / ligament fibroblast assays, GI mucosal models, vascular angiogenesis | Wound-healing scratch assays, hair-follicle studies | Dermal fibroblast collagen/elastin, hair-papilla proliferation, antioxidant assays | Anti-inflammatory cell-culture, IBD mucosal models, wound healing |
| Oral bioavailability | Yes (demonstrated in rodent) | Limited | Limited (mainly topical / IP) | Yes (demonstrated in rodent IBD) |
| Pigmentation side-effect | No | No | No | No (tripeptide avoids α-MSH pigmentation) |
| WADA status | S0 prohibited (non-approved) | S0 prohibited | Not listed | Not listed |
| Helix SKU | HX-BPC5 | (not stocked) | HX-GHK50 / HX-GHK100 | HX-KPV10 |
| Price (USD) | $44 / 5 mg × 10 vials | — | $72 / 50 mg × 10 vials | $72 / 10 mg × 10 vials |
How researchers choose between them
| If your lab needs… | Best fit |
|---|---|
| Tendon / ligament fibroblast migration assay | BPC-157 |
| GI mucosal protection model | BPC-157 or KPV |
| Dermal fibroblast collagen / elastin expression | GHK-Cu |
| Anti-inflammatory readout without pigmentation confound | KPV |
| Hair-follicle dermal-papilla proliferation | GHK-Cu or TB-500 |
| Anti-inflammatory cell-culture with intact NF-κB machinery | KPV |
| Oral / systemic administration (rodent) | BPC-157 or KPV |
| Topical / cosmetic-dermatology formulation work | GHK-Cu |
| Angiogenesis tube-formation assay | BPC-157 or GHK-Cu |
| Established literature with most-published data | BPC-157 |
| Best value at low-dose chronic protocols | BPC-157 |
| Combination protocol (multiple regenerative axes) | BPC-157 + GHK-Cu + KPV |