Ingredient or product comparison
GHK-Cu Cosmetic Receptor Pharmacology: Formulation Comparison
TGF-β Receptors (Smad pathway) 1–10 nM (dermis) 30 minutes (Smad phosphorylation) 24–48 hours (gene transcription) Primary collagen synthesis pathway. Requires sustained exposure for maximal COL1A1 upregulation; single-dose effects dissipate within 72 hours In
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- TGF-β Receptors (Smad pathway)
- 1–10 nM (dermis)
- 30 minutes (Smad phosphorylation)
- 24–48 hours (gene transcription)
- Primary collagen synthesis pathway. Requires sustained exposure for maximal COL1A1 upregulation; single-dose effects dissipate within 72 hours
- Integrin Receptors (FAK signaling)
- 10–50 nM (dermis)
- 5–15 minutes (FAK phosphorylation)
- 6–12 hours (cytoskeletal remodeling)
- Mediates fibroblast migration and MMP-1 suppression. Effect is concentration-dependent with desensitization above 100 nM
- MMP Active Sites (direct inhibition)
- Equimolar with MMP (50–200 nM)
- Immediate (competitive binding)
- 2–4 hours (reversible inhibition)
- Fastest-acting mechanism but shortest duration. Requires continuous presence for sustained effect on collagen degradation
- Nrf2/ARE Pathway (antioxidant genes)
- 5–20 nM (nuclear translocation threshold)
- 4–8 hours (Nrf2 stabilization)
- 48–96 hours (SOD1 protein expression)
- Slowest pathway but longest-lasting. Antioxidant enzyme upregulation persists 3–4 days post-treatment