Understand the source comparison
How to Use Glow Stack for Youthful Skin Protocol: Research Application Comparison
GHK-Cu (Copper Peptide) 340 Da Passive transdermal Stimulates collagen I and III synthesis via TGF-β upregulation; chelated copper acts as cofactor for lysyl oxidase Once daily (PM application) First-line collagen stimulator. Clinical evidence strongest among
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- GHK-Cu (Copper Peptide)
- 340 Da
- Passive transdermal
- Stimulates collagen I and III synthesis via TGF-β upregulation; chelated copper acts as cofactor for lysyl oxidase
- Once daily (PM application)
- First-line collagen stimulator. Clinical evidence strongest among cosmetic peptides
- Matrixyl-3000 (Palmitoyl Peptides)
- 578 Da combined
- Passive + liposomal carrier
- Mimics damaged collagen fragments, triggering fibroblast repair response and matrix protein synthesis
- Twice daily
- Synergistic with GHK-Cu. Targets different collagen synthesis pathways
- SNAP-8 (Argireline)
- 1,000 Da
- Requires microneedling or iontophoresis
- Inhibits SNARE complex formation, reducing acetylcholine release and muscle contraction depth (wrinkle reduction)
- Once daily (AM application)
- MW limits passive penetration. Delivery method determines efficacy
- Hyaluronic Acid (Low MW)
- <50 kDa
- Passive humectant
- Binds water in stratum corneum, increasing hydration and peptide diffusion through loosened corneocyte structure
- Twice daily (after peptide absorption)
- Support compound, not primary active. Enhances peptide penetration 15–25%