Ingredient or product comparison
GHK-Cu Cosmetic Complexion Results Timeline Comparison
Week 1–4 Improved radiance, reduced dullness, smoother microtexture Antioxidant enzyme activation (SOD, catalase) reduces oxidative stress; keratinocyte turnover normalizes Subjective self-assessment; profilometry for surface roughness Surface changes are real
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- Week 1–4
- Improved radiance, reduced dullness, smoother microtexture
- Antioxidant enzyme activation (SOD, catalase) reduces oxidative stress; keratinocyte turnover normalizes
- Subjective self-assessment; profilometry for surface roughness
- Surface changes are real but don't reflect deeper structural work yet. Continue protocol
- Week 4–8
- More even tone, reduced appearance of surface irregularities, hydration improvement
- Barrier lipid protection from ROS neutralization; reduced TEWL; melanocyte activity modulation
- Colorimetry for tone uniformity; corneometry for hydration
- This phase represents maximum surface improvement. Structural depth gains require longer commitment
- Week 8–12
- Early firmness changes, subtle elasticity improvement
- New collagen synthesis reaches measurable levels; procollagen processing and secretion into ECM begins
- High-frequency ultrasound for dermal thickness; cutometry for elasticity
- Transition phase. Structural gains begin but haven't matured fully into visible wrinkle reduction yet
- Week 12–16
- Visible wrinkle depth reduction, improved skin firmness, sustained tone evenness
- Mature collagen integration into dermal matrix; lysyl oxidase cross-linking strengthens mechanical support
- Wrinkle depth via 3D optical scanning; elasticity via cutometry
- Full structural remodeling phase. Results plateau and require maintenance dosing to sustain
- Week 16+
- Maintenance of achieved improvements with continued use; gradual regression if stopped
- Collagen turnover rates return to baseline without continued copper-peptide signaling
- Same as week 12–16 methods
- Discontinuation leads to gradual loss of structural gains over 6–12 months as collagen degrades naturally