Ingredient or product comparison
GHK-Cu Help Fine Lines: Comparison Table
Topical cream (2–3%) Applied twice daily 8–12 weeks 15–20% increase in dermal collagen after 12 weeks (ultrasound-measured) Penetration depth. Effectiveness depends on formulation and skin barrier integrity Works for mild photoaging; requires consistent long-t
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- Topical cream (2–3%)
- Applied twice daily
- 8–12 weeks
- 15–20% increase in dermal collagen after 12 weeks (ultrasound-measured)
- Penetration depth. Effectiveness depends on formulation and skin barrier integrity
- Works for mild photoaging; requires consistent long-term use; slower onset than injectable
- Injectable subcutaneous
- 1–2mg per site, weekly
- 6–8 weeks
- 25–30% increase in collagen density after 8 weeks (dermal imaging)
- Requires sterile reconstitution, proper injection technique, and refrigerated storage
- Fastest and most pronounced results; ideal for moderate to severe fine lines
- Oral supplementation
- Not applicable
- Not effective
- No measurable dermal impact
- GHK-Cu is degraded by gastric acid and proteolytic enzymes before systemic absorption
- Avoid entirely. Oral GHK-Cu does not reach the skin in biologically active form
- Microneedling + topical
- 0.5–1.0mm needle depth + 2% solution
- 4–8 weeks
- Enhanced penetration increases efficacy to near-injectable levels
- Requires sterile technique and understanding of post-needling skin barrier compromise
- Bridges topical and injectable benefits; combines mechanical collagen induction with peptide signaling