Ingredient or product comparison
GHK-Cu Microneedling Delivery: Protocol Comparison
Topical-Only (No Needling) N/A Applied to intact skin 2–3% dermal penetration Multiple studies confirm stratum corneum blocks 95%+ Ineffective for therapeutic collagen synthesis. Peptide never reaches fibroblasts GHK-Cu Microneedling Enhanced Delivery Protocol
This source-based comparison does not add ratings or recommend a winner.
- Topical-Only (No Needling)
- N/A
- Applied to intact skin
- 2–3% dermal penetration
- Multiple studies confirm stratum corneum blocks 95%+
- Ineffective for therapeutic collagen synthesis. Peptide never reaches fibroblasts
- GHK-Cu Microneedling Enhanced Delivery Protocol
- 1.0–1.5mm
- Within 60 seconds post-needling
- 40–50% dermal penetration
- Journal of Cosmetic Dermatology: 12–17× absorption vs topical
- Gold standard for peptide delivery. Clinically validated mechanism
- Pre-Needling Application
- 0.5–1.5mm
- Applied before microneedling
- <5% dermal penetration
- No published efficacy data
- Peptide is mechanically removed by needle passes. Complete waste
- Delayed Post-Needling (>60 min)
- Applied after channel closure
- 8–12% dermal penetration
- Channels seal within 90 minutes
- Misses patency window. Absorption rates approach topical-only levels
- The comparison makes the mechanism clear: timing determines whether the peptide reaches target tissue. Applying GHK-Cu before needling wastes the peptide entirely. It's mechanically removed during needle passes. Applying hours later misses the absorption window as channels have already sealed.