Ingredient or product comparison
GHK-Cu Protocol: Comparison Across Administration Methods
Topical Serum (0.5-2%) 0.5-2% in neutral pH carrier Papillary dermis (0.3-0.6mm) 8-10 weeks for dermal density change 6-12 hours post-application if stored correctly Best for gradual, sustained collagen signaling. Requires consistent nightly use and copper-sta
This source-based comparison does not add ratings or recommend a winner.
- Topical Serum (0.5-2%)
- 0.5-2% in neutral pH carrier
- Papillary dermis (0.3-0.6mm)
- 8-10 weeks for dermal density change
- 6-12 hours post-application if stored correctly
- Best for gradual, sustained collagen signaling. Requires consistent nightly use and copper-stabilized formulation
- Subcutaneous Injection (1-3mg)
- 1-3mg in bacteriostatic water, 2-3x weekly
- Reticular dermis (0.6-2.0mm)
- 4-6 weeks for dermal density change
- Immediate tissue-level delivery, 72-96 hour TGF-β effect
- Fastest visible improvement but requires sterile preparation, medical supervision, and injection site rotation
- Oral Supplementation (speculative)
- Variable, no standardized dose
- Systemic distribution. Unpredictable dermal uptake
- No clinical evidence of dermal effect
- Peptide degraded by gastric acid before absorption
- Not recommended. GHK-Cu is a tripeptide rapidly broken down in the GI tract with no documented dermal bioavailability via oral route
- Microneedling + Topical (0.5-1%)
- 0.5-1% applied immediately post-microneedling
- Deep papillary to reticular dermis (0.8-1.5mm)
- 6-8 weeks for dermal density change
- Enhanced penetration within 24-hour post-needling window
- Maximizes peptide delivery depth but requires professional microneedling (0.5-1.5mm depth). At-home dermarollers insufficient