Ingredient or product comparison
GHK-Cu Scar Healing Mechanism: Application Comparison
Topical cream (2% GHK-Cu) Epidermis and papillary dermis only (~0.5mm) ~0.1–0.3 µM in dermis 4–6 hours with repeated application Suitable for superficial scars and post-procedure maintenance. Limited efficacy for deep dermal scars or keloids. Microneedling wit
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- Topical cream (2% GHK-Cu)
- Epidermis and papillary dermis only (~0.5mm)
- ~0.1–0.3 µM in dermis
- 4–6 hours with repeated application
- Suitable for superficial scars and post-procedure maintenance. Limited efficacy for deep dermal scars or keloids.
- Microneedling with GHK-Cu serum
- Reticular dermis (1.5–2.5mm with 1.5mm needles)
- ~1–3 µM in treated zones
- 24–48 hours post-needling
- Most effective for atrophic scars (acne, surgical). Creates transient channels that allow peptide delivery to deeper layers where collagen remodeling occurs.
- Subcutaneous injection (compounded 5–10mg/mL)
- Direct delivery to subcutaneous tissue
- 5–15 µM at injection site
- 48–72 hours
- Rarely used for scar treatment due to injection trauma risk. Reserved for research contexts or very deep contracture scars unresponsive to surface treatments.
- Fractional laser + topical GHK-Cu
- Mid-dermis (0.8–1.2mm ablation zones)
- ~0.5–1.5 µM in ablation columns
- 12–24 hours during re-epithelialization
- Combines controlled dermal injury with peptide-enhanced healing. Strongest clinical evidence for improving texture and pigmentation in mature scars.