Ingredient or product comparison
GHK-Cu Studied Skin Elasticity: Topical vs Subcutaneous Delivery Comparison
Topical (cream/serum) 2–5% (w/w) Passive diffusion through stratum corneum; effect limited to epidermis and upper papillary dermis 8–12 weeks for elastography-detectable changes 200–400μm max penetration depth Most practical for daily use but limited to superf
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- Topical (cream/serum)
- 2–5% (w/w)
- Passive diffusion through stratum corneum; effect limited to epidermis and upper papillary dermis
- 8–12 weeks for elastography-detectable changes
- 200–400μm max penetration depth
- Most practical for daily use but limited to superficial remodeling; requires consistent twice-daily application
- Subcutaneous injection
- 200–500μg per site
- Direct delivery to reticular dermis; bypasses epidermal barrier entirely
- 6–8 weeks for ultrasound-detectable density increases
- Full dermal thickness (1–2mm depending on site)
- Produces deeper remodeling but requires sterile technique and anatomical knowledge; monthly administration typical
- Microneedling + topical
- 3–5% applied post-needling
- Microchannel creation allows enhanced penetration; inflammation primes fibroblast response
- 6–10 weeks for visible firmness improvement
- 500–1000μm depending on needle depth
- Combines advantages of both methods but adds procedural complexity; ideal for localized areas like periorbital laxity
- The delivery method you choose fundamentally alters the outcome. Topical application works for mild photoaging where the primary concern is epidermal thinning and superficial fine lines. Subcutaneous delivery targets deeper structural laxity. Jowling, nasolabial folds, neck crepiness. Where the problem isn't surface texture but loss of dermal scaffold integrity.