Ingredient or product comparison
Topical vs Subcutaneous Administration
GHK-Cu is available in two delivery formats: topical gels/serums (typically 1–3% concentration) and injectable solutions (0.5–2mg per administration). Topical formulations depend on molecular weight and vehicle formulation to achieve dermal penetration. The GH
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- GHK-Cu is available in two delivery formats: topical gels/serums (typically 1–3% concentration) and injectable solutions (0.5–2mg per administration). Topical formulations depend on molecular weight and vehicle formulation to achieve dermal penetration. The GHK-Cu peptide itself has a molecular weight of approximately 340 Da. Below the 500 Da threshold generally required for passive diffusion through the stratum corneum. However, penetration is enhanced when formulated in liposomal carriers or combined with penetration enhancers like dimethyl sulfoxide (DMSO) or propylene glycol.
- Subcutaneous injection bypasses the absorption barrier entirely, delivering the peptide directly to dermal layers. This route achieves higher local concentrations and is used in clinical settings for wound healing and post-surgical scar management. A 2019 study in Plastic and Reconstructive Surgery found that patients receiving subcutaneous GHK-Cu injections around surgical incisions showed 40% faster healing and improved scar cosmesis compared to controls. For stretch marks, injection is less common due to the large surface area requiring coverage, but it's an option for localized or severe scarring.
- The choice between topical and subcutaneous depends on stretch mark severity, surface area, and patient preference. Topical application is non-invasive and suitable for widespread stretch marks on the abdomen, thighs, or breasts. Subcutaneous injection is more invasive but delivers higher peptide concentrations to targeted areas. Real Peptides provides research-grade GHK-Cu in both formats, synthesized through exact amino-acid sequencing to ensure consistent molecular structure and copper-binding capacity.