Ingredient or product comparison
GHK-Cu Concentration: Formulation Type Comparison
Research serum (cosmetic testing) 0.5–2% Distilled water + hyaluronic acid 14–21 days Bacteriostatic water or distilled water Best for short-term studies. Minimal interference from carrier ingredients Daily-use cosmetic serum 1–3% Glycerin, propylene glycol, a
This source-based comparison does not add ratings or recommend a winner.
- Research serum (cosmetic testing)
- 0.5–2%
- Distilled water + hyaluronic acid
- 14–21 days
- Bacteriostatic water or distilled water
- Best for short-term studies. Minimal interference from carrier ingredients
- Daily-use cosmetic serum
- 1–3%
- Glycerin, propylene glycol, aloe vera gel
- 30–60 days
- Propylene glycol or vegetable glycerin
- Hygroscopic carriers extend peptide stability and improve skin penetration
- Anti-aging cream (emulsion)
- 0.5–1.5%
- Oil-in-water emulsion with emulsifiers
- 60–90 days
- Pre-dissolved in aqueous phase before emulsification
- Lower concentration compensates for occlusive carrier. Peptide stays on skin longer
- Hair growth topical
- 2–5%
- Ethanol or DMSO carrier
- 30 days (ethanol evaporates)
- Ethanol 70% or DMSO
- High concentration needed for scalp penetration. Solvent evaporates post-application