Ingredient or product comparison
Comparison: Alcohol Types in GHK-Cu Formulations
Ethanol / Alcohol Denat. Solvent, penetration enhancer, preservative Accelerates copper dissociation by lowering pH and increasing oxidative stress; 40–60% peptide loss within 30 days above 15% concentration Safe at <5%; avoid above 10% Avoid in top 5 ingredie
This source-based comparison does not add ratings or recommend a winner.
- Ethanol / Alcohol Denat.
- Solvent, penetration enhancer, preservative
- Accelerates copper dissociation by lowering pH and increasing oxidative stress; 40–60% peptide loss within 30 days above 15% concentration
- Safe at <5%; avoid above 10%
- Avoid in top 5 ingredients. Peptide degradation risk outweighs any penetration benefit
- Isopropyl Alcohol
- Solvent, antimicrobial
- Strongly destabilises copper chelation; generates reactive oxygen species during evaporation; not suitable for peptide formulations
- Unsafe at any concentration >2%
- Hard avoid. No therapeutic justification for inclusion in GHK-Cu products
- Cetyl / Stearyl / Cetearyl Alcohol
- Emulsifier, texture modifier, emollient
- No impact on peptide stability; chemically inert with respect to copper binding
- Safe at any typical cosmetic concentration
- Safe. These are fatty alcohols, not solvents; presence in ingredient list is not a concern
- Benzyl Alcohol
- Preservative
- Minimal impact at preservative concentrations (<1%); some antioxidant properties may reduce oxidative degradation
- Safe at <1%; evaluate above 1%
- Safe when used as preservative. Becomes problematic only at solvent-level concentrations (>5%)
- Phenoxyethanol
- No direct interaction with peptide structure; may slightly reduce microbial peptide degradation in opened products
- Safe at <1%
- Safe. Standard preservative with no copper chelation interference