Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Comparison: AHK-Cu vs GHK-Cu for Hair Research Applications

Dermal Penetration (Topical) Moderate (Franz cell: 12% penetration at 24h) High (Franz cell: 22% penetration at 24h) AHK-Cu reaches follicular bulge more efficiently in topical protocols TGF-β Receptor Affinity High (IC₅₀ ~0.8 µM) Moderate (IC₅₀ ~2.1 µM) GHK-C

This source-based comparison does not add ratings or recommend a winner.

  • Dermal Penetration (Topical)
  • Moderate (Franz cell: 12% penetration at 24h)
  • High (Franz cell: 22% penetration at 24h)
  • AHK-Cu reaches follicular bulge more efficiently in topical protocols
  • TGF-β Receptor Affinity
  • High (IC₅₀ ~0.8 µM)
  • Moderate (IC₅₀ ~2.1 µM)
  • GHK-Cu shows stronger anti-fibrotic effects at lower concentrations
  • SOD Activation
  • Moderate (1.5× baseline at 10 µM)
  • High (2.8× baseline at 10 µM)
  • AHK-Cu better suited for oxidative-stress models
  • Optimal Concentration Range
  • 0.01–1.0 µM (cell culture); 0.5–2 mM (topical)
  • 0.5–5 mM (topical); limited cell culture data
  • GHK-Cu effective at lower molarity in direct-contact studies
  • Stability (pH 6.5, 25°C, 60 days)
  • 82% retention (measured via UV-Vis)
  • 79% retention
  • Both require refrigeration for long-term storage
  • Bottom Line
  • Gold standard for TGF-β modulation and anagen extension in controlled studies; lower penetration limits topical efficacy unless microneedled
  • Superior penetration makes it ideal for topical research; weaker receptor binding requires higher application concentrations