Ingredient or product comparison
AHK-Cu GHK-Cu Protocol Hair Research: Treatment Comparison
GHK-Cu + Microneedling 1.5mm needle depth, monthly 2% GHK-Cu topical 28.4 hairs/cm² +19% mean diameter Most robust clinical evidence. Ideal for vertex thinning and early-stage AGA AHK-Cu + GHK-Cu Combination 1.0mm needle depth, biweekly 1% AHK-Cu / 1% GHK-Cu t
This source-based comparison does not add ratings or recommend a winner.
- GHK-Cu + Microneedling
- 1.5mm needle depth, monthly
- 2% GHK-Cu topical
- 28.4 hairs/cm²
- +19% mean diameter
- Most robust clinical evidence. Ideal for vertex thinning and early-stage AGA
- AHK-Cu + GHK-Cu Combination
- 1.0mm needle depth, biweekly
- 1% AHK-Cu / 1% GHK-Cu topical
- 18–22 hairs/cm² (estimated from pilot data)
- +15–17% mean diameter
- Synergistic mechanism. Preferred when targeting both keratinocyte proliferation and angiogenesis
- Topical GHK-Cu Alone (No Needling)
- Twice-daily application
- 3% GHK-Cu topical
- 4–7 hairs/cm²
- +5–8% mean diameter
- Poor bioavailability without penetration enhancement. Not recommended as standalone
- Oral Copper Supplementation
- Oral tablet (2mg elemental copper)
- N/A
- No measurable follicular effect
- No change
- Systemically absorbed copper does not concentrate in follicular tissue. Ineffective for hair regrowth