Ingredient or product comparison
GHK-Cu Concentration vs Application Protocol: Research Comparison
0.05–0.1% Daily Optional Collagen synthesis upregulation via TGF-β pathway Minimal follicle diameter change; improved scalp dermal thickness Best for scalp health maintenance, not active hair growth 0.5–1.0% 5–7 days/week Recommended (0.5–1.0mm) Follicle stem
This source-based comparison does not add ratings or recommend a winner.
- 0.05–0.1%
- Daily
- Optional
- Collagen synthesis upregulation via TGF-β pathway
- Minimal follicle diameter change; improved scalp dermal thickness
- Best for scalp health maintenance, not active hair growth
- 0.5–1.0%
- 5–7 days/week
- Recommended (0.5–1.0mm)
- Follicle stem cell activation + ECM remodeling
- 12–18% increase in anagen:telogen ratio after 12 weeks
- Standard research protocol. Balance of efficacy and tolerability
- 1.5–2.0%
- 3–5 days/week
- Required (0.75–1.0mm)
- High-intensity Wnt/β-catenin signaling + anti-inflammatory
- Comparable anagen prolongation to 1.0%, higher irritation risk
- Higher concentration doesn't improve outcomes. Use lower dose more frequently instead
- Compounded with minoxidil (0.5% GHK-Cu + 5% minoxidil)
- Dual pathway: vasodilation + follicle signaling
- Additive effect. 22–28% anagen increase vs monotherapy
- Most effective documented approach when both compounds remain stable
- Concentrations above 2% show diminishing returns and increased risk of contact dermatitis without proportional gains in follicle activation. The 0.5–1.0% range represents the efficacy sweet spot validated across multiple in vitro and ex vivo follicle studies.