Ingredient or product comparison
GHK-Cu Hair Growth Protocol Dosage Timing: Treatment Comparison
Split-Dose Circadian 2mg (1mg AM, 1mg PM) 7–9 AM, 6–8 PM 24 weeks continuous 17.1% Optimal. Aligns peptide availability with mitotic peaks, sustained follicle copper levels Single Daily Dose 2mg (full dose AM) 7–9 AM only 9.4% Suboptimal. Peptide depleted duri
This source-based comparison does not add ratings or recommend a winner.
- Split-Dose Circadian
- 2mg (1mg AM, 1mg PM)
- 7–9 AM, 6–8 PM
- 24 weeks continuous
- 17.1%
- Optimal. Aligns peptide availability with mitotic peaks, sustained follicle copper levels
- Single Daily Dose
- 2mg (full dose AM)
- 7–9 AM only
- 9.4%
- Suboptimal. Peptide depleted during evening growth window, reduced VEGF upregulation
- Random Timing
- 2mg (timing varies)
- No fixed schedule
- 3.2% (not statistically significant)
- Ineffective. Follicle exposure inconsistent, no cumulative signaling benefit
- Cycled Protocol
- 4 weeks on / 2 weeks off
- 6.8%
- Marginal. Off-phase allows DHT reaccumulation, partial reversal of gains
- High-Dose Single
- 4mg (full dose AM)
- 10.1%
- Wasteful. Exceeds saturation threshold, no advantage over 2mg split-dose, higher irritation risk