Understand the source comparison
AHK-Cu Hair Growth Protocol: Method Comparison
Topical (massaged into scalp) 40–60% dermal penetration Low. No sterile technique required 15–20 minutes to reach follicular dermis 3–5 times weekly Best for researchers prioritising ease of use over maximum potency. Limited by stratum corneum barrier Subcutan
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Topical (massaged into scalp)
- 40–60% dermal penetration
- Low. No sterile technique required
- 15–20 minutes to reach follicular dermis
- 3–5 times weekly
- Best for researchers prioritising ease of use over maximum potency. Limited by stratum corneum barrier
- Subcutaneous injection (0.5-inch needle, 45° angle)
- 85–95% direct dermal delivery
- Moderate. Requires sterile needle handling and site rotation
- Immediate. Peptide enters dermal layer within 60 seconds
- Highest efficacy for miniaturised follicles requiring direct dermal papilla stimulation. Technique-sensitive
- Microneedling pre-treatment + topical
- 70–80% enhanced penetration via microchannels
- High. Requires 0.5–1.0mm dermal roller, strict sterilisation
- 10–15 minutes post-needling
- 2–3 times weekly (limited by skin recovery)
- Balances higher absorption with scalp trauma risk. Ideal for researchers experienced with microneedling protocols