Ingredient or product comparison
Delivery Methods: Topical vs Injectable vs Microneedling
The delivery method determines how much GHK-Cu reaches the dermal papilla, which sits 3 to 4 mm below the scalp surface. Penetration to follicle depth is the rate-limiting factor for every protocol.
This source-based comparison does not add ratings or recommend a winner.
- The delivery method determines how much GHK-Cu reaches the dermal papilla, which sits 3 to 4 mm below the scalp surface. Penetration to follicle depth is the rate-limiting factor for every protocol.