ghk cu topical vs injectable comparison GHK-Cu - Peptide for Collagen, Healing & Anti-Aging 7% GHK-Cu Accelerant for Cosmetics
Description
Citation on PubMed Ferenci P

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Experimental study on centrifugal melt electrospinning
Sourcing quality peptides Product quality matters significantly for peptide outcomes

A significant limitation of permeation enhancers is the potential for local mucosal irritation, impaired ciliary function, and epithelial disruption, particularly when surfactant-type enhancers are utilised at elevated concentrations or with prolonged exposure (Maher et al., 2019

If you find it in oil based solution then it would be slow release and you would have to inject less frequently
