Ingredient or product comparison
Injectable vs topical GHK-Cu
Injectable (most powerful): Systemic effects throughout body 80-90% bioavailability Works on skin from inside out Dose: 1-3mg, 3-7x weekly Best for comprehensive anti-aging Topical (easiest): Applied to skin surface Lower absorption (1-2% concentration in seru
This source-based comparison does not add ratings or recommend a winner.
- Injectable (most powerful):
- Systemic effects throughout body
- 80-90% bioavailability
- Works on skin from inside out
- Dose: 1-3mg, 3-7x weekly
- Best for comprehensive anti-aging
- Topical (easiest):
- Applied to skin surface
- Lower absorption (1-2% concentration in serum)
- Works locally on skin
- Daily application
- Best for focused skin improvement
- Can combine with injectable
- Which to choose:
- Injectable: Serious anti-aging, whole-body benefits
- Topical: Easier, good for skin-only goals
- Both: Maximum results
- See our copper peptides GHK-Cu guide, glow peptides guide, glow peptides, and injectable vs oral peptides.