Ingredient or product comparison
GHK-Cu Skin Health Protocol Dosage Timing: Comparison
Topical Serum (1–2%) 0.5–1mL per application Twice daily 7–9 AM and 8–10 PM 0.3–0.5% reaches dermis Best for consistent daily maintenance; requires disciplined twice-daily application to achieve results Subcutaneous Injection 0.5–2mg per dose Weekly Any consis
This source-based comparison does not add ratings or recommend a winner.
- Topical Serum (1–2%)
- 0.5–1mL per application
- Twice daily
- 7–9 AM and 8–10 PM
- 0.3–0.5% reaches dermis
- Best for consistent daily maintenance; requires disciplined twice-daily application to achieve results
- Subcutaneous Injection
- 0.5–2mg per dose
- Weekly
- Any consistent day/time
- Near 100% systemic
- Highest bioavailability; suitable for research protocols requiring precise dosing; requires sterile technique
- Topical Cream (0.5–1%)
- 1–2g per application
- Same as serum
- 0.2–0.4% reaches dermis
- Lower concentration = lower potency; acceptable for sensitive skin but slower visible results
- Microneedling + Topical
- 1–3% solution applied post-needling
- Weekly or biweekly
- Evening, post-procedure
- 5–10× higher than intact skin
- Microneedling creates transient channels; dramatically increases dermal penetration but requires recovery time