Ingredient or product comparison
The Collagen Production Comparison
Another critical study compared GHK-Cu to two gold-standard anti-aging ingredients: vitamin C and retinoic acid. Women applied each treatment to thigh skin for 12 weeks while researchers measured collagen production through biopsy samples. The results surprise
This source-based comparison does not add ratings or recommend a winner.
- Another critical study compared GHK-Cu to two gold-standard anti-aging ingredients: vitamin C and retinoic acid. Women applied each treatment to thigh skin for 12 weeks while researchers measured collagen production through biopsy samples.
- The results surprised many dermatologists. GHK-Cu improved collagen production in 70% of women treated. Vitamin C improved collagen in 50%. Retinoic acid improved collagen in 40%.
- Copper peptides outperformed both vitamin C and prescription-strength retinoid for stimulating new collagen synthesis. This doesn't mean they're universally "better," since each compound works through different mechanisms and offers different benefits. But it establishes that copper peptide treatments produce measurable structural improvements in skin tissue.