How does GHK-Cu compare to retinol for skin improvement?

GHK-Cu and retinol work through different mechanisms - GHK-Cu stimulates collagen synthesis and tissue remodeling, while retinol increases cell turnover. GHK-Cu may be gentler with less irritation than retinol, making it suitable for sensitive skin. Some skincare protocols combine both for complementary anti-aging effects. <a href='https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4594048/' target='_blank'>GHK-Cu skin remodeling research</a>