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Deeper improvements in tone and firmness often appear after 48 weeks of consistent use
Hsieh MJ, Lee CH, Chueh HY, et al
Comparative Effectiveness In comparative analysis, GHK-Cu improved collagen production in 70% of treated women compared to 50% with vitamin C cream and 40% with retinoic acid
a mild stinging sensation may occur due to the quinolinium structure
The goal is to have healthier-looking skin, not a lighter complexion
Lower starting doses reveal how your skin and body respond before you commit to higher amounts
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