As a general rule, it's best to avoid applying GHK-Cu in the exact same routine as strong direct acids, like L-Ascorbic Acid (the most common form of Vitamin C), or retinoids
Acknowledgements These studies were supported by grants from the Swedish Research Council (4792), the Free Masons in Stockholm for Children's Welfare, the Memory Foundation of Golje, the HRH Crown Princess Lovisa Foundation, the ke Wiberg Foundation, the Ronald McDonald Foundation, the Linna and Josef Carlsson Foundation, the Lennanders Foundation, the Swedish Society of Medicine, and the Samariten Foundation, which are gratefully acknowledged
Are copper peptides safe
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