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New England Journal of Medicine, 384, 9891002
PMC 12476660
Moderate - Both used in anti-aging skincare
This chemistry is the reason GHK-Cu solutions display a characteristic blue tint and why the copper is treated as an integral part of the research molecule rather than an incidental additive
Vicari E, Cerri L, Cataldo T, et al
These effects may be more pronounced in older people, as age-related loss of collagen and elastin can make the skin less able to adapt to rapid changes
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