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When used in moderate amounts, copper peptides (Glycl-L-histidyl-L-lysine-Copper II, also known as GHK-Cu) may be a powerful weapon against skin aging. Can copper peptides drastically improve collagen synthesis? Yes. Copper peptides have been known to induce collagen production in fibroblasts in vitro as long ago as 1988. Since that time, some studies have found that Read more »