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While copper peptides themselves don't cause photosensitivity, they're working to build new collagen and protect existing skin structures

They also play roles in PANS (Pediatric Acute-onset Neuropsychiatric Syndrome), depression, bipolar disorder, and anxiety disorders

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Introduction Introduction GHK-Cu ( glycyl-L-histidyl-L-lysine : copper ) is a naturally occurring tripeptide-copper complex commonly known as the copper peptide. First identified in the 1970s, GHK-Cu is present in human plasma, saliva, and urine and has become a major research focus for its potential roles in skin repair, hair growth, wound healing, and tissue regeneration. Preclinical and cosmetic-science studies suggest that GHK-Cu supports collagen synthesis, angiogenesis, and anti-inflammatory and antioxidant responsesmaking it one of the most widely studied peptides in regenerative biology. GHK-Cu Fast Facts Type: Naturally occurring tripeptide (Gly-His-Lys) complexed with copper (Cu) Discovered: 1973 Dr