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Conclusion When used thoughtfully, copper peptides for collagen, and GHK-Cu in particular, offer a targeted way to support smoother skin, improved firmness, and healthier-looking hair
Do not use normal saline, as salt can dissociate copper from the peptide
Build a protocol that matches your biology and safety profile
Nature 642 , 756765 (2025)
They are more readily absorbed than protein-derived AAs and can be recognized by specific receptors on various cells
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