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Toxicity of Biologically Active Peptides and Future Safety Aspects: An Update
For individuals with Wilson's disease (a genetic disorder causing copper accumulation) or other copper metabolism disorders, theoretical caution is warranted, though even in these populations topical GHK-Cu is unlikely to pose significant risk given the minimal systemic absorption
The peptide begins stimulating fibroblast activity and collagen synthesis, but these processes take time to produce visible results
Melanin is the pigment that colors your skin, the more melanin your body produces, the darker your skin tone
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