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In a 2017 review, it was noted that this peptide has reduced the appearance of wrinkles by around 12% (11.64% to be exact) in human subjects

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Peptide combinations incorporating GHK-Cu with matrikines, neurotransmitter-affecting peptides, or other specialty peptides continue to proliferate in cosmeceutical markets, though clinical validation of these complex combinations generally lags behind their commercial availability

Pharmaceutical-grade sterile preparations and proper injection technique protect against the contamination and injection site complications that are possible with improper administration

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