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Both GHK-Cu and NAD+ are generally safe for all skin types when properly administered
A short peptide potentially promotes the healing of skin wound
X-ray spectroscopy study of the Cu(II)GHK peptide complex
Plasma levels drop from approximately 200ng/ml at age 20 to 80ng/ml by age 60
J Neurochem
Preclinical wound healing Animal wound-healing studies in rats, mice, rabbits, and pigs reported faster wound contraction, increased collagen, and improved angiogenesis with GHK-Cu, including systemic effects when GHK-Cu was injected at one site and improved healing at distant sites
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