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There are two levels available: a 250 mcg level, ideal for people needing maintenance
In sheer numbers, that means that while 8,722 Americans in this age group took a GLP-1 in 2020, 60,567 were doing so by the end of 2023
Look for: Serums , creams , or masks with clearly stated GHK-Cu concentrations Reputable brands with clinical backing or third-party testing Avoid generic copper peptides that do not specify GHK-Cu , as not all copper-bound peptides have the same effect
Retrieved 21 April 2025
PubMed PMID: 2393136
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