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These signs are often blamed on stress or age, but low B-12 can be part of the story
Red flags: No COA available, COA issued by the vendor rather than a named third-party lab, purity listed without a method, or endotoxin data absent entirely
Pharmacodynamics: GHK-Cu is a tripeptide-copper complex that influences gene expression related to collagen synthesis, elastin production, angiogenesis, and extracellular matrix remodeling
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