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Plasma levels of GHK-Cu are highest in young adults (approximately 200 ng/mL) and decline significantly with age (dropping to approximately 80 ng/mL by age 60), which is a central focus of age-related research
Tetra-heteroatom (N, O, S, P) self-doping was realized through paper mulberry-derived carbon (PMAC700-3, Fig
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These analytical measures support reproducibility, consistency, and confidence across independent laboratory investigations
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