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Oxidation: Certain amino acid residues, particularly those with thiol or aromatic side chains, are vulnerable to oxidative damage from oxygen exposure and UV light
as of 2026, the FDA has placed injectable GHK-Cu on its Category 2 bulk drug substances list, meaning it cannot be legally compounded for injection due to immunogenicity and impurity concerns
side effects [1] Mood disturbance, agitation, psychosis
Progress photos taken at consistent intervals will document changes that occur too gradually to notice day-to-day
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