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[125] The ability to absorb vitamin B 12 declines with age, particularly in individuals over 60
If you are considering adding GHK-Cu to your routine, here is what the science and clinical data actually say about safety, reactions, and the infamous "copper peptide uglies." (If you want the full breakdown of what GHK-Cu does for your skin, start with our deep dive on GHK-Cu benefits
Human-equivalent dosing extrapolated from animal studies suggests 200 to 500 micrograms per day, administered subcutaneously for musculoskeletal or systemic targets and orally for gut-specific applications
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