Key Takeaways Collagen does the structural work think elasticity, hydration, and those fine lines that show up under harsh lighting Glutathione is more about what you see: brightness, even tone, less of that dull pigmentation that sneaks up over time Together, they're not competing
PMC 11228880
Statements Author contributions YW: Conceptualization, Investigation, Resources, Writing original draft, Funding acquisition, Writing review & editing, Project administration, Data curation, Formal analysis, Methodology
The mainstream copper-biology research community and the broader peptide research community have engaged with the GHK-Cu literature at various points, but the depth of independent characterization outside the Pickart-affiliated research has been variable
& Nourian, M