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They exist in a regulatory gray area, often sold with labels that say "for research purposes only." This matters for a few reasons: Quality control is inconsistent
Melatonin acts as an anti-inflammatory agent to scavenge free radicals, reduce edema at the injury site, and reduce nerve degeneration
This responsive delivery system makes GHK-Cu fundamentally different from copper supplements, which flood tissues with uncontrolled copper ions that can generate oxidative damage
10.1038/s41591-023-02396-3 5 AlbertsA.MoldoveanuE.-T.NiculescuA.-G.GrumezescuA
High doses simply result in expensive urine and potential stomach discomfort
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