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(2025) called the absence of clinical permeation data "surprising" given how widely GHK-Cu is marketed

If you are already using retinoids, AHAs, or other actives that increase cell turnover, adding GHK-Cu on top without adjusting your routine is asking for trouble

Covers: animal models of appetite, acute vs chronic amylin effects, lesion studies of the area postrema, combined effects with leptin and CCK

An interesting note: Drinking coffee has been shown to increase plasma glutathione levels

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Glutathione is the bodys master antioxidant a tripeptide synthesized in every cell that neutralizes reactive oxygen species, drives Phase II hepatic detoxification, supports immune function, and protects mitochondrial integrity