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Headaches : Some individuals may experience mild to moderate headaches, often related to changes in blood pressure or hydration levels

This update was just added to the above article but for those more focused on the comments I thought Id add it here too

GHK-Cu activates the TGF-/Smad signaling pathwaythe most potent endogenous stimulator of collagen productionwhile simultaneously enhancing production of connective tissue growth factor (CTGF) and FGF-2 that further amplify collagen expression
Importantly, these shortterm trials did not find significant improvements in nonmotor symptoms or overall disease progression in the timeframes studied [38], indicating that while motor symptoms can be somewhat alleviated, more research is needed on longterm neuroprotective outcomes

References: Amend N et al (2020): Diagnostics and treatment of nerve agent poisoningcurrent status and future developments
