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Description
GHK-Cu's hair mechanism works through VEGF stimulation (improving follicle blood supply) and TGF-beta1 inhibition (preventing premature follicle regression)

A CDC Fact Sheet on the effect is available here

342,343,344 The GLP-1R signaling pathway may also affect the expression of MMP-13 and ADAMTS5, by reducing the signal transduction caused by IL-1, thus decreasing their synthesis

Inhaled glutathione may trigger asthma attacks in people who have asthma

Other reported effects include headaches, dizziness, nausea, and gastrointestinal discomfort, though these are less common
