N-acetyl cysteine (NAC) is a precursor that helps your body make its own glutathione
"Glutathione Synthetase Deficiency"
The length of treatment depends on your goals and health history: Before stopping, its important to establish a routine with healthy diet and exercise habits
In laboratory research, GHK-Cu is utilized in gene expression profiling experiments (documented effects on 4,000+ human genes), extracellular matrix research gene expression studies (collagen I, III, IV), matrix metalloproteinase (MMP-1, MMP-2, MMP-9) and TIMP regulation assays, glycosaminoglycan deposition measurements, decorin and integrin expression studies, superoxide dismutase (SOD) activity assays, and investigations of VEGF, FGF-2 expression modulation