We formulate our copper peptide serum at 1% GHK-Cu, the concentration studied in published research, so your results aren't being diluted by 30 other filler ingredients
Since all other reagents are provided in excess, the GPx activity is rate-limiting
Oxidative glutathione depletion
In addition, glutathione supplements are available in various forms, such as oral capsules and liposomal formulations that enhance absorption
"You won't look or feel better, and you are very likely to end up injured, dead, out of money or all the above." Your health and safety come first
CASSCF(14,13) geometry optimization of one form of vitamin B12 and models of glutathione, NADPH, FMN, or FAD shows that all forms interact with these agents by breaking Co-C or Co-O bonds and accepting one electron or significant electron density, increasing electron transfer toward the end of the reactions