One can point to DARPA, or a variety of consumer products derived from scientific discoveries made by the space program, as a (sound!) justification for government R&D investment
L-ascorbic acid (vitamin C) oxidizes the copper(II) ion in GHK-Cu, neutralizing both actives
Regarding glutathiones benefits on the skin, some patients report improvements in at least two or three weeks, including fewer breakouts and a smoother texture
Research suggests that glutathione may help regulate blood pressure by improving endothelial function, enhancing nitric oxide production, and reducing oxidative stress, which are all essential factors in maintaining healthy blood pressure levels
The Use of Low-Dose Naltrexone for Chronic Pain Kirbie M Bostick, Andrew G McCarter, Diane Nykamp PMID: 30821677 DOI: 10.4140/TCP.n.2019.43 Review:Med Sci (Basel) 2018 Sep 21;6(4):82