Any cloudiness, discolouration, or particulate matter indicates denaturationdiscard the vial immediately
(9) A Nakamura, T Sugao, K Yamaue, M Kobatake, et al (1989) Involvement of spinal noradrenergic system in the mechanism of an antinociceptive effect of delta-sleep-inducing peptide (DSIP) Brain Research, 1989 Feb 20, Volume 480 (Issues 1-2), Pages 82-6
The pulse it produces is sharp but brief, which is the single biggest practical limitation compared to modern alternatives
Research demonstrates that injectable GHK-Cu can boost collagen production by up to 70%, speed wound healing by 30-50%, promote hair growth comparable to 5% minoxidil, and influence the expression of over 4,000 human genes in ways that favor tissue repair over breakdown