The copper peptide is inherently stable in aqueous solution at physiological pH (6.5-7.4), which matches normal skin surface conditions
[DOI] [PMC free article] [PubMed] [Google Scholar] 104.Nabekura T., Koizumi Y., Nakao M., Tomohiro M., Inomata M., Ito Y
At a 2025 longevity conference in Las Vegas, two women ended up on ventilators after being injected with peptides the FDA had flagged as unsafe
If your GHK-Cu is cloudy but otherwise clear (no discolouration, no odour), aggregation is the likely cause
Furthermore, in glioblastoma treatment, this developed system functions as a radiosensitizer, inducing immunogenic cell death (Zhu et al., 2025a)