The evidence for ghk-cu topical should be weighed by study type, human relevance, route, product quality, and the limits of what has actually been demonstrated
1 2 "DNA oxidation matters: the HPLC-electrochemical detection assay of 8-oxo-deoxyguanosine and 8-oxo-guanine"
This form is standard across the copper-peptide research field, since lyophilization preserves the peptides structural stability during storage and transport in a way that liquid formulations generally cannot match
Kaeberlein M, McDonagh T, Heltweg B, Hixon J, Westman EA, Caldwell SD, et al
Secure cold-chain packaging
Sikiric, P., Seiwerth, S., Grabarevic, Z., Rucman, R., Petek, M., Jagic, V., Turkovic, B., Rotkvic, I., Mise, S., Zoricic, I., Konjevoda, P., Perovic, D., Simicevic, V., Separovic, J., Hanzevacki, M., Ljubanovic, D., Artukovic, B., Bratulic, M., Tisljar, M., & Rekic, B