Unlike conventional supplements, many peptides are administered through subcutaneous or intramuscular injection, often obtained through nonregulated sources with uncertain sterility, concentration accuracy, and compositional reliability (Wang et al
Seiwerth, S., Sikiric, P., Grabarevic, Z., Zoricic, I., Hanzevacki, M., Ljubanovic, D., Coric, V., Konjevoda, P., Petek, M., Rucman, R., Turkovic, B., Perovic, D., Mikus, D., Jandrijevic, S., Medvidovic, M., Tadic, T., Romac, B., Kos, J., Peric, J.,
Non-irritating and non-darkening, they deliver safer, more effective anti-aging resultsHyaluronic Acid + GHK-Cu work synergistically to deeply hydrate and repair the skin barrier, leaving skin persistently moisturized, plump, and elastic
10.1155/2011/796025 9 KlicekR.KolencD.SuranJ.DrmicD.BrcicL.AralicaG.et al (2013)