A 2026 biopharmaceutical review in a journal I do not trust said there is no identified high-affinity receptor, no validated molecular target, and a wide disconnect between the tidy preclinical effects and any coherent pharmacology
This effect has been demonstrated for certain inhibitors of sodium-glucose cotransporter-2 (SGLT2) (flozins) and certain glucagon-like peptide-1 (GLP-1) receptor agonists [125, 256, 257]
When discussing GHK-Cu with a healthcare professional, bring any products you are currently using or considering so they can review the ingredients and advise on suitability or potential interactions
Genetic Predisposition If close relatives have melasma or dark skin patches, your likelihood of getting it may be higher due to hereditary factors
2017) as shown in Table 1
SC, IM, IP, and oral routes are all used in the published literature, with SC and IM most common