Many different people find value in GHK-Cu supplementation
The peptide is the same tripeptide, glycyl-L-histidyl-L-lysine, that occurs naturally in human plasma and declines with age, complexed with copper(II) as it is in the body
Klapheck S (1988) Homoglutathione: isolation, quantification and occurrence in legumes
With ageing and other factors like anxiety, stress, poor nutrition, and environmental toxins, glutathione levels in the body tend to decline
Combination considerations Retatrutide is sometimes considered alongside other research peptides
While GHK-Cu, a peptide that our bodies make, is used topically in skin cream in an attempt to reduce fine lines, it is not considered safe to inject due the lack of scientific research and the risks of triggering a potentially dangerous immune response