Comparison
While Epitalon is reported to increase lifespan and reduce tumor incidence in animals, and to influence differentiation of neural and mesenchymal stem cells; is studied as an epigenetic regulatory peptide36, GHK-Cu acts as a tissue-remodeling and wound-healing signal, enhancing skin regeneration, angiogenesis, and repair while reducing inflammation and oxidative damage in experimental models31383.
While Epitalon works as a synthetic tetrapeptide, Ala-Glu-Asp-Gly (AEDG), that has been shown to bind histones and modulate gene expression and chromatin state, with reported effects on pineal function, neurogenesis, and longevity in animal models36, GHK-Cu is an endogenous tripeptide, Gly-His-Lys, that chelates Cu²⁺ and modulates gene expression, stimulating collagen, elastin, proteoglycan, and glycosaminoglycan synthesis while exerting antioxidant and anti-inflammatory effects31383.
Epitalon is 4 amino acids long, whereas GHK-Cu is shorter as it has a length of 3 amino acids. Epitalon is made up of a sequence of Alanine, Glutamic acid, Aspartic acid, Glycine. GHK-Cu is made up of a sequence of Glycine, Histidine, Lysine.
Epitalon
Binds nuclear histone proteins (H1, H2B, H3, H4) rather than a classic membrane receptor36
GHK-Cu
Not clearly established in the current dataset.
Epitalon
Not assigned in the current dataset.
GHK-Cu
Not assigned in the current dataset.