AHK-CU vs GHK-CU

AHK-CU

AHK-Cu is a copper-binding tripeptide composed of alanine, histidine, and lysine complexed with copper(II). Like its better-known relative GHK-Cu, it has been studied for its ability to deliver copper to cells and influence pathways involved in extracellular matrix synthesis, angiogenesis, and follicular signaling. Research interest has centered on hair growth models, where copper peptides have been observed to affect vascular endothelial growth factor expression and dermal papilla cell activity, as well as on skin remodeling and antioxidant research. Supplied as a lyophilized powder for in-vitro and laboratory research use only.

GHK-CU

GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) is a naturally occurring copper-binding tripeptide first isolated from human plasma by Pickart and Thaler in 1973. Its mechanism of action involves delivering bioavailable copper ions to tissues, where copper serves as a cofactor for lysyl oxidase (collagen crosslinking), superoxide dismutase (antioxidant defense), and other metalloenzymes critical for tissue maintenance. GHK-Cu modulates gene expression of over 4,000 human genes, broadly shifting patterns toward tissue remodeling and repair (Pickart et al., BioMed Research International, 2012). Research demonstrates it upregulates collagen types I and III, elastin, decorin, and glycosaminoglycan synthesis while simultaneously downregulating metalloproteinase activity that degrades extracellular matrix. In wound healing studies, GHK-Cu accelerated dermal wound contraction and re-epithelialization in animal models (Leyden et al., Archives of Dermatological Research, 2002). The peptide also shows neuroprotective properties; studies suggest it reduces oxidative damage markers and may support nerve regeneration through NGF and VEGF upregulation. Compared to retinoids and vitamin C in skin research, GHK-Cu operates through a fundamentally different mechanism centered on copper-dependent enzymatic activity and broad transcriptomic remodeling rather than receptor activation or direct antioxidant scavenging. At 100mg, this formulation supports extended research protocols. Store lyophilized powder at -20C protected from light; reconstitute with sterile water and refrigerate at 2-8C. GHK-Cu is researched by dermatology departments, cosmetic science laboratories, and neuroscience institutions studying copper-dependent tissue repair and gene regulation.

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