AHK-CU (Copper Peptide) is a modified version of the natural peptide GHK-Cu (Glycyl-Histidyl-Lysine complexed with Copper), where the Alanine-Histidine-Lysine (AHK) sequence replaces the original Glycine-Histidine-Lysine (GHK) sequence. This synthetic peptide is widely used in skincare, haircare, and wound healing due to its bioactive properties.

AHK-Cu is a water-soluble powder added to formulations at a suggested use level of 0.3% to 1% or 0.5% to 2%, not as a standalone mixture with pure water, but as an ingredient in a larger DIY product. To create a DIY serum or cream, you would combine the AHK-Cu powder with water and other ingredients like glycerin or preservatives at these recommended concentrations.