The recommended daily dose varies by age, physiological state, and individual health circumstances
[13] GHK-Cu coordinates Cu through the imidazole nitrogen of the histidine residue, the terminal -amino group, and deprotonated amide nitrogen atoms of the peptide backbone, forming a square-planar chelate geometry
The one exception with a genuine non-injection route is GHK-Cu, which is available as a compounded topical cream or serum that is applied daily without a prescription in many markets
No efficacy or suitability warranty: Research outcomes depend on compound form, counterion, experimental design, biological model, analytical method, solution preparation, storage history, and other variables