When GHK-Cu is injected, free copper can temporarily separate from the peptide backbone before rebinding in tissues
Standard vitamin C can also be limited by "transporter saturation," where the body can only absorb so much at once
Set Clear Health Goals The best time to take glutathione depends on your health goals
Table 5 Genes relevant to DNA repair affected by GHK 4.7 GHK vs GHK-Cu 4.7 GHK vs GHK-Cu There are many studies that obtain significant results with copper-free GHK, but the copper chelator bathocuproine abolishes the GHK effects
Zhang J, Liu C, Liao Y, He W, Zheng Y, Shi H, Liu Q, Lin J, Gao C, Wang X, Gao L (2026) Copper overload induces lifespan shortening through activating mitochondrial respiration in Caenorhabditis elegans
One capsule contains 1000mg of vitamin C in the form of calcium ascorbate, the so-called buffered vitamin C