ghk cu europe GHK-CU – Research Peptide NL-GHK-Cu™ (TETRAPEPTIDE + CU) |

The most common side effects are extremely mild and infrequent, primarily involving occasional skin irritation, mild redness, or transient tingling sensation in a small percentage of users, typically resolving without intervention and not requiring discontinuation

The literature supports GHK-Cu here strongly: Leyden et al

Short answer GHK-Cu vs AOD-9604 comparison

Conclusion It has long been accepted that the human copper-binding peptide GHK-Cu enhances healing of dermal wounds and stimulates skin renewal exhibiting a wide range of effects

The amount of copper delivered topically is far too small to cause skin discoloration