zinc ghk cu Zinc/copper supplement w/GHK : r/Biohackers Multi-Peptide + Copper Peptides 1%

The contrast is not meant to disparage GHK-Cu

Many patients report less tiredness within two to four weeks of starting injections, depending on how depleted their levels were at baseline

This feature gives PDA an advantage in recovery efficiency, especially when cardiovascular and blood flow support are priorities

Very rare but more serious side effects include irregular heartbeats/ palpitations or in extremely rare cases can cause an allergic reaction (anaphylaxis) but I have an EpiPen at hand to treat you immediately should this extremely rare occurrence happen.

Apart from the effectiveness, another question that is tried to be answered is whether skin permeability of GHK allows it to act as an anti-wrinkle peptide at its site of action