The most extensively researched and clinically proven copper peptide is GHK-Cu, a tripeptide composed of glycine, L-histidine, and L-lysine bound to copper
While 1544% of patients experience gastrointestinal symptoms like nausea, these typically represent expected pharmacologic effects rather than true gastroparesis, which requires objective confirmation through gastric emptying studies
However, this typically subsides as the body adjusts, and many users report improved sleep quality after prolonged use
Estrogen receptor positive (ER+) breast cancer constitutes approximately 70% of all breast cancer cases, relying on estrogen for its growth [2, 3]
The oral route of administration pose challenges due to the drugs high molecular weight, extremely low absorption with the commercially available oral tablets and the drugs sensitivity to the heat required to compound it into a lozenge