If you have a known copper allergy (sometimes identified through reactions to copper jewelry), patch test any GHK-Cu product on your inner forearm for 48 hours before applying it to your face
Ethics declarations Funding This work was funded by the National Institutes of Health/National Institute of Neurological Disorders and Stroke (R01NS120926 and R01NS127188 to S.A.G.), the Centers for Disease Control and Prevention/Agency for Toxic Substances and Disease Registry (R01TS000344 and R01TS000327 to S.A.G.), and James and Margaret Hiller and Linda and Eric Novak (S.A.G.)
In the end, while glutathione injections may offer potential benefits, it's essential to weigh the risks and benefits and consult with a healthcare professional before proceeding
A case series published in the American Journal of Health-System Pharmacy documented allodynia specifically associated with semaglutide, and a Cureus publication detailed dysesthesia and allodynia with both semaglutide and tirzepatide
The most common side effects with GLP-1 peptides are nausea, constipation, and bloating, especially in the first few weeks