GHK CU Apollo Peptide Sciences GHK cu hard spots at injection site : r Peptides GHK Cu Topical Cream Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application ScienceDirect GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection