GHK Cu Side Effects: Copper Uglies PSA] Finally, a Dr. explains the mechanism behind the "copper uglies" : r SkincareAddiction GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not Oral Liposomal Copper GHK Liposomal GHK Cu Supplement GHK Cu Peptide The benefits, side effects, and more [2026]