The Copper Uglies: What the Evidence Actually Says
Copper uglies is a forum term, not a diagnosis. What people report, what the studies and the safety review really cover, and how to start GHK-Cu carefully.
Science
GHK-Cu vs Retinol: What the Studies Actually Show
The 70% vs 40% claim, traced back to its source: what GHK-Cu and retinol each have behind them, how they differ day to day, and how to use both.
How Much GHK-Cu Should a Serum Contain?
What the published studies actually say about GHK-Cu concentration, why a higher percentage is not automatically better, and how to read a copper peptide label.