Copper Tripeptide-1

The low pH environment created by glycolic acid can destabilize copper peptides (GHK-Cu), reducing their efficacy. Apply peptides after the skin has returned to its normal pH, or use them at a different time of day.

The acidic pH required for salicylic acid can destabilize copper peptides, reducing their effectiveness. Separate usage to different steps in your routine or different times of day.

Retinol and copper peptides may reduce each other's efficacy when used together. Copper peptides can chelate and interfere with retinoid activity, while retinol's low pH can destabilize peptides. Use on alternating nights.

Ascorbic acid's low pH can destabilize copper peptides. Additionally, copper ions can catalyze the oxidation of vitamin C, potentially reducing the efficacy of both. Best used at different times of day.