Ingredient pairing
Can you mix Citric Acid and GHK-Cu?
Use with careUse these with care.
Low-pH acids and pure vitamin C can destabilize copper peptides, so side by side they may simply do less.
Do this: Keep the copper peptides in a separate routine, morning or evening.
Routine: Best kept in separate routines, morning and evening.
GHK-CuSolid and proven
General guidance, not medical advice. When in doubt, introduce one product at a time.