Copper peptides + BHA
Keep them apartKeep them apart. A low-pH BHA (salicylic acid) destabilizes copper peptides, which prefer near-neutral pH - direct layering cuts the peptides' effectiveness.
Separate routines fix it: BHA in one part of the day, copper peptides in the other, or alternate days.
Note where the BHA lives. A salicylic acid cleanser rinses off in seconds, so it's gentler on the pairing than a leave-on BHA serum or toner - that leave-on layer is the one to schedule away from your peptides.
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