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The question is: Does this compound need the local concentration spike, or is systemic exposure enough
One layering note worth knowing: copper peptides dont love sharing a step with strong acids (your AHAs and BHAs) or high-dose vitamin C
However, no instruction card, dosing guide, or Fella Health branded materials were included
That difference affects the entire comparison, from what outcomes people expect to how each compound is positioned in research discussions
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