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Issue 4: ingredient interactions in multi-product cosmetic routines Several reviews note that the chelated copper bond can be disrupted by low pH conditions associated with some other cosmetic actives, including certain forms of vitamin C and AHA or BHA exfoliants

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In patients with continuous/atypical facial pain, results are less predictable, so therapy is individualized and often begins with an optimized medication plan (dosing, combinations, sequencing)