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Avoid applying strong vitamin C products, high-concentration retinoids, or low-pH chemical exfoliants at the same time as AHK-Cu
Serious adverse events have not been widely reported in the community, but the lack of long-term safety data means unknown risks may exist
Subgroup analyses evaluated four key factors: administration route efficacy, daily dosage, age group and clinical conditions that may affect vitamin B12 metabolism (e.g., underlying pathology)
Some patients use extended protocols with physician oversight for complex healing challenges
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