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They degrade slowly under the wrong conditions
GHK-Cu is widely used in cosmetics and considered well tolerated topically, but it is not a medical treatment
Gene expression profiling revealed distinct apoptotic pathways: low-dose exposure triggers apoptosis through cellular stress responses, while high-dose exposure primarily activates it via direct DNA damage (160)
Patch test on a small area for 48 hours before full use, and never layer multiple acne actives without provider approval to limit irritation
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