topical ghk cu side effects “Is GHK-Cu actually worth it?” is genuinely one of the most common questions in my comments, so let me finally answer it properly., The short version: copper peptides have real research behind them, Ghk-cu and skin peptides (topical)
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Aggrephagy Aggrephagy involves a routing of protein aggregates, which are unable to be degraded by proteasomes owing to their size or generation rate, to lysosomes via specific SARs (Sarraf et al., 2020)

Two to four weeks of a barrier-focused routine (gentle cleanser, ceramide-rich moisturiser, no other actives) usually restores enough function to reintroduce copper peptides safely

[Google Scholar] Schipper NG, Varum KM, Artursson P