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Retatrutide's dysesthesia signal at high doses is a per-compound safety question

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GHK-Cu is a naturally occurring copper-binding tripeptide studied in laboratory environments for its interaction with extracellular matrix signaling pathways, copper transport activity, and peptide-mediated gene expression models

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Isolated human HFs were cultured in a 35-mm culture dish containing 1.5 ml complete hair follicle culture medium