does ghk cu hurt when injected why is the injection site painful after administering GHK- Cu (Glycyl-L-Histidyl-L-Lysine-Copper) 2mg mixed with normal saline? KPV/NAD+/GHK-Cu - Peptide Patch Quantity:3 Pack (Save 20%) Laboratory Peptides GHK-Cu + AHK-Cu Exosome
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