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Neurotransmitters have either excitatory or inhibitory effects

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Steps to Try GHK-Cu Safely Talk to a healthcare provider before starting any new peptide product Choose a product from a reputable source with transparent testing Do a small patch test before full application Start with lower frequency of use to monitor your skin's response Track your results over several weeks, not days Report any unusual reactions to your provider right away Because research on GHK-Cu is still developing, working with a knowledgeable provider matters