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The copper peptides troubleshooting guide and GHK-Cu making skin worse page address this phenomenon in detail
doi: 10.1038/s41422-020-0379-5 25 QianXYangZMaoEChenE
Post-breakout dryness and irritation
Reduced Pro-Inflammatory Cytokine Activity: TNF-alpha and IL-6 expression decreases in BPC-157-treated injury sites, shortening the acute inflammatory phase that precedes productive tissue remodeling
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