#445

GHK-Cu was completely fine at first.

GHK-Cu was completely fine at first. Then weeks into using it, every injection started leaving behind an angry, painful lump. I diluted it. Injected slower. Rotated locations. Let it reach room temperature. Nothing fixed it. My body apparently needed several weeks to decide it hated copper peptides.

Anonymous user report. Not medical advice. Peptides discussed are not FDA-approved for the uses described. Editorial process →

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Published August 12, 2026