What the published record does establish clearly is the result: studies appear to have been cancelled or stopped without any published conclusions, leaving a compound with over three decades of preclinical research and almost no completed human trial data [10]
Side Effects of GHK-Cu Using GHK-Cu is usually safe & tolerated well, but side effects can happen: Redness or irritation Dryness or peeling Increased sensitivity to other products Breakouts or small bumps Unknown long-term effects GHK-Cu speeds up skin renewal, which can trigger temporary redness, peeling, or bumps as your skin adjusts
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There is a lack of evidence from large, controlled studies to show that some of these supplements consistently work and are completely safe
Human clinical trial data remains limited, with Phase I and II trials for inflammatory bowel disease conducted in the 1990s claiming safety with no toxicity, though full peer-reviewed data never appeared in scientific literature