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      learn GHK-Cu

      Copper peptide used in skin and hair cosmetics
      • How to judge a GHK-Cu product No GHK-Cu product has published human trial evidence for hair loss, so none can be ranked on efficacy; products differ in purity, stability and third-party testing. The FDA lists injectable GHK-Cu among compounding substances that may present significant safety risks (immunogenicity, impurities, limited human data).
      • GHK-Cu: Does it have side effects or is it completely safe? For topical cosmetic use, one 24-hour study in cultured skin cells found a low potential for irritation, but no clinical trial has characterised its side effects on the scalp. Injected or oral GHK-Cu has no published human safety data, and the FDA lists injectable GHK-Cu among compounding substances that may present significant safety risks.

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