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The carrier and any preservatives are part of the formulation question and vary across self-reported recipes
Patt, Leonard M., and A
doi: 10.1002/ijc.25375 [DOI] [PubMed] [Google Scholar] 19
Summary: GHK-Cu (copper peptide) has shown promise for hair loss in preclinical studies, but no robust human clinical trials have confirmed its efficacy, and it is not recommended by NICE or NHS as an evidence-based treatment
