If pregnant, breastfeeding, taking medication or under medical supervision, consult a healthcare professional before use
Alternatives: Research Comparison For a broader comparison of GHK-Cu with other skin-active peptides, see our article on Matrixyl vs GHK-Cu skin peptide comparison and our comprehensive guide to best peptides for skin research
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A 2023 randomised trial published in FEMS Microbiology Letters extended the picture 500mg daily oral glutathione for 6 months in type-2 diabetic patients reduced pathogenic Escherichia/Shigella abundance, increased beneficial Bacteroides and Megamonas , and stabilised HbA1c (Gaike et al., 2023