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GHK-Cu shows anti-tumour activity in cell and animal models
doi: 10.1007/s13258-019-00824-8 262 KhayyalMTKreuterMHKemmlerMAltmannPAbdel-NabyDHEl-GhazalyMA
Biogerontology 2016;17, 305-315, doi:10.1007/s10522-015-9610-z
Serum levels sit around 200 nanograms per milliliter at age 20 but decline to approximately 80 nanograms per milliliter by age 60
