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These are dose-dependent and must be monitored closely
The injectable GHK-Cu works at a different tissue level than the topical application that follows
Studies showing meaningful hair outcomes typically used concentrations of 2% or higher, and the most successful dual-peptide formulations combine GHK-Cu (Glycyl-L-histidyl-L-lysine copper) with AHK-Cu (Alanyl-L-histidyl-L-lysine copper) the two peptides work via complementary pathways
10 mg/kg Fer-1 were applied to female C57Bl/6 mice demonstrating no protective properties regarding ( b ) serum creatinine, ( c ) serum urea, and ( d-e ) tubular injury upon medium ischaemia
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