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How does GHK-Cu clearance compare to other copper peptides like AHK-Cu

Most sublingual peptide formulations should be refrigerated

The first step involves the binding of glutamic acid and cysteine, catalyzed by GCL, to form glutamylcysteine

This research was supported in part by JST SPRING Grant Number JPMJSP2110 to KShig, GteX Program Japan Grant Number JPMJGX23B4, the Institute for Fermentation, Osaka, the Itoku Community Development Foundation and the DAAD-Kyoto University Partnership Programme toward SDGs to start in 2024 to KShir, the DAAD-Kyoto University Partnership Programme toward SDGs to start in 2024 to FK, and JSPS KAKENHI, Grant Numbers 23K25056, 24H02120, and 25K03321 to HY