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Description
The stack is less appropriate for someone whose primary interest is GHK-Cu for skin aesthetics alone without a concurrent fat-loss goal

doi: 10.1089/ars.2011.4310 [DOI] [PMC free article] [PubMed] [Google Scholar] Vitvitsky V, Miljkovic JL, Bostelaar T, et al

They are grouped together because they all have a branched molecular structure and perform many similar functions

Cazzola et al
