GHK-Cu upregulates collagen I and III synthesis, inhibits matrix metalloproteinases (MMP-1, MMP-2, MMP-9), activates TGF-beta signaling, and promotes angiogenesis via VEGF pathways
Some patients remain on Wegovy's maximum dose of 2.4mg indefinitely without losing additional weight because their genetic profile limits response at that level
Matrixyl is also mechanistically distinct
Since they are not FDA-approved, they do not have standardized FDA-required labeling, including side-effect warnings, boxed warnings, or risk evaluation and mitigation strategies that apply to approved drugs
References Bray F, Laversanne M, Sung H, Ferlay J, Siegel RL, Soerjomataram I, et al
Atkins MB, Mier JW, Parkinson DR, Gould JA, Berkman EM, Kaplan MM