ghk-cu modulates 4000 genes Proposed acidic degradation pathway of GHKCu in acidic solution How GHK-Cu Tightens Loose Skin:

MF756-01

Matrix Metalloproteinase Modulation GHK-Cu potently modulates the activity of matrix metalloproteinases (MMPs), a family of enzymes that degrade extracellular matrix components - while this might seem counterproductive for regeneration, controlled MMP activity is actually essential for proper tissue remodeling, removing damaged matrix to allow replacement with newly synthesized healthy matrix

Association of gephyrin and glycine receptors in the human brainstem and spinal cord: an immunohistochemical analysis

USA 96 , 77147718 (1999)

2012;7(2): e31226

This means you can layer it smoothly without worrying about that weird pilling that some products cause