If both are water-based serums, apply whichever is lighter first
Gene expression studies have shown GHK-Cu modulates hundreds of genes involved in regeneration, stress response, and DNA repair
Yamagishi SI, Matsui T
(Low levels of GH can lead to more body fat and weaker muscles and bones.) GH does this in part by increasing levels of insulin-like growth factor 1 (IGF-1)
Glutathione is one of the most powerful intracellular (within the cell) defence nutrients found in almost every cell in the body and is highly active, particularly in cells that are most susceptible to toxicity such as the brain, kidneys, liver, heart, lungs, skin, intestinal epithelia, cornea and retina 2
Stephen Swisher is head of the Division of Surgery and a professor of the Department of Thoracic and Cardiovascular Surgery at the University of Texas MD Anderson Cancer Center