There is one more mechanistic thread worth naming because it is often invoked loosely: the copper itself
There have also been isolated reports of headache, drowsiness, and low blood pressure, though these are uncommon with oral formulations
This upgraded 5X powerful formula contains a high concentration of Glutathione, Vitamin C, Collagen, and Hyaluronic Acid, working together to reduce dark spots, minimize pigmentation, and improve skin clarity and elasticity
NAD+ levels go down as you age, which leads to cognitive decline, cancer, metabolic disease, and muscle loss
Zubair S, Hafeez S, Mujtaba G
A 2016 study published in Nature Scientific Reports directly compared copper compounds and found that while copper chloride and copper acetate were highly cytotoxic, GHK-Cu showed no cytotoxicity across all tested concentrations and did not induce inflammatory markers