Recommended dose of Copper Peptides is 1% (about 1gm) to 4oz of moisturizer. You can go higher but people are finding lower doses just as effective.
GHK-Cu Tightens loose skin and reverses the thinning of aged skin. It also repairs protective skin barrier proteins to improve skin firmness, elasticity, and clarity. Reducing fine lines, and depth of wrinkles, and improving the structure of aged skin.