I've had @sumanurica in my routine for almost a year now, so adding the new GHK Cu Repairing Serum felt like the perfect next step It's lightweight, calming and layers beautifully, especially Korean Skincare Redifined Ageless Radiance Club GHK Cu What is it and why do you need it? SumaNurica Research chemicals known as peptides, many of them banned by the World Anti Doping Agency and some not approved for human use in the United States, are available with the simple click of 3% GHK Cu Medical Grade Skin Cell Regenerative Serum Vitali Vitali Skincare