GHK Cu Skincare: 1 Month Update on Results In the era of MAHA, the popularity of peptides has grown, with proponents touting benefits that range from improving longevity and memory to enhancing tans and libidos. But what are people actually GHK cu 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK