I thought a beauty peptide would be harder to measure the effects, but Im excited to report noticeable change within the first 2 weeks. Sometimes change happens at a slower pace based on our GH peptides + KLOW blend saved my hair. before and after pics. : r tressless 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 What Are Peptides? Dermatologist Shares Skin Benefits, Products