Loose skin isnt about age alone., Its about collagen signaling., GHK Cu (copper peptide) is known for supporting pathways involved in:, Collagen and elastin production, Skin remodeling and GHK Cu Facial Serum 0.5%, 30 grams Defy Medical GHK Cu Peptide: What It Does for Body Composition and Metabolic Health Microneedling to tighten loose skin around waist after weight loss: is the tightness permanent? : r Microneedling 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