Wellness peptide craze: why people are injecting drugs 'not for human consumption' 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 Ghk Cu Peptide Injection IV Vitamin Therapy GHK Cu Topical Cream GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not GHK Cu Cooper Peptide: The Complete Skin & Repair Guide (2026)