GHK Cu Peptide: What It Does for Body Composition and Metabolic Health 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 Advanced GHK Cu Neck & Face Serum Perhaps the most commonly asked about question when it comes to GHK Cu is THE BURN. Let's learn! @summitrejuvenation GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu Organic Serum Copper Peptide for Anti Aging & Skin Repair