GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare Get glowing skin with GHK CU peptide therapy GHK CU is a naturally occurring plasma peptide that significantly declines during aging. GHK CU exhibits anti aging properties by: stimulating collagen production improving skin elasticity and