HGH: THE IGF 1 INSULIN AXIS IS A TRUE DR. JEKYLL AND MR. HYDE ON ONES' HEALTH PUR FORM Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference By age 30, your skin produces about 25% less collagen. By 40, that number can reach 40%. This decline affects more than just how your skin looks. It changes how it heals, GHK vs GHK Cu Without Copper, Basic Peptide Neurogan Health