Two Weeks on GHK CU by Rory Uphold The Ladies Room Copper Peptide Regenerating Serum for Glowing Skin and Hair GHK Cu = hype or real science?, Natural peptide, Declines with age, Strong lab data, But:, Topical = useful for skin and hair, Injectable = for injuries and inflammation , #GHKCu Copper peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix