Copper Peptide Shampoo & Conditioner Set GHK Cu Hair Care Hairgenetix This compound has been studied for over 50 years. Most people discovered it last year on social media. In 1973, Dr. Loren Pickart identified GHK Cu while studying why young blood could Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz One of my favorite peptides is GHK Cu. It has made such a dramatic impact on my skin in just one cycle I've been shocked! It supports collagen, healing, and overall skin Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides