GHK Cu: My secret weapon for skin, hair, and healing, I use it two ways topical cream for my face, and subQ injections 3x a week., It boosts collagen, tightens skin, helps hair grow, and even Decipiens INVAM Long Term Severe In Vitro Hypoxia Exposure Enhances the Vascularization Potential of Human Adipose Tissue Derived Stromal Vascular Fraction Cell Engineered Tissues Dihexa c Met chemical CAS 1401708 83 5 Selleck