Boulder The tendency of GHK copper to repair collagen to a normal state leads to the following potential aesthetic benefits: The tightening of loose skin and reversal of thinning skin related 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 GHK Cu Face Serum 1200MG Lab Tested & High Potency Neurogan Health GHK Cu Peptide Skin Cream for Women: Anti Aging & Repair Joi + Blokes GHK CU Before and After Pictures Topical GHK Cu Skin Results, Face Serum Reviews & Photo Results Neurogan Health