Your Daly Dose: The newest peptide that Im experimenting with is GHK CU, a naturally occurring copper complex. Great for tightening skin AND longer, stronger hair and nails! Daly Chiro Facebook GHK Cu topical Archives i313 Anti Aging] "Combining GHK Cu with red light has seen a 70% increase in collagen and a 230% increase in fibroblasts." Study with foundations out of MIT & Harvard. At a dose only required GHK Cu (copper peptide) is one of the most talked about wellness peptidesand for good reason This naturally occurring peptide has been studied for its potential to support skin quality, hair health, and