Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz Buy GHK Cu Exceptional 99%+ Purity Third Party COA Included Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule AHK Cu Copper Peptide Hair Growth Study (2007) Plain Language Summary Hairgenetix Professor Dr Patrick Treacy has cautioned against the current hype surrounding peptides, emphasizing that aesthetic medicine must remain grounded in solid clinical evidence rather than marketing