GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes DMSO Explained Why We Mix It With (GHK Cu) Copper Peptides Topic GHK Cu Liposome Copper Tri Peptide 1 Liquid 10% GHK: A comprehensive researcher's handbook Tydes Amazon.com : Amino Innovations Peptide Hair Serum for Hair Growth Thicker, Fuller, and Stronger with Copper Tripeptide 1, Zinc Thymulin & PTD DBM DMSO Enhanced Formula for Scalp Health and Resilience :
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