GHK CU for Sale Tripeptide 1 3rd Party Tested US Made BPC 157& TB 500 & GHK Cu Peptide Blend: Mechanistic Insights 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with GHK cu 3% Serum Copper Peptide The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline