Are We Ready to Measure Skin Permeation of Modern Antiaging GHKCu Tripeptide Encapsulated in Liposomes? 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 Routes of Administration: Injections Subcutaneous Injection (SubQ, SC, SQ) Enters the subcutaneous fat layer ANGLE of injection: 90 (normal overweight clients) 45 (thin clients) Uses: Non irritating, water soluble medication (Examples: Insulin Can subcutaneous injection of GHKCu (copperbinding peptide) increase the risk of cancer? 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 One of the questions we often receive about our products is: Why is the GHK Cu Repairing Serum stored in two part packaging? GHK Cu is an unstable ingredient that can slowly lose its effectiveness