If you're playing with raw GHK Cu, here's the secret that makes it actually work on your skin: mix it with hyaluronic acid. Not microneedling, not fancy devices just a clean GHK Cu Copper Peptide Neck & Face Serum Copper Peptide Regenerating Serum Booster Pptido de cobre GHK GHK Cu Tripptido 1
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how to make ghk-cu serum Copper Peptide Hair Growth Serum