Copper, Collagen, and Controversy: Inside the GHK Cu Buzz Most people use GHK Cu way too early after microneedling and end up blunting the exact collagen signaling window they're trying to trigger. In this video I break down the biology of why I Does it work? Maneup GHK Cu hair growth serum : r tressless Most people use GHK Cu way too early after microneedling and end up blunting the exact collagen signaling window they're trying to trigger. In this video I break down the biology of why I AHK Cu (Copper Peptide ): Hair Follicle Regeneration