GHK Cu copper peptides calm, repair, strengthen If your skin often feels: red or reactive irritated even from gentle skincare tight, dehydrated or burning tired and sensitive GHK Cu Sundrata Clinic Most people use GHK Cu way too early after microneedling and end up blunting the exact collagen signaling window theyre trying to trigger. In this video I break down the biology of why I wait around Topical GHK CU and microneedling : r Microneedling What is the comparison between microneedling with GHK cu (Gly His Lys Copper) versus Platelet Rich Plasma (PRP) for treating sagging skin?