ghk-cu mechanism of action hair growth Guide: Protocols & Results for Canadians GHK-Cu for Hair Growth: Before
Description
Because NAD+ is needed to safely transfer the energy from food to the bodys tissues, it is key for keeping DNA healthy, regulating cellular functions and more

Pregnant or breastfeeding women, minors, and untrained handlers must not handle it

The problem is what happened when it was actually tested in people
PMID: 25937599

Key Takeaway: Six application areas dominate the GHK-Cu research literature: skin regeneration, wound healing, hair follicle biology, post-procedure recovery, nerve and vascular regrowth, and barrier repair

So logically, your mind might jump to the conclusion that night-time applications are king
