how long till ghk cu works GHK-Cu Peptide GHK-Cu Peptide: Benefits for Skin
Description
Been using RTA in my studies for 3 months

Arrows indicate open defects (controls) or practically closed defect (BPC 157 rats)

The systemic copper load from topical application is minimal, so there's generally no concern about combining routes
Other potential benefits include: Producing brain-derived neurotrophic factor and nerve growth factor

For those who eat meat and dairy and do not have an underlying issue preventing B12 absorption, this should not be a problem