ghk-cu clinical research GHK-Cu Dosage and Protocol: A
Description
doi: 10.1084/jem.173.2.287

Cons: Requires self-education and comfort with needles

Available online: 43.Agrawal M., Konwar A.N., Alexander A., Borse V

Clinical studies use devices like VISIA imaging systems or 3D profilometry to eliminate these variables entirely